/* =========================================================
   小奥错题本 · 设计系统
   ========================================================= */

:root {
  --bg: #f4f0e7;
  --bg-deep: #ebe4d6;
  --paper: #fffdf7;
  --paper-2: #faf6ec;
  --ink: #20352f;
  --ink-2: #42554e;
  --muted: #78847c;
  --muted-2: #9ba49d;
  --line: #e6dfd1;
  --line-strong: #d7cdbb;
  --green: #2f6b5f;
  --green-deep: #224f45;
  --green-mid: #3c8071;
  --green-soft: #e6f1ec;
  --green-mist: #f0f7f3;
  --orange: #d56f3f;
  --orange-deep: #b9562c;
  --orange-soft: #fbe9dd;
  --red: #bd5145;
  --red-soft: #f9e8e5;
  --yellow: #d4a23e;
  --yellow-soft: #fbf2d9;
  --blue: #3d7b8f;
  --blue-soft: #e6f1f4;
  --purple: #7868a8;
  --purple-soft: #efecf7;
  --shadow-sm: 0 1px 2px rgba(35, 58, 49, 0.04), 0 4px 12px rgba(35, 58, 49, 0.035);
  --shadow: 0 2px 4px rgba(35, 58, 49, 0.035), 0 14px 38px rgba(35, 58, 49, 0.07);
  --shadow-lg: 0 24px 70px rgba(28, 52, 44, 0.16);
  --r-xs: 10px;
  --r-sm: 14px;
  --r-md: 18px;
  --r-lg: 24px;
  --r-xl: 30px;
  --font-sans: "Inter", "SF Pro Text", -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-serif: "Iowan Old Style", "Songti SC", "STSong", "Noto Serif SC", Georgia, "SimSun", serif;
  --font-mono: "Cascadia Code", "SFMono-Regular", "Consolas", "Liberation Mono", monospace;
  --tab-h: 72px;
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.65;
  background-color: var(--bg);
  background-image:
    radial-gradient(circle at 8% -5%, rgba(213, 111, 63, 0.09), transparent 32%),
    radial-gradient(circle at 96% 10%, rgba(47, 107, 95, 0.085), transparent 30%),
    radial-gradient(circle at 50% 100%, rgba(212, 162, 62, 0.05), transparent 36%),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='28' height='28' viewBox='0 0 28 28'%3E%3Ccircle cx='1.2' cy='1.2' r='1.2' fill='%232f6b5f' fill-opacity='.045'/%3E%3C/svg%3E");
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overscroll-behavior-y: none;
}

body.modal-open { overflow: hidden; }

button, input, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; }
button, a { -webkit-tap-highlight-color: transparent; touch-action: manipulation; }
a { color: var(--green); text-decoration: none; }
img { max-width: 100%; display: block; }
p, h1, h2, h3, h4, ul, ol { margin-top: 0; }
ul, ol { padding-left: 1.2em; }
svg { flex: none; }

::selection { background: #d7e8df; color: var(--green-deep); }

:focus-visible {
  outline: 3px solid rgba(213, 111, 63, 0.55);
  outline-offset: 3px;
  border-radius: 6px;
}

.sr-only {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0);
  white-space: nowrap; border: 0;
}

.icon { width: 20px; height: 20px; }
.icon--sm { width: 16px; height: 16px; }
.icon--lg { width: 26px; height: 26px; }

/* ---------------- 启动画面 ---------------- */
.boot {
  position: fixed; inset: 0; z-index: 300;
  display: grid; place-content: center; justify-items: center;
  background: #f4f0e7;
  background-image: radial-gradient(circle at 50% 35%, rgba(47, 107, 95, 0.09), transparent 40%);
  transition: opacity 0.4s ease, visibility 0.4s ease;
}
.boot.is-hidden { opacity: 0; visibility: hidden; pointer-events: none; }
.boot__mark {
  width: 72px; height: 72px; border-radius: 22px;
  background: var(--green); color: #fffaf0;
  display: flex; align-items: center; justify-content: center; gap: 1px;
  font-family: var(--font-serif); font-weight: 800; font-size: 30px;
  box-shadow: 0 14px 30px rgba(34, 79, 69, 0.22);
  transform: rotate(-4deg);
}
.boot__x { color: #ffb68e; transform: translateY(-4px); }
.boot__check { transform: translateY(4px) rotate(4deg); }
.boot__name {
  margin-top: 20px; font-size: 22px; font-weight: 800; letter-spacing: 0.08em;
}
.boot p { margin-top: 8px; color: var(--muted); font-size: 13px; letter-spacing: 0.04em; }
.boot__line {
  width: 130px; height: 3px; margin-top: 26px; overflow: hidden; border-radius: 99px;
  background: rgba(47, 107, 95, 0.12);
}
.boot__line i {
  display: block; width: 45%; height: 100%; border-radius: inherit;
  background: linear-gradient(90deg, var(--orange), var(--green));
  animation: boot-slide 1.1s ease-in-out infinite alternate;
}
@keyframes boot-slide { from { transform: translateX(-20%); } to { transform: translateX(150%); } }

.app { min-height: 100dvh; }
.app.is-ready { animation: app-in 0.45s ease both; }
@keyframes app-in { from { opacity: 0; } to { opacity: 1; } }

/* ---------------- 布局 ---------------- */
.shell {
  display: grid;
  grid-template-columns: 252px minmax(0, 1fr);
  min-height: 100dvh;
}

.sidebar {
  position: sticky; top: 0; height: 100dvh;
  display: flex; flex-direction: column;
  padding: 28px 18px 18px;
  border-right: 1px solid rgba(215, 205, 187, 0.75);
  background: rgba(250, 247, 238, 0.76);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  z-index: 30;
}
.brand {
  display: flex; align-items: center; gap: 12px;
  padding: 0 8px 26px;
  color: var(--ink);
}
.brand:hover { color: var(--ink); }
.logo-mark {
  width: 43px; height: 43px; border-radius: 13px;
  display: flex; align-items: center; justify-content: center; gap: 1px;
  background: var(--green); color: #fffaf0;
  font-family: var(--font-serif); font-weight: 800; font-size: 17px;
  line-height: 1;
  box-shadow: 0 7px 15px rgba(34, 79, 69, 0.18);
  transform: rotate(-3deg);
  flex: none;
}
.logo-mark span { display: inline-block; }
.logo-mark .logo-x { color: #ffbc96; transform: translateY(-2px); }
.logo-mark .logo-check { transform: translateY(2px); }
.brand__text { display: flex; flex-direction: column; line-height: 1.25; }
.brand__text b { font-size: 16px; letter-spacing: 0.03em; }
.brand__text small { margin-top: 4px; color: var(--muted); font-size: 11px; letter-spacing: 0.07em; }

.side-label {
  padding: 0 12px; margin: 2px 0 8px;
  color: var(--muted-2); font-size: 10px; font-weight: 700;
  letter-spacing: 0.18em;
}
.nav-list { display: flex; flex-direction: column; gap: 4px; }
.nav-item {
  display: flex; align-items: center; gap: 12px;
  min-height: 45px; padding: 0 13px;
  border-radius: 13px; color: var(--ink-2);
  font-size: 14px; font-weight: 600;
  transition: background 0.18s ease, color 0.18s ease, transform 0.18s ease;
}
.nav-item:hover { background: rgba(47, 107, 95, 0.07); color: var(--green-deep); }
.nav-item.active {
  background: var(--green); color: #fffaf0;
  box-shadow: 0 8px 18px rgba(34, 79, 69, 0.16);
}
.nav-item.active .nav-badge { background: rgba(255, 255, 255, 0.2); color: #fffaf0; }
.nav-item .icon { width: 19px; height: 19px; opacity: 0.9; }
.nav-badge {
  margin-left: auto; min-width: 21px; height: 21px;
  display: inline-flex; align-items: center; justify-content: center;
  padding: 0 6px; border-radius: 99px;
  background: var(--orange-soft); color: var(--orange-deep);
  font-size: 10px; font-weight: 800;
}
.sidebar__spacer { flex: 1; }
.sidebar__note {
  margin: 18px 4px 14px;
  padding: 16px;
  border-radius: 17px;
  background: linear-gradient(145deg, #f9e5d7, #fdf3e9);
  border: 1px solid #f1d8c5;
}
.sidebar__note .mini-label { color: var(--orange-deep); }
.sidebar__note p { margin: 5px 0 11px; color: #7b5845; font-size: 12px; line-height: 1.55; }
.sidebar__note .btn { width: 100%; min-height: 38px; font-size: 12px; }
.side-user {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 10px 4px; border-top: 1px solid var(--line);
}
.avatar {
  width: 36px; height: 36px; border-radius: 50%;
  display: grid; place-items: center;
  background: var(--green-soft); color: var(--green-deep);
  font-weight: 800; font-size: 13px;
  flex: none;
}
.side-user__meta { min-width: 0; }
.side-user__meta b { display: block; font-size: 13px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.side-user__meta small { display: block; color: var(--muted); font-size: 10px; }
.side-user .icon-btn { margin-left: auto; width: 34px; height: 34px; }

.main { min-width: 0; position: relative; }
.view {
  width: 100%; max-width: 1140px;
  margin: 0 auto;
  padding: 34px 38px 90px;
}
.view--wide { max-width: 1220px; }
.view--narrow { max-width: 880px; }

.mobile-topbar {
  display: none;
  position: sticky; top: 0; z-index: 40;
  align-items: center; justify-content: space-between;
  height: calc(58px + env(safe-area-inset-top, 0px));
  padding: env(safe-area-inset-top, 0px) 17px 0;
  background: rgba(244, 240, 231, 0.84);
  border-bottom: 1px solid rgba(215, 205, 187, 0.6);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}
.mobile-topbar .brand { padding: 0; gap: 9px; }
.mobile-topbar .logo-mark { width: 34px; height: 34px; border-radius: 10px; font-size: 14px; }
.mobile-topbar .brand__text b { font-size: 14px; }
.mobile-topbar .brand__text small { display: none; }
.topbar-actions { display: flex; align-items: center; gap: 4px; }

.tabbar {
  display: none;
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 50;
  height: calc(var(--tab-h) + var(--safe-bottom));
  padding: 8px 8px var(--safe-bottom);
  background: rgba(255, 253, 247, 0.94);
  border-top: 1px solid rgba(215, 205, 187, 0.75);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 -10px 30px rgba(35, 58, 49, 0.045);
}
.tabbar__inner {
  display: grid; grid-template-columns: repeat(5, 1fr);
  max-width: 620px; margin: 0 auto; height: 100%;
}
.tab-item {
  position: relative;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 3px; border: 0; background: transparent;
  color: #8a948d; font-size: 10px; font-weight: 600;
  border-radius: 12px;
}
.tab-item .icon { width: 22px; height: 22px; }
.tab-item.active { color: var(--green-deep); }
.tab-item.active::after {
  content: ""; position: absolute; bottom: 3px;
  width: 4px; height: 4px; border-radius: 50%; background: var(--orange);
}
.tab-item--capture { color: var(--orange-deep); }
.tab-item--capture .tab-camera {
  width: 48px; height: 48px; border-radius: 50%;
  display: grid; place-items: center; margin-top: -26px;
  background: var(--orange); color: #fff9f2;
  border: 4px solid var(--bg);
  box-shadow: 0 8px 18px rgba(181, 86, 44, 0.3);
}
.tab-item--capture .tab-camera .icon { width: 22px; height: 22px; }
.tab-item--capture.active::after { display: none; }
.tab-item--capture span:last-child { margin-top: 1px; }

/* ---------------- 基础排版 / 组件 ---------------- */
.page-head {
  display: flex; align-items: flex-end; justify-content: space-between;
  gap: 18px; margin-bottom: 24px;
}
.page-head__copy { min-width: 0; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  color: var(--orange-deep); font-size: 11px; font-weight: 800;
  letter-spacing: 0.14em; text-transform: uppercase;
}
.eyebrow::before {
  content: ""; width: 18px; height: 1.5px; background: currentColor; opacity: 0.55;
}
.eyebrow--green { color: var(--green); }
.page-head h1 {
  margin: 7px 0 0; font-size: clamp(25px, 3vw, 33px);
  line-height: 1.25; letter-spacing: -0.02em; font-weight: 800;
  text-wrap: balance;
}
.page-head p { margin: 7px 0 0; color: var(--muted); font-size: 13px; }
.page-actions { display: flex; align-items: center; gap: 9px; flex-wrap: wrap; justify-content: flex-end; }

.card {
  background: var(--paper);
  border: 1px solid rgba(224, 216, 201, 0.85);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-sm);
}
.card--flat { box-shadow: none; }
.card--pad { padding: 22px; }
.card--cream { background: var(--paper-2); }
.section-head {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px; margin-bottom: 14px;
}
.section-head h2 { margin: 0; font-size: 16px; font-weight: 800; letter-spacing: -0.01em; }
.section-head p { margin: 2px 0 0; color: var(--muted); font-size: 12px; }
.section-head a, .link-more {
  display: inline-flex; align-items: center; gap: 4px;
  color: var(--green); font-size: 12px; font-weight: 700; white-space: nowrap;
}
.link-more .icon { width: 15px; height: 15px; }
.mini-label {
  color: var(--muted); font-size: 10px; font-weight: 800;
  letter-spacing: 0.12em; text-transform: uppercase;
}
.muted { color: var(--muted); }
.small { font-size: 12px; }
.tiny { font-size: 11px; }
.strong { font-weight: 800; }
.serif { font-family: var(--font-serif); }
.nowrap { white-space: nowrap; }
.text-green { color: var(--green); }
.text-orange { color: var(--orange-deep); }
.text-red { color: var(--red); }
.text-muted { color: var(--muted); }
.divider { height: 1px; background: var(--line); border: 0; margin: 18px 0; }
.stack-8 > * + * { margin-top: 8px; }
.stack-12 > * + * { margin-top: 12px; }
.stack-18 > * + * { margin-top: 18px; }
.row { display: flex; align-items: center; gap: 10px; }
.row--between { justify-content: space-between; }
.row--wrap { flex-wrap: wrap; }
.grow { flex: 1; min-width: 0; }
.hide-mobile { display: initial; }

