/* ============================================================
   ChinoEasy · 瑞士编辑 Swiss Editorial（teal）
   系统声明：
     字体   单一无衬线 Archivo（中文走系统黑体）· 权重对比靠粗体，不用颜色
     颜色   近黑 #171412 压奶油底 #FAF7F0 · teal #0F766E 只点序号与 CTA
     布局   严格左对齐网格 · 发丝线分节 · 编号章节 · 大量留白 · 直角
     签名   超大大写标签（字距拉开）· 发丝线 · 序号 01/02/03
   ============================================================ */

:root {
  color-scheme: light;
  --paper: #faf7f0;
  --paper-2: #f2eee3;
  --ink: #171412;
  --ink-2: #57514a;
  --ink-3: #8a8277;
  --accent: #0f766e;
  --accent-deep: #115e59;
  --accent-ink: #f0fdfa;
  --line: #d8d2c5;
  --good: #2f6b4f;
  --warn: #8a6b2f;
  --font-display: "Archivo", "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Archivo", -apple-system, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --paper: #16130f;
  --paper-2: #1d1a15;
  --ink: #ece5d6;
  --ink-2: #b8ae9c;
  --ink-3: #857b6b;
  --accent: #2dd4bf;
  --accent-deep: #14b8a6;
  --accent-ink: #042f2e;
  --line: #2e2920;
  --good: #5fa97e;
  --warn: #c7a45c;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --paper: #16130f;
    --paper-2: #1d1a15;
    --ink: #ece5d6;
    --ink-2: #b8ae9c;
    --ink-3: #857b6b;
    --accent: #2dd4bf;
    --accent-deep: #14b8a6;
    --accent-ink: #042f2e;
    --line: #2e2920;
    --good: #5fa97e;
    --warn: #c7a45c;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
#app { max-width: 640px; margin: 0 auto; padding: 24px 22px 72px; min-height: 100vh; }

/* ---------- 顶栏 ---------- */
.topbar { display: flex; justify-content: space-between; align-items: center; padding-bottom: 16px; border-bottom: 1px solid var(--ink); margin-bottom: 0; }
.brand-logo { height: 30px; width: auto; display: block; }
.top-actions { display: flex; align-items: center; gap: 12px; }
.theme-btn { border: none; background: transparent; color: var(--ink-2); cursor: pointer; padding: 4px 6px; line-height: 1; display: inline-flex; align-items: center; }
.theme-btn:hover { color: var(--ink); }
.lang-toggle { display: inline-flex; gap: 2px; }
.lang-toggle button {
  border: none; background: transparent; color: var(--ink-3);
  padding: 4px 8px; font-size: 12px; font-weight: 600; cursor: pointer; letter-spacing: .04em;
  text-transform: uppercase;
}
.lang-toggle button.active { color: var(--ink); }

/* ---------- 落地页 ---------- */
.landing { padding-top: 48px; }
.eyebrow { font-size: 11px; letter-spacing: .24em; text-transform: uppercase; color: var(--ink-2); font-weight: 600; margin: 0 0 22px; }
.eyebrow::before { content: ""; display: inline-block; width: 22px; height: 2px; background: var(--accent); vertical-align: middle; margin-right: 10px; }
.landing h1 {
  font-family: var(--font-display);
  font-size: clamp(34px, 9vw, 50px);
  font-weight: 700;
  line-height: 1.04;
  letter-spacing: -0.02em;
  margin: 0 0 18px;
}
.landing .subtitle { color: var(--ink-2); font-size: 16px; line-height: 1.6; margin: 0 0 36px; max-width: 34em; }
.points { list-style: none; margin: 0 0 40px; padding: 0; border-top: 1px solid var(--ink); }
.points li { display: flex; gap: 20px; align-items: baseline; padding: 16px 0; border-bottom: 1px solid var(--line); font-size: 15px; font-weight: 500; }
.points li .num { font-family: var(--font-display); font-weight: 700; color: var(--accent); font-size: 16px; min-width: 34px; font-variant-numeric: tabular-nums; }
.btn-primary {
  display: inline-block; background: var(--accent); color: var(--accent-ink);
  border: none; border-radius: 0; padding: 16px 34px;
  font-size: 14px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase;
  cursor: pointer; text-decoration: none; font-family: var(--font-body);
}
.btn-primary:hover { background: var(--accent-deep); }
.btn-primary:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; }
.footer-note { color: var(--ink-3); font-size: 11.5px; margin-top: 44px; border-top: 1px solid var(--line); padding-top: 16px; }

