/* ===========================================================
   小小影视 · 单页站点样式
   主题：深海军蓝 + 珊瑚红 + 雾蓝底，衬线标题的放映厅气质
   =========================================================== */

/* ---------- 1. 变量 ---------- */
:root {
  --bg: #f2f5f9;
  --mist: #eaf0f6;
  --surface: #ffffff;
  --ink: #0e2233;
  --ink-2: #1c3a52;
  --muted: #65798c;
  --faint: #90a2b2;
  --line: #dae3ec;
  --line-soft: #e8eef4;
  --coral: #ff5c4d;
  --coral-deep: #e4412f;
  --coral-soft: #ffe7e3;
  --gold: #c8a15c;

  --serif: "Songti SC", "Noto Serif SC", "Source Han Serif SC", "SimSun", serif;
  --sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Consolas, "Courier New", monospace;

  --r: 4px;
  --shadow-s: 0 1px 2px rgba(14, 34, 51, 0.06);
  --shadow-m: 0 20px 40px -28px rgba(14, 34, 51, 0.35);
  --shadow-l: 0 40px 70px -40px rgba(14, 34, 51, 0.45);
  --ease: cubic-bezier(0.22, 0.6, 0.36, 1);
}

/* ---------- 2. 基础 ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4, p, ul, ol, figure { margin: 0; }
ul, ol { list-style: none; padding: 0; }
button { font: inherit; color: inherit; }

::selection { background: var(--coral-soft); color: var(--ink); }

:focus-visible {
  outline: 2px solid var(--coral);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 99;
  padding: 10px 18px;
  background: var(--coral);
  color: #fff;
  font-size: 13px;
}
.skip-link:focus { left: 0; }

/* ---------- 3. 容器与按钮 ---------- */
.container { width: min(1180px, 100% - 48px); margin-inline: auto; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border: 1px solid transparent;
  border-radius: var(--r);
  font-size: 14.5px;
  font-weight: 600;
  letter-spacing: 0.02em;
  white-space: nowrap;
  cursor: pointer;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease),
              border-color 0.2s var(--ease), transform 0.2s var(--ease),
              box-shadow 0.2s var(--ease);
}

.btn-primary {
  background: var(--coral);
  border-color: var(--coral);
  color: #fff;
  box-shadow: 0 10px 22px -14px rgba(255, 92, 77, 0.9);
}
.btn-primary:hover {
  background: var(--coral-deep);
  border-color: var(--coral-deep);
  transform: translateY(-2px);
  box-shadow: 0 14px 26px -14px rgba(228, 65, 47, 0.85);
}

.btn-ghost {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.32);
  color: #f3f7fb;
}
.btn-ghost:hover {
  border-color: rgba(255, 255, 255, 0.72);
  background: rgba(255, 255, 255, 0.08);
}

.btn-lg { padding: 15px 32px; font-size: 15.5px; }

/* ---------- 4. 头部 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: var(--ink);
  transition: box-shadow 0.3s var(--ease), background-color 0.3s var(--ease);
}
.site-header.is-scrolled {
  background: #0a1a28;
  box-shadow: 0 16px 30px -24px rgba(0, 0, 0, 0.9);
}

.nav {
  display: flex;
  align-items: center;
  gap: 26px;
  height: 72px;
}

.brand { display: inline-flex; align-items: center; gap: 11px; flex: 0 0 auto; }
.brand img {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: #fff;
  padding: 2px;
}
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-name { font-family: var(--serif); font-size: 20px; font-weight: 700; letter-spacing: 0.04em; color: #fff; }
.brand-sub {
  font-family: var(--mono);
  font-size: 8.5px;
  letter-spacing: 0.22em;
  color: rgba(255, 255, 255, 0.5);
}

.nav-links { margin-left: auto; }
.nav-list { display: flex; align-items: center; gap: 26px; }
.nav-list a {
  position: relative;
  display: block;
  padding: 6px 0;
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.72);
  transition: color 0.2s var(--ease);
}
.nav-list a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: var(--coral);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s var(--ease);
}
.nav-list a:hover { color: #fff; }
.nav-list a:hover::after { transform: scaleX(1); }

.nav-actions { display: flex; align-items: center; gap: 10px; }
.nav-cta { padding: 9px 20px; font-size: 13.5px; }

.nav-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: var(--r);
  background: transparent;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  width: 16px;
  height: 2px;
  background: #fff;
  transition: transform 0.25s var(--ease), opacity 0.2s var(--ease);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav-panel {
  padding: 4px 24px 22px;
  background: #0a1a28;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}
.nav-panel ul { display: grid; gap: 2px; }
.nav-panel ul a {
  display: block;
  padding: 12px 0;
  font-size: 15px;
  color: rgba(255, 255, 255, 0.76);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.nav-panel .btn { width: 100%; margin-top: 18px; }