/* 按钮 */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 44px; padding: 0 19px;
  border: 1px solid transparent; border-radius: 999px;
  font-size: 13px; font-weight: 750; line-height: 1.2;
  text-align: center; white-space: nowrap;
  transition: transform 0.15s ease, background 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn .icon { width: 18px; height: 18px; }
.btn--primary {
  background: var(--green); color: #fffaf0;
  box-shadow: 0 7px 16px rgba(34, 79, 69, 0.16);
}
.btn--primary:hover { background: var(--green-deep); }
.btn--accent {
  background: var(--orange); color: #fffaf0;
  box-shadow: 0 7px 16px rgba(181, 86, 44, 0.2);
}
.btn--accent:hover { background: var(--orange-deep); }
.btn--soft { background: var(--green-soft); color: var(--green-deep); }
.btn--soft:hover { background: #d9ebe3; }
.btn--orange-soft { background: var(--orange-soft); color: var(--orange-deep); }
.btn--ghost {
  background: rgba(255, 253, 247, 0.7); color: var(--ink-2);
  border-color: var(--line-strong);
}
.btn--ghost:hover { border-color: var(--green); color: var(--green); }
.btn--danger { background: var(--red); color: #fff; }
.btn--danger-ghost { background: transparent; color: var(--red); border-color: #ecc7c2; }
.btn--text { padding: 0 8px; min-height: 36px; background: transparent; color: var(--green); }
.btn--sm { min-height: 36px; padding: 0 14px; font-size: 12px; }
.btn--xs { min-height: 30px; padding: 0 11px; font-size: 11px; }
.btn--lg { min-height: 52px; padding: 0 25px; font-size: 14px; }
.btn--block { width: 100%; }
.btn[disabled], .btn.is-disabled { opacity: 0.48; pointer-events: none; }

.icon-btn {
  width: 40px; height: 40px; display: inline-grid; place-items: center;
  border: 1px solid transparent; border-radius: 50%;
  background: transparent; color: var(--ink-2);
  transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}
.icon-btn:hover { background: rgba(47, 107, 95, 0.08); color: var(--green-deep); }
.icon-btn .icon { width: 20px; height: 20px; }
.icon-btn--bordered { border-color: var(--line); background: var(--paper); }
.icon-btn--danger:hover { background: var(--red-soft); color: var(--red); }

.back-btn {
  display: inline-flex; align-items: center; gap: 7px;
  min-height: 38px; padding: 0 13px 0 9px;
  border-radius: 999px; border: 1px solid var(--line);
  background: rgba(255, 253, 247, 0.7);
  color: var(--ink-2); font-size: 12px; font-weight: 700;
}
.back-btn:hover { border-color: var(--green); color: var(--green); }

/* 徽标 / 状态 */
.pill {
  display: inline-flex; align-items: center; gap: 4px;
  height: 24px; padding: 0 9px; border-radius: 999px;
  font-size: 10px; font-weight: 750; line-height: 1;
  background: var(--paper-2); color: var(--muted);
  border: 1px solid var(--line);
  white-space: nowrap;
}
.pill .icon { width: 12px; height: 12px; }
.pill--green { background: var(--green-soft); color: var(--green-deep); border-color: transparent; }
.pill--orange { background: var(--orange-soft); color: var(--orange-deep); border-color: transparent; }
.pill--red { background: var(--red-soft); color: var(--red); border-color: transparent; }
.pill--yellow { background: var(--yellow-soft); color: #8d6616; border-color: transparent; }
.pill--blue { background: var(--blue-soft); color: #2d6476; border-color: transparent; }
.pill--violet { background: var(--purple-soft); color: #5f4c93; border-color: transparent; }
.pill--gray { background: #f0efeb; color: var(--muted); border-color: transparent; }
.pill--topic { background: var(--topic-soft, var(--green-soft)); color: var(--topic, var(--green)); border-color: transparent; }
.pill--due { background: var(--orange-soft); color: var(--orange-deep); border-color: transparent; }
.pill--done { background: var(--green-soft); color: var(--green-deep); border-color: transparent; }

.difficulty { display: inline-flex; align-items: center; gap: 6px; color: var(--muted); font-size: 10px; }
.dots { display: inline-flex; gap: 2.5px; }
.dots i { width: 5px; height: 5px; border-radius: 50%; background: #ddd5c7; }
.dots i.on { background: var(--orange); }
.dots--green i.on { background: var(--green); }

/* 表单 */
.field { display: flex; flex-direction: column; gap: 7px; }
.field > label, .field-label {
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
  color: var(--ink-2); font-size: 12px; font-weight: 750;
}
.field > label .req { color: var(--orange); }
.field-hint { color: var(--muted-2); font-size: 10px; font-weight: 500; }
.input, .textarea, .select {
  width: 100%;
  min-height: 44px; padding: 10px 13px;
  border: 1.5px solid var(--line);
  border-radius: var(--r-sm);
  background: #fffefa; color: var(--ink);
  font-size: 15px; line-height: 1.65;
  transition: border-color 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
  -webkit-appearance: none; appearance: none;
}
.textarea { min-height: 110px; resize: vertical; }
.textarea--tall { min-height: 150px; }
.textarea--short { min-height: 78px; }
.input::placeholder, .textarea::placeholder { color: #b3b8b1; }
.input:focus, .textarea:focus, .select:focus {
  outline: none; border-color: var(--green-mid);
  box-shadow: 0 0 0 4px rgba(47, 107, 95, 0.09);
  background: #fff;
}
.input--error { border-color: var(--red); box-shadow: 0 0 0 4px rgba(189, 81, 69, 0.08); }
.select {
  padding-right: 36px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2378847c' stroke-width='2' stroke-linecap='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
}
.input-icon { position: relative; }
.input-icon > .icon {
  position: absolute; left: 13px; top: 50%; transform: translateY(-50%);
  width: 17px; height: 17px; color: var(--muted);
  pointer-events: none;
}
.input-icon .input { padding-left: 40px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }
.form-grid .span-2 { grid-column: 1 / -1; }
.form-section + .form-section { margin-top: 26px; padding-top: 24px; border-top: 1px dashed var(--line-strong); }
.form-section__head { display: flex; align-items: center; gap: 10px; margin-bottom: 15px; }
.form-section__num {
  width: 25px; height: 25px; border-radius: 8px;
  display: grid; place-items: center;
  background: var(--green-soft); color: var(--green-deep);
  font-family: var(--font-serif); font-size: 13px; font-weight: 800;
  flex: none;
}
.form-section__head h3 { margin: 0; font-size: 14px; }
.form-section__head p { margin: 1px 0 0; color: var(--muted); font-size: 11px; }
.form-actions {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  margin-top: 22px; padding-top: 18px; border-top: 1px solid var(--line);
}
.form-actions__right { display: flex; align-items: center; gap: 9px; }

.switch { position: relative; display: inline-flex; width: 46px; height: 27px; flex: none; }
.switch input { position: absolute; opacity: 0; width: 100%; height: 100%; margin: 0; cursor: pointer; z-index: 2; }
.switch span {
  width: 100%; height: 100%; border-radius: 99px;
  background: #d9d6ce; transition: background 0.2s ease;
}
.switch span::after {
  content: ""; position: absolute; top: 3px; left: 3px;
  width: 21px; height: 21px; border-radius: 50%;
  background: #fff; box-shadow: 0 2px 4px rgba(0,0,0,.15);
  transition: transform 0.2s ease;
}
.switch input:checked + span { background: var(--green); }
.switch input:checked + span::after { transform: translateX(19px); }
.switch input:focus-visible + span { outline: 3px solid rgba(213, 111, 63, 0.4); outline-offset: 2px; }

.choice-group { display: flex; flex-wrap: wrap; gap: 7px; }
.choice {
  position: relative; display: inline-flex; align-items: center; gap: 5px;
  min-height: 34px; padding: 0 12px;
  border: 1.5px solid var(--line); border-radius: 99px;
  background: #fffefa; color: var(--ink-2);
  font-size: 12px; font-weight: 650;
  transition: all 0.16s ease;
}
.choice:hover { border-color: var(--green-mid); }
.choice input { position: absolute; opacity: 0; pointer-events: none; }
.choice:has(input:checked) {
  border-color: var(--green); background: var(--green-soft); color: var(--green-deep);
}
.choice:has(input:checked)::before {
  content: "✓"; font-size: 10px; font-weight: 900;
}
.choice--reason:has(input:checked) { border-color: var(--orange); background: var(--orange-soft); color: var(--orange-deep); }
.difficulty-picker { display: grid; grid-template-columns: repeat(5, 1fr); gap: 7px; }
.difficulty-picker .choice { justify-content: center; flex-direction: column; gap: 2px; padding: 7px 4px; }
.difficulty-picker .choice small { font-size: 9px; color: var(--muted); font-weight: 500; }
.difficulty-picker .choice:has(input:checked) small { color: var(--green); }

.symbol-bar {
  display: flex; align-items: center; gap: 4px;
  padding: 5px; border: 1px solid var(--line);
  border-radius: 12px; background: var(--paper-2);
  overflow-x: auto; scrollbar-width: none;
}
.symbol-bar::-webkit-scrollbar { display: none; }
.symbol-bar span { color: var(--muted-2); font-size: 9px; padding: 0 5px; white-space: nowrap; }
.symbol-bar button {
  flex: none; width: 33px; height: 31px;
  border: 0; border-radius: 8px; background: #fffdf8;
  color: var(--ink-2); font-family: var(--font-serif); font-size: 14px;
  box-shadow: 0 1px 2px rgba(35,58,49,.04);
}
.symbol-bar button:hover { background: var(--green-soft); color: var(--green-deep); }

/* 图片 */
.thumb {
  width: 100%; height: 100%; object-fit: cover; display: block;
  background: var(--paper-2);
}
.img-shell {
  position: relative; overflow: hidden; border-radius: var(--r-md);
  background: #f1ebdf;
}

/* 空状态 */
.empty {
  padding: 44px 22px; text-align: center;
  border: 1.5px dashed var(--line-strong); border-radius: var(--r-lg);
  background: rgba(255, 253, 247, 0.46);
}
.empty__icon {
  width: 62px; height: 62px; margin: 0 auto 15px;
  display: grid; place-items: center;
  border-radius: 20px; background: var(--green-soft); color: var(--green);
  transform: rotate(-4deg);
}
.empty__icon .icon { width: 28px; height: 28px; }
.empty h3 { margin: 0 0 6px; font-size: 17px; }
.empty p { max-width: 360px; margin: 0 auto 18px; color: var(--muted); font-size: 12px; }
.empty__actions { display: flex; gap: 9px; justify-content: center; flex-wrap: wrap; }

/* 进度条 */
.progress { height: 7px; border-radius: 99px; background: #ece7dc; overflow: hidden; }
.progress > i {
  display: block; height: 100%; border-radius: inherit;
  background: var(--green); transition: width 0.35s ease;
}
.progress--orange > i { background: var(--orange); }
.progress--thin { height: 4px; }

/* 提示条 */
.notice {
  display: flex; align-items: flex-start; gap: 10px;
  padding: 13px 15px; border-radius: var(--r-sm);
  background: var(--yellow-soft); border: 1px solid #f0dfb4;
  color: #74541a; font-size: 12px; line-height: 1.65;
}
.notice .icon { width: 17px; height: 17px; margin-top: 1px; }
.notice--green { background: var(--green-soft); border-color: #cfe5db; color: var(--green-deep); }
.notice--orange { background: var(--orange-soft); border-color: #f2d6c3; color: #7e492f; }

/* ---------------- 首页 ---------------- */
.home-hero {
  position: relative; overflow: hidden;
  display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(200px, 0.65fr);
  gap: 18px; align-items: center;
  min-height: 252px;
  padding: 33px 36px;
  border-radius: var(--r-xl);
  background:
    radial-gradient(circle at 88% 20%, rgba(255, 210, 150, 0.22), transparent 35%),
    linear-gradient(128deg, #204a40 0%, #2b6155 55%, #347667 100%);
  color: #fff9ee;
  box-shadow: 0 20px 48px rgba(29, 65, 56, 0.16);
}
.home-hero::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: linear-gradient(to right, transparent, #000 40%, #000);
  pointer-events: none;
}
.hero-math {
  position: absolute; color: rgba(255, 250, 240, 0.13);
  font-family: var(--font-serif); font-weight: 700; pointer-events: none; user-select: none;
}
.hero-math--1 { top: 30px; right: 24%; font-size: 28px; transform: rotate(-9deg); }
.hero-math--2 { bottom: 18px; left: 44%; font-size: 22px; transform: rotate(7deg); }
.hero-math--3 { top: 48%; right: 3%; font-size: 44px; transform: rotate(12deg); opacity: .5; }
.hero-copy { position: relative; z-index: 2; }
.hero-kicker {
  display: inline-flex; align-items: center; gap: 7px;
  margin-bottom: 13px;
  padding: 5px 10px 5px 7px;
  border: 1px solid rgba(255,255,255,.16);
  border-radius: 99px; background: rgba(255,255,255,.08);
  color: #f7e4c9; font-size: 10px; font-weight: 700; letter-spacing: .08em;
}
.hero-kicker .dot { width: 5px; height: 5px; border-radius: 50%; background: #f3bd72; box-shadow: 0 0 0 3px rgba(243,189,114,.12); }
.home-hero h1 {
  margin: 0 0 11px;
  font-size: clamp(28px, 3.6vw, 43px);
  line-height: 1.25; letter-spacing: -0.03em; font-weight: 850;
}
.home-hero h1 .accent {
  position: relative; color: #ffcf9f; white-space: nowrap;
}
.home-hero h1 .accent::after {
  content: ""; position: absolute; left: 1px; right: 0; bottom: -2px; height: 5px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='8' viewBox='0 0 120 8'%3E%3Cpath d='M2 5c30-4 67-4 116 0' fill='none' stroke='%23e59a62' stroke-width='2.2' stroke-linecap='round'/%3E%3C/svg%3E") center/100% 100% no-repeat;
  opacity: .82;
}
.home-hero .hero-sub {
  max-width: 420px; margin: 0 0 20px;
  color: rgba(255, 249, 238, 0.7); font-size: 13px; line-height: 1.75;
}
.hero-actions { display: flex; align-items: center; gap: 9px; flex-wrap: wrap; }
.home-hero .btn--primary { background: #fff8ec; color: var(--green-deep); box-shadow: 0 8px 18px rgba(0,0,0,.12); }
.home-hero .btn--primary:hover { background: #fff; }
.home-hero .btn--ghost { background: rgba(255,255,255,.06); color: #fff6e8; border-color: rgba(255,255,255,.23); }
.home-hero .btn--ghost:hover { background: rgba(255,255,255,.12); border-color: rgba(255,255,255,.45); }
.hero-art { position: relative; z-index: 2; display: flex; justify-content: center; }
.hero-art svg { width: min(100%, 250px); height: auto; filter: drop-shadow(0 16px 24px rgba(0,0,0,.12)); }