/* ---------- 通用屏幕 ---------- */
.screen { padding-top: 32px; }
.screen h2 { font-family: var(--font-display); font-size: 26px; font-weight: 700; margin: 0 0 8px; letter-spacing: -0.01em; }
.screen .subheading { color: var(--ink-2); margin: 0 0 32px; font-size: 14px; }
.field { margin-bottom: 32px; }
.field label { display: block; font-weight: 600; font-size: 13px; margin-bottom: 12px; color: var(--ink-2); letter-spacing: .03em; text-transform: uppercase; }
.option-list { display: grid; gap: 10px; }
.option-btn {
  text-align: left; background: transparent; border: 1px solid var(--line); border-radius: 0;
  padding: 14px 16px; font-size: 15px; color: var(--ink); cursor: pointer; font-family: var(--font-body);
  transition: border-color .15s;
}
.option-btn:hover { border-color: var(--ink); }
.option-btn.selected { border-color: var(--accent); color: var(--accent); font-weight: 600; }
.option-btn:focus-visible { outline: 2px solid var(--ink); outline-offset: 2px; }
select.field-select {
  width: 100%; padding: 13px 15px; font-size: 15px; border-radius: 0;
  border: 1px solid var(--line); background: var(--paper); color: var(--ink); font-family: var(--font-body);
  appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, var(--ink-3) 50%), linear-gradient(135deg, var(--ink-3) 50%, transparent 50%);
  background-position: calc(100% - 18px) 50%, calc(100% - 12px) 50%;
  background-size: 5px 5px; background-repeat: no-repeat;
}

/* ---------- 答题页 ---------- */
.progress-wrap { margin-bottom: 28px; }
.progress-track { height: 3px; background: var(--line); overflow: hidden; }
.progress-fill { height: 100%; background: var(--accent); transition: width .4s ease; }
.progress-label { font-size: 10.5px; color: var(--ink-3); margin-top: 8px; letter-spacing: .1em; text-transform: uppercase; }
.q-image { text-align: left; margin: 6px 0 20px; }
.q-image img { max-width: 100%; max-height: 320px; border: 1px solid var(--line); background: #fff; }
.question-stem { font-size: 22px; line-height: 1.6; margin: 6px 0 10px; white-space: pre-line; font-weight: 600; color: var(--ink); }
.question-stem.multiline { background: var(--paper-2); border-left: 3px solid var(--accent); padding: 14px 16px; font-size: 18px; }
.stem-note { color: var(--ink-2); font-size: 13px; margin: 0 0 20px; }
.passage { background: var(--paper-2); border: 1px solid var(--line); padding: 16px 18px; font-size: 14px; color: var(--ink-2); margin-bottom: 20px; white-space: pre-line; }
.passage details summary { cursor: pointer; font-weight: 600; color: var(--ink); font-size: 12px; letter-spacing: .06em; text-transform: uppercase; }
.passage .same { color: var(--ink-3); font-size: 11px; margin-bottom: 8px; }
.options { display: grid; gap: 12px; margin-top: 14px; }
.options .option-btn { font-size: 16px; padding: 16px 18px; }
.options.hidden { display: none; }
.audio-box { text-align: left; margin: 16px 0; }
.audio-box .play-btn { background: transparent; border: 1px solid var(--accent); color: var(--accent); font-weight: 600; padding: 12px 28px; font-size: 14px; cursor: pointer; font-family: var(--font-body); letter-spacing: .06em; text-transform: uppercase; }
.audio-box .play-btn:hover { background: var(--accent); color: var(--accent-ink); }
.audio-box .play-btn:disabled { opacity: .4; cursor: not-allowed; }
.audio-box .audio-msg { color: var(--ink-3); font-size: 12px; margin-top: 10px; }
.skip-link { background: none; border: none; color: var(--ink-3); text-decoration: underline; text-underline-offset: 3px; cursor: pointer; font-size: 13px; margin-top: 16px; }
.toast { border: 1px solid var(--line); padding: 12px 16px; color: var(--ink-2); font-size: 13px; margin-bottom: 20px; background: var(--paper-2); }