/* ---------- 5. 首屏 ---------- */
.hero {
  position: relative;
  overflow: hidden;
  padding: 74px 0 80px;
  background:
    radial-gradient(120% 100% at 92% -10%, rgba(255, 92, 77, 0.22), transparent 58%),
    linear-gradient(180deg, #0e2233 0%, #0b1c2a 100%);
  color: #f4f8fb;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(0, 0.96fr);
  gap: 56px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 26px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: rgba(255, 255, 255, 0.62);
  text-transform: uppercase;
}
.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--coral);
}

.hero-copy h1 {
  font-family: var(--serif);
  font-size: clamp(54px, 7vw, 94px);
  font-weight: 700;
  line-height: 1.02;
  letter-spacing: 0.02em;
  margin-bottom: 26px;
}

.lede {
  max-width: 42ch;
  font-size: 16px;
  line-height: 1.95;
  color: rgba(244, 248, 251, 0.72);
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 32px 0 26px; }

.hero-meta { display: flex; flex-wrap: wrap; gap: 10px 22px; }
.hero-meta li {
  position: relative;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: rgba(244, 248, 251, 0.56);
}
.hero-meta li + li::before {
  content: "/";
  position: absolute;
  left: -13px;
  color: rgba(255, 255, 255, 0.28);
}

/* 海报架 */
.hero-visual { position: relative; }

.shelf {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  align-items: start;
}

.shelf-card {
  border: 4px solid rgba(255, 255, 255, 0.92);
  border-radius: 2px;
  background: #0a1a28;
  overflow: hidden;
  box-shadow: 0 30px 46px -26px rgba(0, 0, 0, 0.9);
  transition: transform 0.35s var(--ease);
}
.shelf-card img { width: 100%; height: auto; aspect-ratio: 3 / 4; object-fit: cover; }
.shelf-card figcaption {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 9px 9px;
  font-size: 11.5px;
  letter-spacing: 0.02em;
  color: rgba(255, 255, 255, 0.82);
  background: rgba(0, 0, 0, 0.35);
}
.shelf-card figcaption b {
  font-family: var(--mono);
  font-size: 9.5px;
  font-weight: 700;
  color: var(--coral);
}

.shelf .shelf-card:nth-child(2) { margin-top: 26px; }
.shelf .shelf-card:nth-child(3) { margin-top: 52px; }

.shelf:hover .shelf-card { transform: translateY(-3px); }

.shelf-note {
  margin-top: 22px;
  padding-top: 12px;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  color: rgba(255, 255, 255, 0.45);
}

/* ---------- 6. 数据条 ---------- */
.stats {
  background: var(--surface);
  border-bottom: 1px solid var(--line);
}
.stats-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); }
.stat { padding: 24px 0 22px; }
.stat + .stat { padding-left: 36px; border-left: 1px solid var(--line-soft); }
.stat b {
  display: block;
  font-family: var(--serif);
  font-size: 34px;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: 0.01em;
}
.stat span {
  display: block;
  margin-top: 4px;
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--faint);
}

/* ---------- 7. 区块 ---------- */
.section { padding: 90px 0; }
.section-mist {
  background: var(--mist);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.section-night { background: var(--ink); color: #f4f8fb; }

.sec-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 36px;
  margin-bottom: 40px;
}
.sec-index {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.18em;
  color: var(--coral-deep);
}
.sec-index::before { content: ""; width: 18px; height: 1px; background: var(--coral); }

.sec-title {
  font-family: var(--serif);
  font-size: clamp(27px, 3vw, 39px);
  font-weight: 700;
  line-height: 1.34;
  letter-spacing: 0.02em;
  margin-bottom: 14px;
}
.sec-desc { max-width: 62ch; font-size: 14.5px; line-height: 1.9; color: var(--muted); }

.section-night .sec-title { color: #f4f8fb; }
.section-night .sec-desc { color: rgba(244, 248, 251, 0.62); }
.section-night .sec-index { color: #ff8b7f; }

.sec-link {
  padding-bottom: 4px;
  border-bottom: 1px solid var(--line);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--ink-2);
  white-space: nowrap;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.sec-link:hover { color: var(--coral-deep); border-bottom-color: var(--coral); }
.sec-link-light { color: rgba(244, 248, 251, 0.7); border-bottom-color: rgba(255, 255, 255, 0.2); }
.sec-link-light:hover { color: #fff; border-bottom-color: var(--coral); }