.home-stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px;
  margin-top: 17px;
}
.stat-card {
  background: rgba(255, 253, 247, 0.82);
  border: 1px solid rgba(224, 216, 201, 0.8);
  border-radius: var(--r-md);
  padding: 16px 17px;
  box-shadow: var(--shadow-sm);
  min-width: 0;
}
.stat-card__top { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.stat-card__icon {
  width: 31px; height: 31px; border-radius: 10px;
  display: grid; place-items: center;
  background: var(--green-soft); color: var(--green);
}
.stat-card__icon .icon { width: 16px; height: 16px; }
.stat-card:nth-child(2) .stat-card__icon { background: var(--orange-soft); color: var(--orange-deep); }
.stat-card:nth-child(3) .stat-card__icon { background: var(--yellow-soft); color: #9a7118; }
.stat-card:nth-child(4) .stat-card__icon { background: var(--blue-soft); color: var(--blue); }
.stat-card__num {
  margin-top: 6px; font-family: var(--font-serif);
  font-size: 29px; line-height: 1.1; font-weight: 800; letter-spacing: -0.02em;
}
.stat-card__num small { margin-left: 2px; font-family: var(--font-sans); font-size: 12px; color: var(--muted); font-weight: 600; }
.stat-card__label { color: var(--muted); font-size: 10px; margin-top: 2px; }
.stat-card__delta { font-size: 9px; color: var(--green); font-weight: 700; }

.home-grid {
  display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(280px, .75fr);
  gap: 17px; margin-top: 17px;
}
.home-col { display: flex; flex-direction: column; gap: 17px; min-width: 0; }

.daily-card {
  position: relative; overflow: hidden;
  padding: 23px;
  background:
    radial-gradient(circle at 100% 0%, rgba(213, 111, 63, 0.11), transparent 35%),
    linear-gradient(150deg, #fffdf8, #fcf7ea);
}
.daily-card__head { display: flex; align-items: flex-start; justify-content: space-between; gap: 14px; }
.daily-card h2 { margin: 2px 0 3px; font-size: 21px; letter-spacing: -0.02em; }
.daily-card h2 strong { font-family: var(--font-serif); font-size: 32px; color: var(--green); margin-right: 2px; }
.daily-card__sub { margin: 0; color: var(--muted); font-size: 12px; }
.goal-ring {
  --v: 0;
  position: relative; width: 58px; height: 58px; flex: none;
  border-radius: 50%;
  background: conic-gradient(var(--orange) calc(var(--v) * 1%), #ece5d8 0);
  display: grid; place-items: center;
}
.goal-ring::before { content: ""; position: absolute; inset: 5px; background: #fffdf8; border-radius: 50%; }
.goal-ring span { position: relative; z-index: 1; font-size: 10px; font-weight: 800; color: var(--green-deep); }
.goal-ring small { position: absolute; z-index: 1; bottom: 9px; font-size: 7px; color: var(--muted); }
.daily-preview { display: flex; flex-direction: column; gap: 6px; margin: 17px 0; }
.due-item {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 10px; border-radius: 11px;
  background: rgba(255,255,255,.56); border: 1px solid #f0e7d7;
  transition: background .16s ease;
}
.due-item:hover { background: #fff; }
.due-item__dot {
  width: 24px; height: 24px; border-radius: 8px; flex: none;
  display: grid; place-items: center;
  background: var(--topic-soft, var(--green-soft)); color: var(--topic, var(--green));
  font-size: 12px; font-weight: 800;
}
.due-item__body { min-width: 0; flex: 1; }
.due-item__body b { display: block; font-size: 11px; font-weight: 700; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.due-item__body small { display: block; color: var(--muted); font-size: 10px; }
.due-item .icon { width: 14px; height: 14px; color: var(--muted-2); }
.daily-card__actions { display: flex; align-items: center; gap: 9px; flex-wrap: wrap; }
.daily-done {
  display: flex; align-items: center; gap: 13px;
  padding: 13px; margin: 17px 0;
  border-radius: 14px; background: var(--green-soft);
}
.daily-done__icon {
  width: 40px; height: 40px; border-radius: 50%;
  display: grid; place-items: center; flex: none;
  background: var(--green); color: #fff;
}
.daily-done__icon .icon { width: 21px; height: 21px; }
.daily-done b { display: block; font-size: 13px; color: var(--green-deep); }
.daily-done small { color: #5c7e72; font-size: 11px; }

.capture-mini {
  position: relative; overflow: hidden;
  padding: 21px;
  background: linear-gradient(150deg, #fce9da, #fdf5e9);
  border-color: #f1d6c1;
}
.capture-mini::after {
  content: ""; position: absolute; right: -24px; bottom: -28px;
  width: 120px; height: 120px; border-radius: 30px;
  border: 1.5px dashed rgba(181, 86, 44, 0.22);
  transform: rotate(14deg);
}
.capture-mini__icon {
  width: 45px; height: 45px; border-radius: 14px;
  display: grid; place-items: center;
  background: var(--orange); color: #fff8f0;
  box-shadow: 0 8px 17px rgba(181, 86, 44, 0.2);
  margin-bottom: 14px;
}
.capture-mini h2 { margin: 0 0 4px; font-size: 17px; }
.capture-mini p { margin: 0 0 16px; color: #865f49; font-size: 11px; line-height: 1.6; }
.capture-mini .btn { position: relative; z-index: 1; }

.weak-card { padding: 21px 23px; }
.weak-row { display: grid; grid-template-columns: 1fr auto; gap: 5px 10px; align-items: center; }
.weak-row + .weak-row { margin-top: 12px; }
.weak-row__name { display: flex; align-items: center; gap: 7px; font-size: 12px; font-weight: 650; min-width: 0; }
.weak-row__name i { width: 7px; height: 7px; border-radius: 2px; background: var(--topic); flex: none; }
.weak-row__name span { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.weak-row__count { color: var(--muted); font-size: 10px; }
.weak-row .progress { grid-column: 1 / -1; }
.weak-empty { color: var(--muted); font-size: 12px; padding: 6px 0; }

.tip-card {
  padding: 20px 21px;
  background: linear-gradient(145deg, #edf5ef, #f8fbf7);
  border-color: #d9e8df;
}
.tip-card .mini-label { color: var(--green); }
.tip-card blockquote {
  margin: 9px 0 13px;
  font-family: var(--font-serif); font-size: 17px; line-height: 1.65;
  color: var(--green-deep);
}
.tip-card__foot { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.tip-card__foot span { color: var(--muted); font-size: 10px; }
.tip-card__foot a { font-size: 11px; font-weight: 700; display: inline-flex; align-items: center; gap: 3px; }

.recent-card { grid-column: 1 / -1; padding: 21px 23px; }
.recent-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.mini-q {
  position: relative;
  display: flex; gap: 11px; padding: 12px;
  border: 1px solid var(--line); border-radius: 14px;
  background: #fffefa; min-width: 0;
  transition: border-color .18s ease, transform .18s ease, box-shadow .18s ease;
}
.mini-q:hover { border-color: var(--line-strong); transform: translateY(-2px); box-shadow: var(--shadow-sm); }
.mini-q__body { min-width: 0; flex: 1; }
.mini-q__meta { display: flex; align-items: center; gap: 5px; margin-bottom: 4px; }
.mini-q__stem {
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
  font-size: 12px; line-height: 1.55; color: var(--ink-2);
}
.mini-q__date { margin-top: 6px; color: var(--muted-2); font-size: 9px; }
.mini-q__thumb { width: 50px; height: 50px; border-radius: 9px; overflow: hidden; flex: none; }
.mini-q__thumb img { width: 100%; height: 100%; object-fit: cover; }
.q-thumb-fallback {
  width: 100%; height: 100%; display: grid; place-items: center;
  background: var(--topic-soft, var(--green-soft)); color: var(--topic, var(--green));
  font-family: var(--font-serif); font-size: 17px; font-weight: 800;
}

.empty-home {
  padding: 27px 30px 30px;
  background:
    radial-gradient(circle at 90% 10%, rgba(213, 111, 63, 0.1), transparent 40%),
    linear-gradient(150deg, #fffdf8, #fbf5e8);
}
.empty-home__top { display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.empty-home h2 { margin: 3px 0 7px; font-size: 22px; letter-spacing: -0.02em; }
.empty-home p { max-width: 520px; margin: 0; color: var(--muted); font-size: 12px; }
.steps-3 {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 9px;
  margin-top: 20px;
}
.step-card {
  padding: 13px;
  border-radius: 13px; background: rgba(255,255,255,.62); border: 1px solid var(--line);
}
.step-card b { display: flex; align-items: center; gap: 6px; font-size: 12px; }
.step-card b span {
  width: 18px; height: 18px; border-radius: 6px;
  display: grid; place-items: center; flex: none;
  background: var(--green); color: #fff; font-size: 9px;
}
.step-card p { margin: 5px 0 0; font-size: 10px; line-height: 1.55; color: var(--muted); }
.empty-home__actions { display: flex; gap: 9px; flex-wrap: wrap; margin-top: 17px; }

/* ---------------- 错题库 ---------------- */
.bank-tools {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; gap: 9px;
  padding: 9px 0 12px;
  background: linear-gradient(to bottom, var(--bg) 70%, rgba(244,240,231,0));
}
.bank-search { flex: 1; min-width: 0; }
.bank-search .input { background: rgba(255, 253, 247, 0.82); }
.bank-sort { width: 124px; flex: none; }
.bank-sort .select { min-height: 44px; font-size: 12px; padding-left: 11px; }
.filter-scroll {
  display: flex; gap: 6px; overflow-x: auto;
  padding: 2px 0 12px; scrollbar-width: none;
}
.filter-scroll::-webkit-scrollbar { display: none; }
.filter-chip {
  flex: none; min-height: 32px; padding: 0 12px;
  border: 1px solid var(--line); border-radius: 99px;
  background: rgba(255, 253, 247, 0.64); color: var(--ink-2);
  font-size: 11px; font-weight: 650;
  display: inline-flex; align-items: center; gap: 5px;
}
.filter-chip:hover { border-color: var(--green-mid); }
.filter-chip.active { background: var(--green); border-color: var(--green); color: #fffaf0; }
.filter-chip .count { opacity: .65; font-size: 9px; }
.filter-chip--status.active { background: var(--orange); border-color: var(--orange); }
.bank-meta {
  display: flex; align-items: center; justify-content: space-between;
  gap: 10px; margin: 2px 0 12px; color: var(--muted); font-size: 11px;
}
.bank-meta b { color: var(--ink); font-weight: 800; }
.question-list { display: grid; grid-template-columns: 1fr; gap: 10px; }
.q-card {
  display: flex; align-items: stretch; gap: 15px;
  padding: 16px 17px;
  background: var(--paper); border: 1px solid rgba(224, 216, 201, 0.9);
  border-radius: var(--r-md);
  box-shadow: 0 1px 2px rgba(35,58,49,.025);
  transition: transform .18s ease, border-color .18s ease, box-shadow .18s ease;
  color: var(--ink);
}
.q-card:hover {
  transform: translateY(-2px);
  border-color: var(--line-strong);
  box-shadow: var(--shadow-sm);
  color: var(--ink);
}
.q-card__main { flex: 1; min-width: 0; }
.q-card__meta { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; margin-bottom: 7px; }
.q-card__stem {
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
  overflow: hidden; font-size: 14px; line-height: 1.65; color: var(--ink);
  letter-spacing: -0.005em;
}
.q-card__foot {
  display: flex; align-items: center; gap: 11px; flex-wrap: wrap;
  margin-top: 9px; color: var(--muted); font-size: 10px;
}
.q-card__foot span { display: inline-flex; align-items: center; gap: 4px; }
.q-card__foot .icon { width: 12px; height: 12px; }
.q-card__side { display: flex; flex-direction: column; align-items: flex-end; justify-content: space-between; gap: 8px; flex: none; }
.q-card__thumb {
  width: 75px; height: 75px; border-radius: 11px; overflow: hidden;
  border: 1px solid var(--line);
}
.q-card__thumb img { width: 100%; height: 100%; object-fit: cover; }
.q-status {
  display: inline-flex; align-items: center; gap: 4px;
  color: var(--muted); font-size: 9px; white-space: nowrap;
}
.q-status .dot { width: 5px; height: 5px; border-radius: 50%; background: var(--orange); }
.q-status--done .dot { background: var(--green); }
.q-status--due { color: var(--orange-deep); }

.bank-empty { margin-top: 10px; }
.bank-summary {
  display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
  margin-top: 18px; padding: 14px 16px;
  background: rgba(255, 253, 247, 0.55); border: 1px dashed var(--line-strong);
  border-radius: var(--r-sm); color: var(--muted); font-size: 11px;
}