/* ---------- 邮箱采集 ---------- */
.email-form { padding-top: 6px; }
.email-form input { width: 100%; padding: 14px 16px; font-size: 15px; border-radius: 0; border: 1px solid var(--line); background: var(--paper); color: var(--ink); margin-bottom: 14px; font-family: var(--font-body); }
.email-form input:focus-visible { outline: 2px solid var(--ink); outline-offset: 2px; }
.privacy-note { color: var(--ink-3); font-size: 12px; margin: 14px 0 24px; }
.field-error { color: var(--accent); font-size: 12px; margin-top: 6px; }

/* ---------- 结果页 ---------- */
.result { padding-top: 24px; }
.level-card { padding: 36px 0; margin-bottom: 8px; border-bottom: 1px solid var(--ink); }
.level {
  font-family: var(--font-display); font-size: 64px; font-weight: 700; line-height: 1;
  color: var(--ink); margin: 0 0 14px; letter-spacing: -0.02em;
}
.level-sub { color: var(--ink-2); font-size: 14px; }
.card { border-top: 1px solid var(--ink); padding: 24px 0 8px; margin-top: 8px; }
.card h3 { font-family: var(--font-display); margin: 0 0 14px; font-size: 13px; font-weight: 700; letter-spacing: .12em; color: var(--ink-2); text-transform: uppercase; }
.card p { margin: 0 0 8px; color: var(--ink); }
.card p:last-child { margin-bottom: 0; }
.card .caveat { color: var(--ink-3); font-size: 12px; }

/* 能力分布条 */
.bar-row { display: grid; grid-template-columns: 96px 1fr 44px; gap: 14px; align-items: center; margin-bottom: 14px; font-size: 13px; }
.bar-row .cat { color: var(--ink-2); font-weight: 600; }
.bar-track { height: 8px; background: var(--line); overflow: hidden; }
.bar-fill { height: 100%; background: var(--accent); transition: width .6s ease; }
.bar-row .val { text-align: right; color: var(--ink); font-variant-numeric: tabular-nums; font-weight: 700; }
.tag-row { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 10px; }
.tag { display: inline-block; padding: 3px 10px; font-size: 11.5px; font-weight: 600; border: 1px solid var(--line); }
.tag.good { color: var(--good); border-color: var(--good); }
.tag.warn { color: var(--warn); border-color: var(--warn); }

.course-card { border-top: 1px solid var(--ink); }
.course-price { font-family: var(--font-display); font-size: 30px; font-weight: 700; }
.course-price span { font-size: 13px; color: var(--ink-3); font-weight: 400; }
.btn-secondary {
  display: inline-block; margin-top: 14px; background: transparent; color: var(--accent);
  border: 1px solid var(--accent); padding: 13px 28px;
  font-size: 13px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; cursor: pointer; text-decoration: none; font-family: var(--font-body);
}
.btn-secondary:hover { background: var(--accent); color: var(--accent-ink); }

/* ---------- 隐私页 ---------- */
.privacy { max-width: 640px; margin: 0 auto; padding: 36px 22px 72px; }
.privacy h1 { font-family: var(--font-display); font-size: 30px; font-weight: 700; }
.privacy h2 { font-family: var(--font-display); font-size: 18px; margin-top: 30px; font-weight: 700; }
.privacy p { color: var(--ink); font-size: 14px; }
.privacy hr { border: none; border-top: 1px solid var(--line); margin: 32px 0; }
.lang-note { color: var(--ink-3); font-size: 12px; }

.loading, .error { text-align: center; color: var(--ink-3); padding: 70px 0; font-size: 14px; }

@media (prefers-reduced-motion: reduce) { *, *::before, *::after { transition: none !important; } }

/* ---------- 响应式 ---------- */
@media (max-width: 375px) {
  #app { padding: 18px 16px 60px; }
  .landing h1 { font-size: 32px; }
  .level { font-size: 54px; }
  .bar-row { grid-template-columns: 80px 1fr 40px; }
}

/* ---------- 结果页吸底 CTA（仅移动端）---------- */
.sticky-cta { display: none; }
@media (max-width: 480px) {
  .result { padding-bottom: 76px; }
  .sticky-cta {
    display: block; position: fixed; left: 0; right: 0; bottom: 0; z-index: 20;
    padding: 12px 16px calc(12px + env(safe-area-inset-bottom));
    background: var(--paper); border-top: 1px solid var(--line);
  }
  .sticky-cta .btn-primary { display: block; width: 100%; text-align: center; }
}