/* ---------- 8. 功能 bento ---------- */
.bento {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  grid-template-areas:
    "a a b c"
    "d d e f";
  gap: 14px;
}

.feature {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 26px 24px 28px;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: var(--surface);
  box-shadow: var(--shadow-s);
  transition: border-color 0.2s var(--ease), box-shadow 0.25s var(--ease), transform 0.25s var(--ease);
}
.feature:hover {
  border-color: #c3d2df;
  box-shadow: var(--shadow-m);
  transform: translateY(-3px);
}
.feature:nth-child(1) { grid-area: a; }
.feature:nth-child(2) { grid-area: d; }
.feature:nth-child(3) { grid-area: b; }
.feature:nth-child(4) { grid-area: c; }
.feature:nth-child(5) { grid-area: e; }
.feature:nth-child(6) { grid-area: f; }

.feature-num {
  position: absolute;
  top: 26px;
  right: 24px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  color: var(--faint);
}
.feature-icon {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  margin-bottom: 18px;
  border: 1px solid var(--line);
  border-radius: var(--r);
  color: var(--coral-deep);
  background: #fbfdff;
}
.feature-icon svg { width: 21px; height: 21px; }
.feature h3 { margin-bottom: 8px; font-size: 16.5px; font-weight: 700; letter-spacing: 0.01em; }
.feature p { font-size: 13px; line-height: 1.9; color: var(--muted); }

.feature-wide { padding: 32px 30px 32px; }
.feature-wide h3 { font-family: var(--serif); font-size: 20px; }
.feature-wide p { font-size: 13.5px; max-width: 52ch; }

.feature-list {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 18px;
}
.feature-list li {
  padding: 4px 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 11.5px;
  color: var(--ink-2);
  background: #f8fbfe;
}

/* ---------- 9. 本周上新 ---------- */
.picks-grid { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 14px; }

.pick { min-width: 0; }
.pick-media {
  position: relative;
  aspect-ratio: 3 / 4;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 2px;
  background: #0a1a28;
}
.pick-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.45s var(--ease);
}
.pick:hover .pick-media img { transform: scale(1.04); }

.pick-badge {
  position: absolute;
  top: 8px;
  left: 8px;
  padding: 3px 8px;
  border-radius: 2px;
  background: var(--coral);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: #fff;
}
.pick-score {
  position: absolute;
  right: 8px;
  bottom: 8px;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--gold);
  text-shadow: 0 1px 6px rgba(0, 0, 0, 0.7);
}

.pick h3 {
  margin-top: 12px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: #f4f8fb;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.pick p {
  margin-top: 2px;
  font-size: 11px;
  color: rgba(244, 248, 251, 0.5);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.pick-more {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 10px;
  aspect-ratio: 3 / 4;
  padding: 18px 16px;
  border: 1px solid rgba(255, 92, 77, 0.45);
  border-radius: 2px;
  background: linear-gradient(160deg, rgba(255, 92, 77, 0.16), rgba(255, 92, 77, 0.04));
  transition: border-color 0.25s var(--ease), background-color 0.25s var(--ease), transform 0.25s var(--ease);
}
.pick-more:hover {
  border-color: var(--coral);
  transform: translateY(-3px);
}
.pick-more span {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  color: rgba(255, 255, 255, 0.55);
}
.pick-more b {
  font-size: 14px;
  font-weight: 600;
  line-height: 1.7;
  color: #fff;
}
.pick-more i {
  font-family: var(--mono);
  font-size: 18px;
  font-style: normal;
  color: var(--coral);
}

/* ---------- 10. 片库分类 ---------- */
.filter-row { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 24px; }
.filter-btn {
  padding: 7px 16px;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: var(--surface);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--muted);
  cursor: pointer;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.filter-btn:hover { border-color: var(--coral); color: var(--coral-deep); }
.filter-btn[aria-pressed="true"] {
  background: var(--ink);
  border-color: var(--ink);
  color: #fff;
}

.index-list { border-top: 1px solid var(--line); }
.index-row {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr) 156px 110px;
  align-items: center;
  gap: 20px;
  padding: 19px 12px;
  border-bottom: 1px solid var(--line);
  transition: background-color 0.2s var(--ease), padding-left 0.2s var(--ease);
}
.index-row[hidden] { display: none; }
.index-row:hover { background: var(--surface); padding-left: 18px; }
.index-no {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--coral-deep);
}
.index-name b { display: block; font-size: 15.5px; font-weight: 700; }
.index-name em {
  display: block;
  margin-top: 2px;
  font-size: 11.5px;
  font-style: normal;
  letter-spacing: 0.02em;
  color: var(--muted);
}
.index-cadence { font-size: 12px; color: var(--ink-2); }
.index-count {
  justify-self: end;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink);
}