/* ---------------- 错题详情 ---------------- */
.detail-top { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 18px; }
.detail-layout { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(270px, .72fr); gap: 17px; align-items: start; }
.detail-main { min-width: 0; display: flex; flex-direction: column; gap: 14px; }
.detail-side { display: flex; flex-direction: column; gap: 14px; position: sticky; top: 20px; }
.detail-card { padding: 23px; }
.detail-cat { display: flex; align-items: center; gap: 7px; flex-wrap: wrap; margin-bottom: 14px; }
.detail-stem {
  font-size: 18px; line-height: 1.9; color: var(--ink); letter-spacing: .005em;
  word-break: break-word;
}
.detail-photo {
  position: relative; margin-top: 18px;
  border-radius: 15px; overflow: hidden;
  border: 1px solid var(--line); background: var(--paper-2);
}
.detail-photo img { width: 100%; max-height: 520px; object-fit: contain; cursor: zoom-in; }
.detail-photo__hint {
  position: absolute; right: 9px; bottom: 8px;
  padding: 4px 8px; border-radius: 99px;
  background: rgba(25, 42, 36, .62); color: #fff; font-size: 9px;
  backdrop-filter: blur(4px);
}
.answer-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 18px; }
.answer-grid + .detail-section { margin-top: 20px; padding-top: 18px; border-top: 1px dashed var(--line); }
.answer-box { padding: 14px 15px; border-radius: 13px; border: 1px solid; min-width: 0; }
.answer-box--wrong { background: var(--red-soft); border-color: #efd2ce; }
.answer-box--right { background: var(--green-soft); border-color: #cee4da; }
.answer-box__label {
  display: flex; align-items: center; gap: 5px;
  font-size: 9px; font-weight: 800; letter-spacing: .09em;
  color: var(--red); margin-bottom: 5px;
}
.answer-box--right .answer-box__label { color: var(--green); }
.answer-box__text { font-size: 14px; line-height: 1.7; color: var(--ink); white-space: pre-wrap; word-break: break-word; }
.answer-box--empty .answer-box__text { color: var(--muted-2); font-size: 12px; }
.analysis-copy {
  margin: 0; font-size: 14px; line-height: 1.95; white-space: pre-wrap;
  color: var(--ink-2); word-break: break-word;
}
.detail-section + .detail-section { margin-top: 19px; padding-top: 18px; border-top: 1px dashed var(--line); }
.detail-section__head {
  display: flex; align-items: center; gap: 6px; margin-bottom: 9px;
  color: var(--muted); font-size: 10px; font-weight: 800; letter-spacing: .1em;
}
.detail-section__head .icon { width: 14px; height: 14px; color: var(--green); }
.tag-list { display: flex; flex-wrap: wrap; gap: 5px; }
.tag {
  display: inline-flex; align-items: center; min-height: 25px; padding: 0 9px;
  border-radius: 7px; background: #f4f0e6; color: #716a5d;
  font-size: 10px;
}
.detail-actions {
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
  padding: 15px; border-radius: var(--r-md); background: var(--paper); border: 1px solid var(--line);
}
.detail-actions .btn { flex: 1; min-width: 100px; }
.meta-row {
  display: flex; align-items: flex-start; justify-content: space-between; gap: 10px;
  padding: 10px 0; border-bottom: 1px solid var(--line);
}
.meta-row:last-child { border-bottom: 0; padding-bottom: 0; }
.meta-row:first-child { padding-top: 0; }
.meta-row__label { color: var(--muted); font-size: 10px; padding-top: 2px; }
.meta-row__value { text-align: right; font-size: 12px; font-weight: 650; max-width: 68%; word-break: break-word; }
.meta-row__value small { display: block; margin-top: 2px; color: var(--muted); font-size: 9px; font-weight: 500; }
.review-path { display: flex; align-items: center; gap: 5px; margin: 12px 0 9px; }
.review-path__dot {
  width: 20px; height: 20px; border-radius: 50%;
  display: grid; place-items: center;
  background: #ece6da; color: #a59a88; font-size: 8px; font-weight: 800;
}
.review-path__dot.on { background: var(--green); color: #fff; }
.review-path__line { flex: 1; height: 1.5px; background: var(--line); }
.review-next {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 11px; border-radius: 10px;
  background: var(--paper-2); font-size: 10px; color: var(--muted);
}
.review-next b { color: var(--ink); }
.topic-tip {
  position: relative; overflow: hidden;
  padding: 19px;
  border-radius: var(--r-md);
  background:
    radial-gradient(circle at 100% 0%, var(--topic-soft, var(--green-soft)), transparent 60%),
    var(--paper);
  border: 1px solid var(--line);
}
.topic-tip__head { display: flex; align-items: center; gap: 9px; margin-bottom: 8px; }
.topic-tip__icon {
  width: 33px; height: 33px; border-radius: 10px;
  display: grid; place-items: center;
  background: var(--topic-soft); color: var(--topic);
  font-family: var(--font-serif); font-size: 16px; font-weight: 800;
}
.topic-tip__head b { display: block; font-size: 12px; }
.topic-tip__head small { display: block; color: var(--muted); font-size: 9px; }
.topic-tip p { margin: 0 0 12px; font-size: 11px; line-height: 1.75; color: var(--ink-2); }
.topic-tip .link-more { font-size: 10px; }
.related-list { display: flex; flex-direction: column; gap: 7px; }
.related-item {
  display: flex; gap: 9px; align-items: center;
  padding: 9px 10px; border-radius: 10px; border: 1px solid var(--line);
  font-size: 11px; color: var(--ink-2);
}
.related-item:hover { background: var(--paper-2); color: var(--ink); }
.related-item span {
  display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical; overflow: hidden;
  flex: 1;
}
.history-list { display: flex; flex-direction: column; gap: 0; }
.history-item { display: flex; gap: 9px; }
.history-item__rail { display: flex; flex-direction: column; align-items: center; }
.history-item__dot { width: 7px; height: 7px; border-radius: 50%; background: var(--line-strong); margin-top: 6px; flex: none; }
.history-item__dot--correct { background: var(--green); }
.history-item__dot--wrong { background: var(--red); }
.history-item__dot--fuzzy { background: var(--yellow); }
.history-item__line { width: 1px; flex: 1; background: var(--line); min-height: 14px; }
.history-item__body { padding-bottom: 9px; font-size: 10px; color: var(--muted); }
.history-item__body b { color: var(--ink-2); font-weight: 650; }

/* ---------------- 拍照录题 ---------------- */
.capture-shell { max-width: 960px; margin: 0 auto; }
.capture-intro {
  display: flex; align-items: flex-end; justify-content: space-between; gap: 16px;
  margin-bottom: 19px;
}
.capture-intro h1 { margin: 6px 0 0; font-size: clamp(25px, 3vw, 32px); letter-spacing: -0.02em; }
.capture-intro p { margin: 6px 0 0; color: var(--muted); font-size: 12px; }
.dropzone {
  position: relative; overflow: hidden;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  min-height: 330px; padding: 35px 22px;
  border: 1.5px dashed #cfc3b0; border-radius: var(--r-xl);
  background:
    linear-gradient(rgba(255,253,247,.7), rgba(255,253,247,.7)),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='26' height='26'%3E%3Cpath d='M26 0H0v26' fill='none' stroke='%232f6b5f' stroke-opacity='.05'/%3E%3C/svg%3E");
  text-align: center;
  transition: border-color .18s ease, background .18s ease;
}
.dropzone.is-drag { border-color: var(--green); background-color: var(--green-mist); }
.dropzone__art {
  position: relative; width: 102px; height: 92px; margin-bottom: 16px;
}
.dropzone__paper {
  position: absolute; left: 17px; top: 2px;
  width: 68px; height: 78px; border-radius: 9px;
  background: #fffdf8; border: 1.5px solid #d7ccbb;
  box-shadow: 8px 7px 0 #eee4d5;
  transform: rotate(-4deg);
  display: flex; flex-direction: column; gap: 5px; padding: 13px 10px;
}
.dropzone__paper i { display: block; height: 3px; border-radius: 3px; background: #e3d9c9; }
.dropzone__paper i:nth-child(2) { width: 80%; }
.dropzone__paper i:nth-child(3) { width: 55%; }
.dropzone__camera {
  position: absolute; right: 0; bottom: 0;
  width: 43px; height: 43px; border-radius: 50%;
  display: grid; place-items: center;
  background: var(--orange); color: #fff8f1;
  border: 3px solid var(--bg);
  box-shadow: 0 6px 14px rgba(181,86,44,.24);
}
.dropzone__camera .icon { width: 20px; height: 20px; }
.dropzone h2 { margin: 0 0 5px; font-size: 19px; }
.dropzone p { margin: 0 0 18px; color: var(--muted); font-size: 11px; }
.dropzone__actions { display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; }
.dropzone__hint { margin-top: 15px; color: var(--muted-2); font-size: 10px; }
.capture-benefits {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-top: 14px;
}
.benefit {
  display: flex; gap: 10px; align-items: flex-start;
  padding: 13px; border: 1px solid var(--line); border-radius: 13px;
  background: rgba(255,253,247,.55);
}
.benefit .icon { width: 18px; height: 18px; color: var(--green); margin-top: 1px; }
.benefit b { display: block; font-size: 11px; }
.benefit small { display: block; color: var(--muted); font-size: 9px; line-height: 1.5; margin-top: 2px; }

.capture-work { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(280px, .72fr); gap: 16px; align-items: start; }
.photo-stage {
  position: relative; overflow: hidden;
  border-radius: var(--r-lg); border: 1px solid var(--line);
  background: #e9e3d8; min-height: 260px;
  display: flex; align-items: center; justify-content: center;
}
.photo-stage img { max-height: 460px; width: 100%; object-fit: contain; }
.photo-stage__tools { position: absolute; top: 9px; right: 9px; display: flex; gap: 5px; }
.photo-stage__tools .icon-btn {
  width: 37px; height: 37px; background: rgba(255,253,247,.9);
  border-color: rgba(255,255,255,.5); backdrop-filter: blur(8px);
}
.photo-caption {
  position: absolute; left: 10px; bottom: 9px;
  padding: 4px 8px; border-radius: 99px;
  background: rgba(26,44,38,.58); color: #fff; font-size: 9px;
  backdrop-filter: blur(4px);
}
.ocr-panel { padding: 20px; }
.ocr-panel h2 { margin: 2px 0 4px; font-size: 18px; }
.ocr-panel > p { margin: 0 0 14px; color: var(--muted); font-size: 11px; line-height: 1.65; }
.ocr-choice { display: flex; flex-direction: column; gap: 8px; }
.ocr-choice .btn { width: 100%; justify-content: flex-start; padding-left: 15px; }
.ocr-choice .btn .icon { margin-right: 2px; }
.ocr-choice .btn small { margin-left: auto; color: inherit; opacity: .6; font-size: 9px; font-weight: 500; }
.ocr-note { margin-top: 13px; padding-top: 13px; border-top: 1px dashed var(--line); color: var(--muted-2); font-size: 9px; line-height: 1.65; }
.ocr-progress { padding: 20px; }
.ocr-progress__top { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.ocr-progress__spinner {
  width: 43px; height: 43px; border-radius: 14px;
  display: grid; place-items: center;
  background: var(--green-soft); color: var(--green);
}
.ocr-progress__spinner .icon { animation: spin 2.8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.ocr-progress h3 { margin: 13px 0 4px; font-size: 15px; }
.ocr-progress p { margin: 0; color: var(--muted); font-size: 10px; }
.ocr-progress .progress { margin: 14px 0 10px; }
.ocr-progress__meta { display: flex; justify-content: space-between; color: var(--muted); font-size: 9px; }
.ocr-progress__tips { margin-top: 15px; padding: 10px 12px; border-radius: 10px; background: var(--paper-2); font-size: 9px; color: var(--muted); line-height: 1.65; }

.capture-form-card { margin-top: 16px; padding: 25px; }
.form-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 15px; margin-bottom: 20px; }
.form-head h2 { margin: 0; font-size: 18px; }
.form-head p { margin: 4px 0 0; color: var(--muted); font-size: 11px; }
.ocr-result-note {
  display: flex; align-items: center; gap: 8px;
  margin-bottom: 15px; padding: 9px 11px;
  border-radius: 9px; background: var(--green-soft); color: var(--green-deep);
  font-size: 10px;
}
.ocr-result-note .icon { width: 14px; height: 14px; }
.ocr-result-note--warn { background: var(--yellow-soft); color: #7b5c1e; }
.symbol-wrap { margin-top: 7px; }
.form-footer-sticky {
  position: sticky; bottom: calc(var(--tab-h) + var(--safe-bottom) + 8px); z-index: 12;
  margin: 20px -25px -25px; padding: 15px 25px;
  background: rgba(255,253,247,.92); border-top: 1px solid var(--line);
  border-radius: 0 0 var(--r-lg) var(--r-lg);
  backdrop-filter: blur(14px);
}
.form-footer-sticky .form-actions { margin: 0; padding: 0; border: 0; }
.form-footer-sticky .hint { color: var(--muted); font-size: 10px; }

/* ---------------- 练习 ---------------- */
.practice-hero {
  position: relative; overflow: hidden;
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(240px, .55fr);
  gap: 18px; align-items: center;
  padding: 28px 30px;
  border-radius: var(--r-xl);
  color: var(--ink);
  background:
    radial-gradient(circle at 92% 12%, rgba(213,111,63,.14), transparent 33%),
    linear-gradient(140deg, #fffdf7, #f8f0e0);
  border: 1px solid #e8decc;
  box-shadow: var(--shadow-sm);
}
.practice-hero h1 { margin: 8px 0 7px; font-size: clamp(25px, 3.2vw, 35px); letter-spacing: -.025em; }
.practice-hero p { margin: 0 0 18px; color: var(--muted); font-size: 12px; max-width: 480px; }
.practice-hero__stat {
  position: relative; padding: 17px;
  border-radius: 17px; background: var(--green); color: #fffaf0;
  box-shadow: 0 13px 25px rgba(34,79,69,.15);
  transform: rotate(1.4deg);
}
.practice-hero__stat .mini-label { color: rgba(255,250,240,.6); }
.practice-hero__stat b { display: block; font-family: var(--font-serif); font-size: 45px; line-height: 1.1; margin: 5px 0 3px; }
.practice-hero__stat small { color: rgba(255,250,240,.7); font-size: 10px; }
.practice-hero__stat .spark { position: absolute; right: 13px; top: 12px; color: #f4c690; }
.practice-modes { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; margin-top: 18px; }
.mode-card { padding: 21px; position: relative; }
.mode-card--due { border-color: #f0d5c2; background: linear-gradient(145deg, #fffdf8, #fdf2e7); }
.mode-card--random { border-color: #d6e6de; background: linear-gradient(145deg, #fffdf8, #eef7f2); }
.mode-card__head { display: flex; align-items: center; gap: 11px; margin-bottom: 10px; }
.mode-icon {
  width: 39px; height: 39px; border-radius: 12px; flex: none;
  display: grid; place-items: center;
  background: var(--orange-soft); color: var(--orange-deep);
}
.mode-icon--green { background: var(--green-soft); color: var(--green); }
.mode-card h2 { margin: 0; font-size: 15px; }
.mode-card p { margin: 0; color: var(--muted); font-size: 10px; }
.mode-card .mode-count {
  font-family: var(--font-serif); font-size: 28px; font-weight: 800;
  color: var(--green); line-height: 1.2;
}
.mode-card .mode-count small { font-family: var(--font-sans); font-size: 10px; color: var(--muted); font-weight: 500; }
.mode-card__actions { display: flex; align-items: center; gap: 8px; margin-top: 13px; flex-wrap: wrap; }
.mode-card__actions .btn { min-width: 116px; }
.count-picker { display: inline-flex; gap: 3px; padding: 3px; border-radius: 99px; background: #f2eee5; }
.count-picker button {
  min-width: 42px; min-height: 30px; padding: 0 8px; border: 0; border-radius: 99px;
  background: transparent; color: var(--muted); font-size: 10px; font-weight: 700;
}
.count-picker button.active { background: var(--paper); color: var(--green-deep); box-shadow: 0 2px 6px rgba(35,58,49,.08); }
.category-practice {
  margin-top: 18px; padding: 22px;
}
.topic-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.topic-practice-item {
  position: relative;
  display: flex; flex-direction: column; align-items: flex-start;
  gap: 2px; padding: 12px;
  border: 1px solid var(--line); border-radius: 12px;
  background: #fffefa; text-align: left;
  transition: border-color .17s ease, background .17s ease, transform .17s ease;
}
.topic-practice-item:hover { border-color: var(--topic); background: var(--topic-soft); transform: translateY(-1px); }
.topic-practice-item b { display: flex; align-items: center; gap: 6px; font-size: 11px; }
.topic-practice-item b i {
  width: 22px; height: 22px; border-radius: 7px;
  display: grid; place-items: center; font-style: normal;
  background: var(--topic-soft); color: var(--topic); font-size: 12px;
}
.topic-practice-item small { color: var(--muted); font-size: 9px; margin-left: 28px; }
.topic-practice-item .icon { position: absolute; right: 8px; top: 14px; width: 13px; height: 13px; color: var(--muted-2); }
.practice-bottom-note { margin-top: 18px; text-align: center; color: var(--muted); font-size: 10px; }

/* 练习进行中 */
body.focus-mode .sidebar,
body.focus-mode .tabbar,
body.focus-mode .mobile-topbar { display: none !important; }
body.focus-mode .shell { display: block; }
body.focus-mode .view { max-width: 900px; padding: 24px 22px calc(46px + env(safe-area-inset-bottom, 0px)); }
body.focus-mode .main { padding-top: env(safe-area-inset-top, 0px); }
body.focus-mode { background-image: radial-gradient(circle at 50% 0%, rgba(47,107,95,.08), transparent 38%), url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='28' height='28' viewBox='0 0 28 28'%3E%3Ccircle cx='1.2' cy='1.2' r='1.2' fill='%232f6b5f' fill-opacity='.045'/%3E%3C/svg%3E"); }
.session-top { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 12px; }
.session-top__meta { display: flex; align-items: center; gap: 9px; color: var(--muted); font-size: 11px; }
.session-top__meta b { color: var(--ink); }
.session-progress { margin-bottom: 20px; }
.session-progress__bar { display: flex; gap: 4px; }
.session-seg { height: 5px; flex: 1; border-radius: 99px; background: #e4ddd0; overflow: hidden; }
.session-seg.is-done { background: var(--green); }
.session-seg.is-now { background: var(--orange); }
.practice-card { padding: clamp(19px, 4vw, 33px); }
.practice-qhead { display: flex; align-items: center; justify-content: space-between; gap: 10px; flex-wrap: wrap; margin-bottom: 15px; }
.practice-qnum { display: flex; align-items: baseline; gap: 6px; color: var(--muted); font-size: 11px; }
.practice-qnum b { font-family: var(--font-serif); font-size: 26px; color: var(--green); line-height: 1; }
.practice-stem { font-size: clamp(17px, 2.2vw, 20px); line-height: 1.9; color: var(--ink); white-space: pre-wrap; word-break: break-word; }
.practice-photo { margin-top: 15px; border-radius: 13px; overflow: hidden; border: 1px solid var(--line); background: var(--paper-2); }
.practice-photo img { width: 100%; max-height: 390px; object-fit: contain; cursor: zoom-in; }
.practice-photo__tools { display: flex; justify-content: flex-end; gap: 7px; margin-top: 8px; }
.answer-area { margin-top: 22px; padding-top: 20px; border-top: 1px dashed var(--line); }
.answer-area__head { display: flex; align-items: center; justify-content: space-between; gap: 9px; margin-bottom: 9px; }
.answer-area__head b { font-size: 12px; }
.answer-area .textarea { min-height: 105px; background: #fffefa; }
.answer-input-tools { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-top: 7px; color: var(--muted-2); font-size: 9px; }
.answer-input-tools .row { gap: 4px; }
.answer-input-tools .btn { min-height: 29px; padding: 0 9px; font-size: 9px; }
.reveal-btn-row { display: flex; justify-content: center; margin-top: 17px; }
.reveal-btn-row .btn { min-width: 230px; }
.answer-reveal { animation: reveal-in .35s ease both; margin-top: 22px; }
@keyframes reveal-in { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
.reveal-answer { padding: 16px; border-radius: 13px; background: var(--green-soft); border: 1px solid #cfe5da; }
.reveal-answer__label { display: flex; align-items: center; gap: 5px; color: var(--green); font-size: 9px; font-weight: 800; letter-spacing: .09em; margin-bottom: 5px; }
.reveal-answer__text { font-size: 15px; line-height: 1.75; white-space: pre-wrap; color: var(--green-deep); }
.reveal-analysis { margin-top: 13px; padding: 15px 16px; border-radius: 13px; background: var(--paper-2); border: 1px solid var(--line); }
.reveal-analysis__label { display: flex; align-items: center; gap: 5px; color: var(--muted); font-size: 9px; font-weight: 800; letter-spacing: .09em; margin-bottom: 6px; }
.reveal-analysis p { margin: 0; font-size: 13px; line-height: 1.9; color: var(--ink-2); white-space: pre-wrap; }
.my-answer-box { margin-top: 11px; padding: 11px 13px; border-radius: 11px; background: rgba(255,255,255,.6); border: 1px solid var(--line); }
.my-answer-box small { color: var(--muted); font-size: 9px; }
.my-answer-box div { font-size: 12px; color: var(--ink-2); white-space: pre-wrap; }
.judge-area { margin-top: 20px; padding-top: 18px; border-top: 1px dashed var(--line-strong); }
.judge-area > p { margin: 0 0 10px; text-align: center; color: var(--muted); font-size: 10px; }
.judge-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.judge-btn {
  padding: 11px 8px; border-radius: 12px; border: 1.5px solid;
  background: #fffefa; text-align: center; transition: transform .15s ease, box-shadow .15s ease;
}
.judge-btn:hover { transform: translateY(-1px); box-shadow: var(--shadow-sm); }
.judge-btn b { display: flex; align-items: center; justify-content: center; gap: 5px; font-size: 11px; }
.judge-btn small { display: block; margin-top: 2px; font-size: 8px; opacity: .7; }
.judge-btn--correct { border-color: #bcdccb; background: var(--green-soft); color: var(--green-deep); }
.judge-btn--fuzzy { border-color: #ecd9a9; background: var(--yellow-soft); color: #76591b; }
.judge-btn--wrong { border-color: #ecc8c3; background: var(--red-soft); color: var(--red); }
.session-footer { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-top: 16px; color: var(--muted-2); font-size: 9px; }
.session-footer .btn { min-height: 33px; font-size: 10px; }

.result-card { text-align: center; padding: 30px; overflow: hidden; position: relative; }
.result-rings { position: absolute; inset: -80px -60px auto; height: 300px; background: radial-gradient(circle, rgba(47,107,95,.1), transparent 65%); pointer-events: none; }
.result-medal {
  position: relative; width: 78px; height: 78px; margin: 0 auto 14px;
  border-radius: 50%; display: grid; place-items: center;
  background: var(--green); color: #fffaf0;
  box-shadow: 0 12px 25px rgba(34,79,69,.22);
}
.result-medal .icon { width: 36px; height: 36px; }
.result-card h1 { margin: 0 0 5px; font-size: 26px; letter-spacing: -.02em; }
.result-card > p { margin: 0 auto; max-width: 430px; color: var(--muted); font-size: 12px; }
.result-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 9px; margin: 23px 0; }
.result-stat { padding: 13px; border-radius: 12px; background: var(--paper-2); border: 1px solid var(--line); }
.result-stat b { display: block; font-family: var(--font-serif); font-size: 26px; color: var(--green); line-height: 1.2; }
.result-stat small { color: var(--muted); font-size: 9px; }
.result-breakdown { text-align: left; margin: 20px 0; }
.result-breakdown h3 { font-size: 12px; margin: 0 0 8px; }
.result-q-row {
  display: flex; align-items: center; gap: 9px;
  padding: 9px 10px; border-radius: 9px; background: #fffefa; border: 1px solid var(--line);
  font-size: 10px; color: var(--muted);
}
.result-q-row + .result-q-row { margin-top: 5px; }
.result-q-row b { color: var(--ink-2); font-weight: 650; min-width: 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.result-q-row .pill { margin-left: auto; }
.result-actions { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; margin-top: 8px; }

/* ---------------- 报告 ---------------- */
.report-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 18px; flex-wrap: wrap; }
.segmented { display: inline-flex; gap: 3px; padding: 3px; border-radius: 99px; background: #ece6da; }
.segmented button {
  min-height: 32px; padding: 0 13px; border: 0; border-radius: 99px;
  background: transparent; color: var(--muted); font-size: 10px; font-weight: 700;
}
.segmented button.active { background: var(--paper); color: var(--green-deep); box-shadow: 0 2px 5px rgba(35,58,49,.08); }
.report-quote {
  position: relative; overflow: hidden;
  padding: 24px 27px;
  border-radius: var(--r-lg);
  background:
    radial-gradient(circle at 95% 20%, rgba(213,111,63,.14), transparent 35%),
    linear-gradient(135deg, #fffdf8, #f8f1e3);
  border: 1px solid #e8ddca;
}
.report-quote::before {
  content: "“"; position: absolute; right: 22px; top: -20px;
  font-family: var(--font-serif); font-size: 130px; line-height: 1; color: rgba(47,107,95,.08);
}
.report-quote .mini-label { color: var(--orange-deep); }
.report-quote p {
  position: relative; max-width: 800px; margin: 8px 0 0;
  font-family: var(--font-serif); font-size: clamp(17px, 2vw, 21px);
  line-height: 1.75; color: var(--ink); letter-spacing: .005em;
}
.report-quote .quote-foot { display: flex; align-items: center; gap: 7px; margin-top: 13px; color: var(--muted); font-size: 10px; }
.report-kpis { display: grid; grid-template-columns: repeat(4, 1fr); gap: 11px; margin-top: 15px; }
.kpi {
  padding: 16px 17px; border-radius: var(--r-md);
  background: var(--paper); border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
}
.kpi__label { color: var(--muted); font-size: 10px; }
.kpi__num { margin-top: 4px; font-family: var(--font-serif); font-size: 31px; font-weight: 800; line-height: 1.1; color: var(--ink); }
.kpi__num small { font-family: var(--font-sans); font-size: 11px; color: var(--muted); font-weight: 500; }
.kpi__hint { margin-top: 3px; color: var(--green); font-size: 9px; }
.report-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 15px; margin-top: 15px; align-items: start; }
.report-col { display: flex; flex-direction: column; gap: 15px; min-width: 0; }
.report-card { padding: 21px 22px; }
.report-card h2 { margin: 0; font-size: 14px; }
.report-card .section-head { margin-bottom: 17px; }
.chart-bars {
  display: flex; align-items: flex-end; gap: 8px;
  height: 180px; padding: 8px 4px 0;
  border-bottom: 1px solid var(--line);
}
.bar-col { flex: 1; display: flex; flex-direction: column; justify-content: flex-end; align-items: center; gap: 4px; height: 100%; min-width: 0; }
.bar-stack { display: flex; flex-direction: column-reverse; justify-content: flex-start; width: min(30px, 100%); height: 100%; gap: 2px; }
.bar-seg { width: 100%; border-radius: 4px 4px 2px 2px; min-height: 2px; transition: height .4s ease; }
.bar-seg--capture { background: var(--orange); }
.bar-seg--review { background: var(--green); opacity: .78; border-radius: 2px; }
.bar-col__label { margin-top: 7px; color: var(--muted); font-size: 8px; white-space: nowrap; }
.chart-legend { display: flex; gap: 13px; margin-top: 12px; color: var(--muted); font-size: 9px; flex-wrap: wrap; }
.legend-dot { display: inline-block; width: 7px; height: 7px; border-radius: 2px; margin-right: 4px; vertical-align: 1px; }
.donut-wrap { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }
.donut {
  --segments: conic-gradient(#ddd 0 100%);
  position: relative; width: 128px; height: 128px; border-radius: 50%;
  background: var(--segments); flex: none;
}
.donut::after {
  content: ""; position: absolute; inset: 16px; border-radius: 50%; background: var(--paper);
}
.donut__center {
  position: absolute; inset: 0; z-index: 1; display: grid; place-content: center; text-align: center;
}
.donut__center b { font-family: var(--font-serif); font-size: 24px; line-height: 1; }
.donut__center small { color: var(--muted); font-size: 8px; margin-top: 3px; }
.donut-legend { flex: 1; min-width: 140px; display: flex; flex-direction: column; gap: 6px; }
.donut-legend__row { display: flex; align-items: center; gap: 6px; font-size: 9px; color: var(--muted); }
.donut-legend__row i { width: 7px; height: 7px; border-radius: 2px; flex: none; background: var(--c); }
.donut-legend__row span { color: var(--ink-2); }
.donut-legend__row b { margin-left: auto; color: var(--ink-2); font-size: 9px; }
.topic-progress-list { display: flex; flex-direction: column; gap: 12px; }
.topic-progress-row { display: grid; grid-template-columns: 1fr auto; gap: 4px 8px; align-items: center; }
.topic-progress-row__name { display: flex; align-items: center; gap: 6px; font-size: 10px; color: var(--ink-2); font-weight: 650; }
.topic-progress-row__name i { width: 7px; height: 7px; border-radius: 2px; background: var(--c); flex: none; }
.topic-progress-row__num { color: var(--muted); font-size: 9px; }
.topic-progress-row .progress { grid-column: 1 / -1; height: 5px; }
.reason-bars { display: flex; flex-direction: column; gap: 10px; }
.reason-row { display: grid; grid-template-columns: 58px 1fr 28px; gap: 8px; align-items: center; font-size: 9px; }
.reason-row > span:first-child { color: var(--ink-2); }
.reason-row__track { height: 6px; border-radius: 99px; background: #eee8dc; overflow: hidden; }
.reason-row__fill { height: 100%; border-radius: inherit; background: var(--c, var(--orange)); }
.reason-row b { text-align: right; color: var(--muted); font-weight: 650; }
.next-steps { margin-top: 15px; }
.next-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 9px; }
.next-card {
  display: flex; flex-direction: column; gap: 5px;
  padding: 14px; border-radius: 13px;
  background: var(--topic-soft); border: 1px solid transparent;
  color: var(--ink);
}
.next-card:hover { border-color: var(--topic); }
.next-card__top { display: flex; align-items: center; gap: 6px; }
.next-card__top i { width: 24px; height: 24px; border-radius: 7px; display: grid; place-items: center; background: rgba(255,255,255,.6); font-style: normal; }
.next-card b { font-size: 11px; }
.next-card p { margin: 0; color: var(--ink-2); font-size: 9px; line-height: 1.55; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.next-card span { color: var(--topic); font-size: 9px; font-weight: 700; }
.report-footnote { margin-top: 18px; text-align: center; color: var(--muted-2); font-size: 9px; }

/* ---------------- 知识卡 ---------------- */
.knowledge-hero {
  position: relative; overflow: hidden;
  display: flex; align-items: center; justify-content: space-between; gap: 20px;
  padding: 25px 28px; border-radius: var(--r-xl);
  background:
    radial-gradient(circle at 90% 10%, rgba(213,111,63,.12), transparent 38%),
    linear-gradient(140deg, #fffdf8, #f6efe2);
  border: 1px solid #e8ddca;
}
.knowledge-hero h1 { margin: 7px 0 5px; font-size: clamp(25px, 3vw, 33px); letter-spacing: -.02em; }
.knowledge-hero p { max-width: 540px; margin: 0; color: var(--muted); font-size: 12px; }
.knowledge-hero__art { display: flex; gap: -8px; transform: rotate(4deg); }
.k-card-mini {
  width: 66px; height: 86px; border-radius: 9px;
  border: 1px solid #dcd1c0; background: #fffdf8;
  box-shadow: 6px 6px 0 #eee3d1;
  display: flex; flex-direction: column; gap: 4px; padding: 11px 8px;
}
.k-card-mini + .k-card-mini { margin-left: -18px; transform: rotate(7deg) translateY(4px); }
.k-card-mini i { height: 4px; border-radius: 2px; background: #e3d8c7; display: block; }
.k-card-mini i:first-child { width: 65%; background: var(--orange); opacity: .5; }
.k-card-mini i:last-child { width: 50%; }
.knowledge-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 11px; margin-top: 17px; }
.topic-card {
  position: relative; overflow: hidden;
  display: flex; flex-direction: column;
  min-height: 158px; padding: 17px;
  border: 1px solid var(--line); border-radius: var(--r-md);
  background:
    radial-gradient(circle at 100% 0%, var(--topic-soft), transparent 65%),
    var(--paper);
  color: var(--ink);
  transition: transform .18s ease, border-color .18s ease, box-shadow .18s ease;
}
.topic-card:hover { transform: translateY(-3px); border-color: var(--topic); box-shadow: var(--shadow-sm); color: var(--ink); }
.topic-card__top { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.topic-card__icon {
  width: 36px; height: 36px; border-radius: 11px;
  display: grid; place-items: center;
  background: var(--topic-soft); color: var(--topic);
  font-family: var(--font-serif); font-size: 17px; font-weight: 800;
}
.topic-card__count { color: var(--muted); font-size: 9px; }
.topic-card h2 { margin: 12px 0 3px; font-size: 14px; letter-spacing: -.01em; }
.topic-card p {
  margin: 0; color: var(--muted); font-size: 9px; line-height: 1.6;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.topic-card__foot { display: flex; align-items: center; justify-content: space-between; margin-top: auto; padding-top: 11px; font-size: 9px; color: var(--muted); }
.topic-card__foot .icon { width: 13px; height: 13px; color: var(--topic); }
.topic-card__bar { height: 3px; background: #ede6d9; border-radius: 99px; overflow: hidden; margin-top: 5px; width: 100%; }
.topic-card__bar i { display: block; height: 100%; background: var(--topic); border-radius: inherit; }
.knowledge-cta {
  display: flex; align-items: center; inset: auto 0 0;
  gap: 10px; padding: 13px 15px; margin-top: 16px;
  border-radius: var(--r-md);
  background: var(--green-soft); color: var(--green-deep);
  font-size: 11px;
}
.knowledge-cta .icon { width: 17px; height: 17px; }

.topic-detail-hero {
  position: relative; overflow: hidden;
  padding: 28px 30px; border-radius: var(--r-xl);
  background:
    radial-gradient(circle at 86% 20%, var(--topic-soft), transparent 45%),
    linear-gradient(140deg, #fffdf8, #f9f4e9);
  border: 1px solid var(--line);
}
.topic-detail-hero__top { display: flex; align-items: flex-start; justify-content: space-between; gap: 15px; }
.topic-detail-hero__icon {
  width: 58px; height: 58px; border-radius: 18px;
  display: grid; place-items: center;
  background: var(--topic-soft); color: var(--topic);
  font-family: var(--font-serif); font-size: 27px; font-weight: 800;
  transform: rotate(-3deg);
}
.topic-detail-hero h1 { margin: 13px 0 5px; font-size: clamp(26px, 3.2vw, 35px); letter-spacing: -.02em; }
.topic-detail-hero .tagline { color: var(--topic); font-size: 12px; font-weight: 700; }
.topic-detail-hero > p { max-width: 730px; margin: 12px 0 0; color: var(--ink-2); font-size: 13px; line-height: 1.85; }
.topic-detail-stats { display: flex; gap: 20px; margin-top: 20px; flex-wrap: wrap; }
.topic-detail-stat b { display: block; font-family: var(--font-serif); font-size: 23px; line-height: 1.2; color: var(--ink); }
.topic-detail-stat small { color: var(--muted); font-size: 9px; }
.topic-detail-layout { display: grid; grid-template-columns: minmax(0, 1.45fr) minmax(250px, .65fr); gap: 15px; margin-top: 15px; align-items: start; }
.topic-detail-main { display: flex; flex-direction: column; gap: 15px; min-width: 0; }
.topic-detail-side { display: flex; flex-direction: column; gap: 15px; }
.method-list { display: flex; flex-direction: column; gap: 14px; }
.method-item { display: flex; gap: 12px; }
.method-item__num {
  width: 27px; height: 27px; border-radius: 9px; flex: none;
  display: grid; place-items: center;
  background: var(--topic-soft); color: var(--topic);
  font-family: var(--font-serif); font-size: 13px; font-weight: 800;
}
.method-item b { display: block; font-size: 12px; margin-bottom: 2px; }
.method-item p { margin: 0; color: var(--muted); font-size: 11px; line-height: 1.8; }
.formula-list { display: grid; grid-template-columns: 1fr 1fr; gap: 9px; }
.formula-card {
  padding: 13px; border-radius: 11px; background: var(--paper-2); border: 1px solid var(--line);
}
.formula-card__label { color: var(--muted); font-size: 9px; margin-bottom: 5px; }
.formula-card__expr {
  font-family: var(--font-mono); font-size: 12px; line-height: 1.6;
  color: var(--ink); word-break: break-word;
}
.formula-card__note { margin-top: 5px; color: var(--muted-2); font-size: 9px; line-height: 1.55; }
.pitfall-list { margin: 0; padding: 0; list-style: none; display: flex; flex-direction: column; gap: 8px; }
.pitfall-list li {
  position: relative; padding-left: 19px;
  color: var(--ink-2); font-size: 11px; line-height: 1.7;
}
.pitfall-list li::before {
  content: "!"; position: absolute; left: 0; top: 2px;
  width: 13px; height: 13px; border-radius: 50%;
  display: grid; place-items: center;
  background: var(--orange-soft); color: var(--orange-deep);
  font-size: 8px; font-weight: 900;
}
.step-list { counter-reset: step; list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 8px; }
.step-list li {
  counter-increment: step; position: relative; padding-left: 30px;
  color: var(--ink-2); font-size: 11px; line-height: 1.7;
}
.step-list li::before {
  content: counter(step); position: absolute; left: 0; top: 0;
  width: 21px; height: 21px; border-radius: 7px;
  display: grid; place-items: center;
  background: var(--paper-2); color: var(--muted);
  font-family: var(--font-serif); font-size: 10px; font-weight: 800;
}
.knowledge-question-list { display: flex; flex-direction: column; gap: 6px; }
.kq-item {
  display: flex; align-items: center; gap: 8px;
  padding: 9px 10px; border-radius: 9px;
  background: #fffefa; border: 1px solid var(--line);
  font-size: 10px; color: var(--ink-2);
}
.kq-item:hover { border-color: var(--topic); color: var(--ink); }
.kq-item span { display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical; overflow: hidden; flex: 1; }
.knowledge-empty { padding: 10px 0; color: var(--muted); font-size: 10px; }

/* ---------------- 设置 ---------------- */
.settings-wrap { max-width: 820px; }
.settings-section { margin-bottom: 15px; padding: 22px; }
.settings-section__head { display: flex; align-items: flex-start; gap: 11px; margin-bottom: 17px; }
.settings-section__icon {
  width: 34px; height: 34px; border-radius: 10px; flex: none;
  display: grid; place-items: center;
  background: var(--green-soft); color: var(--green);
}
.settings-section__head h2 { margin: 0; font-size: 14px; }
.settings-section__head p { margin: 2px 0 0; color: var(--muted); font-size: 10px; }
.setting-row {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 13px 0; border-top: 1px solid var(--line);
}
.setting-row:first-of-type { padding-top: 0; border-top: 0; }
.setting-row:last-child { padding-bottom: 0; }
.setting-row__copy { min-width: 0; }
.setting-row__copy b { display: block; font-size: 12px; }
.setting-row__copy small { display: block; margin-top: 2px; color: var(--muted); font-size: 9px; line-height: 1.6; }
.setting-row__value { flex: none; }
.setting-row .input { width: 220px; }
.setting-row .select { width: 150px; }
.data-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.data-actions .btn { min-height: 38px; font-size: 11px; }
.danger-zone { border-color: #eed3ce; background: linear-gradient(145deg, #fffdf8, #fdf3f0); }
.danger-zone .settings-section__icon { background: var(--red-soft); color: var(--red); }
.storage-bar { height: 6px; background: #eee7da; border-radius: 99px; overflow: hidden; margin-top: 8px; }
.storage-bar i { display: block; height: 100%; background: var(--green); border-radius: inherit; }
.install-card {
  display: flex; align-items: center; gap: 14px;
  padding: 16px 18px; border-radius: 15px;
  background: var(--green); color: #fffaf0;
  margin-bottom: 15px;
}
.install-card__icon {
  width: 42px; height: 42px; border-radius: 13px;
  display: grid; place-items: center; background: rgba(255,255,255,.14);
}
.install-card h2 { margin: 0; font-size: 14px; }
.install-card p { margin: 2px 0 0; color: rgba(255,250,240,.64); font-size: 10px; }
.install-card .btn { margin-left: auto; background: #fff8ec; color: var(--green-deep); flex: none; }
.ai-status { display: flex; align-items: center; gap: 7px; color: var(--muted); font-size: 10px; }
.ai-status .dot { width: 7px; height: 7px; border-radius: 50%; background: #c9c2b5; }
.ai-status.is-on .dot { background: var(--green); box-shadow: 0 0 0 3px rgba(47,107,95,.12); }
.ai-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 4px; }
.ai-grid .span-2 { grid-column: 1 / -1; }
.ai-actions { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-top: 13px; }
.ai-help { margin-top: 11px; padding: 11px 13px; border-radius: 10px; background: var(--paper-2); color: var(--muted); font-size: 9px; line-height: 1.7; }
.key-mask { font-family: var(--font-mono); font-size: 10px; }
.about-copy { color: var(--muted); font-size: 10px; line-height: 1.8; }
.about-copy strong { color: var(--ink-2); }
.settings-version { display: flex; align-items: center; justify-content: space-between; gap: 12px; color: var(--muted); font-size: 9px; margin-top: 15px; }
.settings-footer { margin-top: 3px; }

/* ---------------- 弹层 / 提示 ---------------- */
.modal-backdrop {
  position: fixed; inset: 0; z-index: 100;
  display: grid; place-items: center;
  padding: 20px;
  background: rgba(22, 42, 35, .44);
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
  opacity: 0; transition: opacity .18s ease;
}
.modal-backdrop.is-in { opacity: 1; }
.modal {
  width: min(680px, 100%);
  max-height: calc(100dvh - 40px);
  display: flex; flex-direction: column;
  background: var(--paper);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-lg);
  transform: translateY(10px) scale(.985);
  transition: transform .2s ease;
  overflow: hidden;
}
.modal-backdrop.is-in .modal { transform: none; }
.modal--sm { width: min(430px, 100%); }
.modal--sheet { width: min(520px, 100%); }
.modal__head {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 17px 20px; border-bottom: 1px solid var(--line);
  flex: none;
}
.modal__head h2 { margin: 0; font-size: 15px; }
.modal__body { padding: 20px; overflow-y: auto; -webkit-overflow-scrolling: touch; }
.modal__body--flush { padding: 0; }
.modal__foot {
  display: flex; align-items: center; justify-content: flex-end; gap: 8px;
  padding: 13px 20px calc(13px + env(safe-area-inset-bottom, 0px));
  border-top: 1px solid var(--line); background: var(--paper); flex: none;
}
.modal__foot .btn { min-height: 40px; }
.confirm-copy { margin: 0; color: var(--ink-2); font-size: 13px; line-height: 1.8; white-space: pre-wrap; }
.modal-img { width: 100%; max-height: 72dvh; object-fit: contain; background: #f0ebdf; }
.image-viewer { background: rgba(16, 30, 25, .9); }
.image-viewer .modal { background: transparent; box-shadow: none; max-height: none; width: min(1000px, 100%); }
.image-viewer .modal__head { border: 0; color: #fff; padding-bottom: 4px; }
.image-viewer .modal__head h2 { color: #fff; font-size: 12px; font-weight: 500; opacity: .7; }
.image-viewer .icon-btn { color: #fff; }
.image-viewer .modal__body { padding: 0; display: grid; place-items: center; }
.image-viewer img { max-height: 80dvh; max-width: 100%; border-radius: 8px; }
.qr-box { text-align: center; padding: 4px 0 6px; }
.qr-box img, .qr-box canvas { margin: 0 auto 12px; border-radius: 10px; }
.qr-url {
  display: inline-block; padding: 7px 12px; border-radius: 8px;
  background: var(--paper-2); border: 1px solid var(--line);
  font-family: var(--font-mono); font-size: 11px; color: var(--ink-2);
  word-break: break-all;
}
.scratch-overlay {
  position: fixed; inset: 0; z-index: 120;
  display: flex; flex-direction: column;
  background: #f6f1e7;
  padding: env(safe-area-inset-top, 0px) 0 env(safe-area-inset-bottom, 0px);
}
.scratch-head {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  padding: 10px 14px; border-bottom: 1px solid var(--line); background: rgba(255,253,247,.9);
  flex-wrap: wrap;
}
.scratch-head__title { display: flex; align-items: center; gap: 7px; font-size: 12px; font-weight: 750; }
.scratch-tools { display: flex; gap: 5px; align-items: center; flex-wrap: wrap; }
.scratch-tool {
  width: 36px; height: 36px; display: grid; place-items: center;
  border: 1px solid var(--line); border-radius: 9px; background: var(--paper); color: var(--ink-2);
}
.scratch-tool.active { background: var(--green); color: #fff; border-color: var(--green); }
.scratch-tool .icon { width: 17px; height: 17px; }
.scratch-color {
  width: 25px; height: 25px; border-radius: 50%;
  border: 2px solid transparent; background: var(--c);
  position: relative;
}
.scratch-color.active { border-color: var(--ink); box-shadow: 0 0 0 2px var(--paper); }
.scratch-canvas-wrap { flex: 1; overflow: hidden; padding: 12px; }
.scratch-canvas-paper {
  width: 100%; height: 100%; border-radius: 12px; overflow: hidden;
  border: 1px solid var(--line); background:
    linear-gradient(rgba(255,255,255,.65), rgba(255,255,255,.65)),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24'%3E%3Cpath d='M24 0H0v24' fill='none' stroke='%232f6b5f' stroke-opacity='.09'/%3E%3C/svg%3E");
  box-shadow: var(--shadow-sm);
}
.scratch-canvas { width: 100%; height: 100%; display: block; touch-action: none; cursor: crosshair; }
.scratch-foot { padding: 0 14px 10px; color: var(--muted); font-size: 9px; text-align: center; }

#toast-root { position: fixed; inset: auto 0 calc(var(--tab-h) + var(--safe-bottom) + 14px); z-index: 200; display: flex; justify-content: center; pointer-events: none; padding: 0 18px; }
.toast {
  max-width: min(440px, 100%);
  padding: 11px 17px; border-radius: 99px;
  background: rgba(31, 53, 47, .94); color: #fffaf0;
  box-shadow: 0 10px 30px rgba(20, 40, 34, .22);
  font-size: 12px; line-height: 1.5;
  transform: translateY(10px); opacity: 0;
  transition: transform .2s ease, opacity .2s ease;
  text-align: center;
}
.toast.is-in { transform: none; opacity: 1; }
.toast--success { background: rgba(34, 79, 69, .96); }
.toast--warn { background: rgba(153, 102, 28, .96); }
.toast--error { background: rgba(155, 57, 48, .96); }

/* ---------------- 工具类 / 动效 ---------------- */
.anim-up { animation: anim-up .42s cubic-bezier(.2,.7,.3,1) both; }
.anim-up-1 { animation-delay: .03s; }
.anim-up-2 { animation-delay: .07s; }
.anim-up-3 { animation-delay: .11s; }
.anim-up-4 { animation-delay: .15s; }
@keyframes anim-up { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }

.loading-line { position: relative; overflow: hidden; height: 4px; border-radius: 99px; background: #eae4d8; }
.loading-line::after {
  content: ""; position: absolute; inset: 0; width: 35%;
  background: var(--green); border-radius: inherit;
  animation: loading-slide 1.1s ease-in-out infinite;
}
@keyframes loading-slide { from { transform: translateX(-120%); } to { transform: translateX(360%); } }

.scroll-x { overflow-x: auto; scrollbar-width: none; }
.scroll-x::-webkit-scrollbar { display: none; }
.hide { display: none !important; }

/* ---------------- 响应式 ---------------- */
@media (max-width: 1100px) {
  .view { padding: 28px 28px 90px; }
  .home-grid { grid-template-columns: minmax(0, 1.1fr) minmax(260px, .8fr); }
  .home-stats { gap: 9px; }
  .stat-card { padding: 13px 14px; }
  .stat-card__num { font-size: 26px; }
  .recent-grid { grid-template-columns: repeat(3, 1fr); }
  .knowledge-grid { grid-template-columns: repeat(2, 1fr); }
  .topic-grid { grid-template-columns: repeat(3, 1fr); }
  .next-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 960px) {
  .shell { display: block; }
  .sidebar { display: none; }
  .mobile-topbar { display: flex; }
  .tabbar { display: block; }
  .view { max-width: 820px; padding: 20px 18px calc(var(--tab-h) + var(--safe-bottom) + 30px); }
  .bank-tools { top: calc(58px + env(safe-area-inset-top, 0px)); }
  .home-hero { grid-template-columns: minmax(0, 1.3fr) minmax(170px, .55fr); padding: 27px 28px; }
  .home-hero h1 { font-size: 34px; }
  .hero-art svg { width: 190px; }
  .home-grid { grid-template-columns: 1fr 1fr; }
  .home-col--primary { grid-column: 1 / -1; }
  .home-col--secondary { grid-column: 1 / -1; display: grid; grid-template-columns: 1fr 1fr; align-items: stretch; }
  .recent-card { grid-column: 1 / -1; }
  .detail-side { position: static; }
  .detail-layout { grid-template-columns: minmax(0, 1fr); }
  .detail-side { display: grid; grid-template-columns: 1fr 1fr; align-items: start; }
  .detail-side .topic-tip { grid-column: 1 / -1; }
  .capture-work { grid-template-columns: minmax(0, 1fr); }
  .photo-stage img { max-height: 430px; }
  .practice-hero { grid-template-columns: 1fr; }
  .practice-hero__stat { display: flex; align-items: center; gap: 12px; transform: none; padding: 13px 16px; max-width: 300px; }
  .practice-hero__stat b { font-size: 30px; margin: 0; }
  .practice-hero__stat small { margin-left: auto; }
  .topic-detail-layout { grid-template-columns: 1fr; }
  .topic-detail-side { display: grid; grid-template-columns: 1fr 1fr; align-items: start; }
  .report-grid { grid-template-columns: 1fr; }
  .report-kpis { grid-template-columns: repeat(2, 1fr); }
  .capture-benefits { grid-template-columns: 1fr 1fr 1fr; }
  .form-actions { flex-wrap: wrap; }
}

@media (max-width: 680px) {
  body { font-size: 14px; }
  .input, .textarea, .select { font-size: 16px; }
  .view { padding: 16px 14px calc(var(--tab-h) + var(--safe-bottom) + 26px); }
  .page-head { align-items: flex-start; margin-bottom: 18px; }
  .page-head h1 { font-size: 25px; }
  .page-head p { font-size: 11px; }
  .page-actions { gap: 5px; }
  .page-actions .btn { min-height: 38px; padding: 0 13px; font-size: 11px; }
  .mobile-topbar { height: calc(56px + env(safe-area-inset-top, 0px)); padding-left: 14px; padding-right: 10px; }
  .mobile-topbar .icon-btn { width: 36px; height: 36px; }
  .home-hero { display: block; min-height: 0; padding: 23px 20px 22px; border-radius: 24px; }
  .home-hero h1 { font-size: 29px; max-width: 300px; text-wrap: balance; }
  .home-hero .hero-sub { margin-bottom: 16px; font-size: 12px; max-width: 300px; }
  .home-hero .hero-actions .btn { min-height: 41px; padding: 0 16px; font-size: 11px; }
  .hero-art { position: absolute; right: -104px; bottom: -92px; opacity: .14; pointer-events: none; }
  .hero-art svg { width: 196px; }
  .hero-math--1 { top: 18px; right: 20px; }
  .home-stats { grid-template-columns: 1fr 1fr; gap: 8px; margin-top: 11px; }
  .stat-card { padding: 12px 13px; border-radius: 14px; }
  .stat-card__num { font-size: 25px; margin-top: 3px; }
  .stat-card__icon { width: 27px; height: 27px; }
  .home-grid { grid-template-columns: 1fr; gap: 11px; margin-top: 11px; }
  .home-col { gap: 11px; }
  .home-col--secondary { grid-template-columns: 1fr; gap: 11px; }
  .daily-card { padding: 19px; border-radius: 19px; }
  .daily-card h2 { font-size: 18px; }
  .daily-card h2 strong { font-size: 28px; }
  .goal-ring { width: 52px; height: 52px; }
  .due-item { padding: 8px 9px; }
  .recent-card { padding: 18px; }
  .recent-grid { grid-template-columns: 1fr; }
  .mini-q__thumb { width: 52px; height: 52px; }
  .empty-home { padding: 22px 18px 23px; border-radius: 19px; }
  .empty-home h2 { font-size: 19px; }
  .steps-3 { grid-template-columns: 1fr; gap: 6px; }
  .step-card { display: flex; align-items: flex-start; gap: 7px; padding: 10px; }
  .step-card p { margin-top: 1px; }
  .empty-home__actions { flex-direction: column; align-items: stretch; }
  .capture-mini { padding: 18px; }
  .capture-mini h2 { font-size: 16px; }
  .weak-card, .tip-card { padding: 18px 19px; }
  .recent-card .section-head { margin-bottom: 10px; }

  .bank-tools { flex-wrap: nowrap; padding-top: 4px; top: calc(56px + env(safe-area-inset-top, 0px)); }
  .bank-search { flex: 1 1 auto; }
  .bank-sort { width: 112px; flex: 0 0 112px; }
  .bank-sort .select { width: 100%; font-size: 11px; padding-left: 10px; }
  .q-card { gap: 10px; padding: 13px; }
  .q-card__stem { font-size: 13px; -webkit-line-clamp: 3; }
  .q-card__thumb { width: 61px; height: 61px; }
  .q-card__foot { gap: 8px; }
  .bank-summary { font-size: 10px; }

  .detail-top { margin-bottom: 12px; }
  .detail-card { padding: 18px; border-radius: 18px; }
  .detail-stem { font-size: 16px; line-height: 1.85; }
  .answer-grid { grid-template-columns: 1fr; gap: 7px; }
  .detail-side { display: flex; flex-direction: column; }
  .detail-actions .btn { flex: 1 1 45%; }
  .detail-actions { padding: 12px; }
  .detail-photo img { max-height: 380px; }

  .capture-intro { display: block; margin-bottom: 14px; }
  .capture-intro h1 { font-size: 25px; }
  .dropzone { min-height: 305px; padding: 28px 16px; border-radius: 22px; }
  .dropzone h2 { font-size: 17px; }
  .capture-benefits { grid-template-columns: 1fr; gap: 7px; }
  .benefit { padding: 10px 12px; align-items: center; }
  .photo-stage { border-radius: 19px; }
  .photo-stage img { max-height: 330px; }
  .capture-form-card { padding: 18px; border-radius: 19px; margin-top: 11px; }
  .form-head { display: block; margin-bottom: 16px; }
  .form-head h2 { font-size: 17px; }
  .form-grid { grid-template-columns: 1fr; gap: 13px; }
  .form-grid .span-2 { grid-column: auto; }
  .form-section__head h3 { font-size: 13px; }
  .form-footer-sticky { margin: 18px -18px -18px; padding: 12px 18px calc(12px + var(--safe-bottom)); bottom: calc(var(--tab-h) + var(--safe-bottom)); border-radius: 0 0 19px 19px; }
  .form-footer-sticky .form-actions { display: grid; grid-template-columns: 1fr 1.5fr; gap: 8px; }
  .form-footer-sticky .form-actions .hint { display: none; }
  .form-footer-sticky .btn { min-height: 45px; }
  .difficulty-picker { gap: 5px; }
  .choice { min-height: 33px; padding: 0 10px; font-size: 11px; }
  .form-section + .form-section { margin-top: 22px; padding-top: 20px; }
  .ocr-panel, .ocr-progress { padding: 18px; }

  .practice-hero { padding: 21px 19px; border-radius: 22px; }
  .practice-hero h1 { font-size: 26px; }
  .practice-hero p { font-size: 11px; }
  .practice-hero__stat { padding: 11px 13px; }
  .practice-hero__stat b { font-size: 26px; }
  .practice-modes { grid-template-columns: 1fr; gap: 10px; margin-top: 11px; }
  .mode-card { padding: 17px; border-radius: 18px; }
  .category-practice { padding: 18px; border-radius: 18px; }
  .topic-grid { grid-template-columns: 1fr 1fr; gap: 6px; }
  .topic-practice-item { padding: 10px; }
  .topic-practice-item b { font-size: 10px; }
  .practice-bottom-note { font-size: 9px; }

  body.focus-mode .view { padding: 14px 11px calc(26px + env(safe-area-inset-bottom, 0px)); }
  .session-top { margin-bottom: 9px; }
  .session-top__meta { font-size: 10px; gap: 6px; }
  .session-progress { margin-bottom: 12px; }
  .practice-card { padding: 17px; border-radius: 18px; }
  .practice-stem { font-size: 17px; line-height: 1.85; }
  .answer-area { margin-top: 18px; padding-top: 16px; }
  .reveal-btn-row .btn { min-width: 0; width: 100%; }
  .judge-grid { grid-template-columns: 1fr; gap: 6px; }
  .judge-btn { display: flex; align-items: center; justify-content: space-between; padding: 10px 13px; text-align: left; }
  .judge-btn b { font-size: 11px; }
  .judge-btn small { margin-top: 0; }
  .result-card { padding: 22px 17px; border-radius: 19px; }
  .result-card h1 { font-size: 23px; }
  .result-stats { gap: 6px; }
  .result-stat { padding: 10px 5px; }
  .result-stat b { font-size: 22px; }
  .result-actions .btn { flex: 1 1 40%; }

  .report-toolbar { margin-bottom: 11px; }
  .report-quote { padding: 19px; border-radius: 19px; }
  .report-quote p { font-size: 17px; }
  .report-kpis { gap: 7px; margin-top: 10px; }
  .kpi { padding: 12px 13px; border-radius: 14px; }
  .kpi__num { font-size: 27px; }
  .report-grid { gap: 10px; margin-top: 10px; }
  .report-col { gap: 10px; }
  .report-card { padding: 17px; border-radius: 18px; }
  .chart-bars { height: 145px; gap: 4px; }
  .donut-wrap { gap: 13px; }
  .donut { width: 112px; height: 112px; }
  .next-grid { grid-template-columns: 1fr; }
  .next-card { padding: 12px; }
  .next-card p { -webkit-line-clamp: 2; }

  .knowledge-hero { padding: 21px 19px; border-radius: 22px; }
  .knowledge-hero h1 { font-size: 26px; }
  .knowledge-hero__art { display: none; }
  .knowledge-grid { grid-template-columns: 1fr 1fr; gap: 8px; margin-top: 11px; }
  .topic-card { min-height: 142px; padding: 13px; border-radius: 15px; }
  .topic-card h2 { font-size: 13px; }
  .topic-card p { font-size: 8px; }
  .topic-card__icon { width: 30px; height: 30px; border-radius: 9px; font-size: 15px; }
  .topic-detail-hero { padding: 21px 19px; border-radius: 22px; }
  .topic-detail-hero h1 { font-size: 27px; }
  .topic-detail-hero > p { font-size: 12px; }
  .topic-detail-stats { gap: 16px; margin-top: 15px; }
  .topic-detail-main, .topic-detail-side { gap: 10px; }
  .topic-detail-side { display: flex; flex-direction: column; }
  .formula-list { grid-template-columns: 1fr; }
  .topic-detail-layout { gap: 10px; margin-top: 10px; }
  .knowledge-cta { font-size: 10px; padding: 12px; }

  .settings-section { padding: 17px; border-radius: 18px; }
  .setting-row { gap: 10px; }
  .setting-row .input { width: 100%; }
  .setting-row .select { width: 120px; }
  .setting-row--stack { flex-direction: column; align-items: stretch; }
  .setting-row--stack .setting-row__value { align-self: flex-start; }
  .ai-grid { grid-template-columns: 1fr; }
  .ai-grid .span-2 { grid-column: auto; }
  .data-actions { flex-direction: column; align-items: stretch; }
  .data-actions .btn { width: 100%; }
  .install-card { flex-wrap: wrap; }
  .install-card .btn { margin-left: 0; width: 100%; }
  .settings-version { flex-wrap: wrap; }

  .modal-backdrop { padding: 0; align-items: end; }
  .modal { width: 100%; max-height: calc(100dvh - 30px); border-radius: 24px 24px 0 0; }
  .modal--sm, .modal--sheet { width: 100%; }
  .modal__head { padding: 15px 17px; }
  .modal__body { padding: 17px; }
  .modal__foot { padding: 11px 17px calc(11px + env(safe-area-inset-bottom)); }
  .image-viewer { align-items: center; padding: 12px; }
  .image-viewer .modal { border-radius: 16px; }
  .qr-box canvas { width: 210px !important; height: 210px !important; }
  #toast-root { inset: auto 0 calc(var(--tab-h) + var(--safe-bottom) + 10px); }
  .scratch-head { padding: 8px 10px; }
  .scratch-head__title { font-size: 11px; }
  .scratch-tool { width: 33px; height: 33px; }
  .scratch-canvas-wrap { padding: 7px; }
  .hide-mobile { display: none; }
}

@media (max-width: 420px) {
  .home-hero h1 { font-size: 27px; }
  .topic-grid { grid-template-columns: 1fr; }
  .report-kpis { grid-template-columns: 1fr 1fr; }
  .q-card__thumb { width: 54px; height: 54px; }
  .detail-actions .btn { flex-basis: 100%; }
  .result-stats { grid-template-columns: 1fr 1fr 1fr; }
  .result-stat b { font-size: 20px; }
  .home-hero .hero-actions .btn { flex: 1; }
  .home-hero .hero-actions .btn--ghost { flex: 0 0 auto; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ---------------- 补充组件（页面级） ---------------- */
.home-empty-wrap { margin-top: 17px; }
.practice-modes { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.mode-card--new {
  border-color: #d5e6dd;
  background: linear-gradient(145deg, #fffdf8, #f0f8f3);
}
.resume-banner {
  display: flex; align-items: center; gap: 12px;
  margin-top: 14px; padding: 14px 16px;
  border-radius: var(--r-md);
  background: var(--paper);
  border: 1px solid #d9e5dc;
  box-shadow: var(--shadow-sm);
}
.resume-banner__icon {
  width: 37px; height: 37px; border-radius: 11px; flex: none;
  display: grid; place-items: center;
  background: var(--green-soft); color: var(--green);
}
.resume-banner__copy { flex: 1; min-width: 0; }
.resume-banner__copy b { display: block; font-size: 12px; }
.resume-banner__copy small { display: block; color: var(--muted); font-size: 9px; margin-top: 2px; }
.resume-banner .btn { flex: none; }

.photo-processing {
  min-height: 290px; display: flex; flex-direction: column; align-items: center; justify-content: center;
  text-align: center; padding: 28px;
}
.photo-processing .ocr-progress__spinner { margin: 0 0 13px; }
.photo-processing h2 { margin: 0 0 4px; font-size: 17px; }
.photo-processing p { margin: 0; color: var(--muted); font-size: 11px; }
.photo-processing .loading-line { width: min(280px, 80%); }

.topic-choice-group { gap: 6px; }
.topic-choice { padding-left: 9px; }
.topic-choice__icon { font-size: 12px; line-height: 1; }
.topic-choice:has(input:checked) .topic-choice__icon { filter: saturate(.8); }

.q-star { color: var(--yellow); display: inline-flex; }
.q-star .icon { fill: currentColor; }
.icon-btn.is-starred { color: #b17b1f; background: var(--yellow-soft); }
.icon-btn.is-starred .icon { fill: currentColor; }

.topic-mini-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }
.topic-mini-grid > .card { margin: 0; }
.knowledge-grid .topic-card { height: 100%; }

.modal--wide { width: min(1000px, 100%); }
.modal--image .modal__head { flex: none; }
.image-viewer .modal__body { min-height: 0; }
.image-viewer .modal__body img { user-select: none; -webkit-user-select: none; }

.bar-track {
  width: 100%; flex: none; height: calc(100% - 18px);
  display: flex; align-items: flex-end; justify-content: center;
}
.bar-stack { height: auto; min-height: 2px; }
.bar-col { gap: 3px; }
.bar-col__label { margin-top: 3px; height: 12px; line-height: 12px; }

.settings-section code {
  font-family: var(--font-mono); font-size: 9px;
  padding: 1px 4px; border-radius: 4px;
  background: #f0ece2; color: #665e50;
}
.form-footer-sticky { bottom: 10px; }

@media (max-width: 960px) {
  .form-footer-sticky { bottom: calc(var(--tab-h) + var(--safe-bottom) + 8px); }
  .topic-mini-grid { grid-template-columns: 1fr; }
}

@media (max-width: 680px) {
  .practice-modes { grid-template-columns: 1fr; }
  .resume-banner { flex-wrap: wrap; }
  .resume-banner__copy { flex-basis: calc(100% - 50px); }
  .resume-banner .btn { flex: 1; }
  .form-footer-sticky { bottom: calc(var(--tab-h) + var(--safe-bottom)); }
  .bar-track { height: calc(100% - 17px); }
  .topic-mini-grid { grid-template-columns: 1fr; }
}

/* ---------------- 云端备份 ---------------- */
.cloud-current { display: flex; flex-direction: column; gap: 13px; }
.cloud-status-line { display: flex; align-items: center; gap: 7px; font-size: 12px; }
.cloud-dot { width: 7px; height: 7px; border-radius: 50%; background: #c9c2b5; flex: none; }
.cloud-dot--green { background: var(--green); box-shadow: 0 0 0 3px rgba(47,107,95,.11); }
.cloud-dot--blue { background: var(--blue); box-shadow: 0 0 0 3px rgba(61,123,143,.11); }
.cloud-dot--orange { background: var(--orange); box-shadow: 0 0 0 3px rgba(213,111,63,.12); }
.cloud-dot--red { background: var(--red); box-shadow: 0 0 0 3px rgba(189,81,69,.1); }
.cloud-status-copy { margin: 4px 0 0; color: var(--muted); font-size: 10px; line-height: 1.65; }
.cloud-key-row {
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
  padding: 10px 12px; border-radius: 10px;
  background: var(--paper-2); border: 1px dashed var(--line-strong);
  color: var(--muted); font-size: 10px;
}
.cloud-key-row code {
  font-family: var(--font-mono); font-size: 11px; color: var(--ink);
  letter-spacing: .04em;
}
.cloud-meta-row { display: flex; justify-content: space-between; gap: 10px; flex-wrap: wrap; color: var(--muted-2); font-size: 9px; }
.cloud-actions { display: flex; align-items: center; gap: 7px; flex-wrap: wrap; margin-top: 2px; }
.cloud-actions .btn { min-height: 34px; font-size: 10px; }
.cloud-note {
  display: flex; align-items: flex-start; gap: 6px;
  margin: 14px 0 0; padding-top: 12px; border-top: 1px dashed var(--line);
  color: var(--muted-2); font-size: 9px; line-height: 1.7;
}
.cloud-note .icon { width: 13px; height: 13px; margin-top: 1px; flex: none; }
.cloud-setup { display: flex; align-items: flex-start; gap: 14px; padding: 15px; border-radius: 13px; background: var(--paper-2); border: 1px solid var(--line); margin-bottom: 13px; }
.cloud-setup__art {
  width: 43px; height: 43px; border-radius: 13px; flex: none;
  display: grid; place-items: center; background: var(--green-soft); color: var(--green);
}
.cloud-setup__art .icon { width: 22px; height: 22px; }
.cloud-setup b { display: block; font-size: 12px; margin-bottom: 3px; }
.cloud-setup p { margin: 0; color: var(--muted); font-size: 10px; line-height: 1.7; }
.cloud-key-card { text-align: center; }
.cloud-key-big {
  margin: 9px 0 12px; padding: 15px 10px;
  border-radius: 12px; border: 1px dashed #d7c8b0;
  background: var(--paper-2);
  font-family: var(--font-mono); font-size: 16px; font-weight: 750;
  letter-spacing: .08em; word-break: break-all; color: var(--ink);
}
.cloud-key-card p { max-width: 360px; margin: 0 auto; color: var(--muted); font-size: 11px; line-height: 1.75; }
.cloud-key-input { font-family: var(--font-mono); letter-spacing: .05em; text-transform: uppercase; }
@media (max-width: 680px) {
  .cloud-setup { gap: 10px; padding: 12px; }
  .cloud-key-row { align-items: flex-start; }
  .cloud-actions { display: grid; grid-template-columns: 1fr 1fr; }
  .cloud-actions .btn { width: 100%; }
  .cloud-actions .btn--text { grid-column: 1 / -1; }
  .cloud-key-big { font-size: 13px; }
}

/* ---------------- 打印 ---------------- */
@media print {
  @page { margin: 14mm; }
  body { background: #fff !important; color: #111; font-size: 12px; }
  .sidebar, .tabbar, .mobile-topbar, .report-toolbar, .report-actions,
  .page-actions, .toast, #toast-root, .modal-backdrop { display: none !important; }
  .shell { display: block; }
  .view { max-width: none; padding: 0; }
  .card, .kpi, .report-card, .report-quote { box-shadow: none !important; break-inside: avoid; }
  .report-grid { display: block; }
  .report-col { display: block; }
  .report-card { margin-top: 12px; page-break-inside: avoid; }
  .report-quote p { font-size: 15px; }
  a { color: inherit; }
}