/* ---------- 11. 安装步骤 ---------- */
.steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.step {
  position: relative;
  padding: 34px 26px 28px;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: var(--surface);
  overflow: hidden;
}
.step-no {
  font-family: var(--serif);
  font-size: 44px;
  font-weight: 700;
  line-height: 1;
  color: var(--coral-soft);
}
.step h3 { margin: 10px 0 10px; font-size: 17px; font-weight: 700; }
.step p { font-size: 13px; line-height: 1.9; color: var(--muted); }

/* ---------- 12. 设备 ---------- */
.device-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.device {
  padding: 24px 24px 22px;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: var(--surface);
  transition: border-color 0.2s var(--ease), box-shadow 0.25s var(--ease);
}
.device:hover { border-color: #c3d2df; box-shadow: var(--shadow-m); }
.device h3 { font-family: var(--serif); font-size: 18px; font-weight: 700; letter-spacing: 0.03em; }
.device p { margin: 6px 0 14px; font-size: 12px; line-height: 1.8; color: var(--muted); }
.spec-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  padding: 8px 0;
  border-top: 1px solid var(--line-soft);
  font-size: 11.5px;
}
.spec-row span { color: var(--faint); }
.spec-row b { font-weight: 600; color: var(--ink); text-align: right; }

/* ---------- 13. 问答 ---------- */
.faq { display: grid; gap: 1px; max-width: 940px; background: var(--line); border: 1px solid var(--line); }
.faq details { background: var(--surface); }
.faq details[open] { background: #fbfdff; }
.faq summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  padding: 19px 24px;
  font-size: 14.5px;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::marker { content: ""; }
.plus {
  position: relative;
  flex: 0 0 auto;
  width: 20px;
  height: 20px;
  border: 1px solid var(--line);
  border-radius: 2px;
  transition: background-color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.plus::before,
.plus::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 8px;
  height: 1px;
  margin: -0.5px 0 0 -4px;
  background: var(--muted);
  transition: transform 0.3s var(--ease), background-color 0.2s var(--ease);
}
.plus::after { transform: rotate(90deg); }
details[open] .plus { background: var(--coral); border-color: var(--coral); }
details[open] .plus::before,
details[open] .plus::after { background: #fff; }
details[open] .plus::after { transform: rotate(0deg); }
.faq-body {
  padding: 0 24px 22px;
  font-size: 13px;
  line-height: 2;
  color: var(--muted);
}

/* ---------- 14. 留言 ---------- */
.comment-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.comment {
  padding: 26px 24px 24px;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: var(--surface);
  transition: transform 0.2s var(--ease), box-shadow 0.25s var(--ease);
}
.comment:hover { transform: translateY(-3px); box-shadow: var(--shadow-m); }
.comment-head { display: flex; align-items: center; gap: 11px; margin-bottom: 14px; }
.avatar {
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--coral-soft);
  color: var(--coral-deep);
  font-family: var(--serif);
  font-size: 15px;
  font-weight: 700;
}
.comment-name { font-size: 13.5px; font-weight: 600; line-height: 1.5; }
.comment-meta {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.06em;
  color: var(--faint);
  line-height: 1.6;
}
.comment > p { font-size: 13px; line-height: 1.95; color: var(--muted); }
.comment-foot {
  display: flex;
  gap: 18px;
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid var(--line-soft);
  font-size: 11px;
  color: var(--faint);
}

/* ---------- 15. 下载区 ---------- */
.cta-wrap { padding: 0 0 88px; }
.cta {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) auto;
  align-items: center;
  gap: 46px;
  padding: 52px 52px 50px;
  border-radius: var(--r);
  background:
    radial-gradient(88% 100% at 100% 0%, rgba(255, 92, 77, 0.2), transparent 56%),
    var(--ink);
  color: #f4f8fb;
  box-shadow: var(--shadow-l);
}
.cta-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: rgba(255, 255, 255, 0.5);
}
.cta-kicker::before { content: ""; width: 22px; height: 1px; background: var(--coral); }
.cta-copy h2 {
  font-family: var(--serif);
  font-size: clamp(26px, 3.1vw, 38px);
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 0.02em;
  margin-bottom: 12px;
  color: #fff;
}
.cta-copy p { max-width: 46ch; font-size: 13.5px; line-height: 1.9; color: rgba(244, 248, 251, 0.62); }
.cta-action { display: flex; flex-direction: column; align-items: flex-start; gap: 12px; }
.cta-note {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.5);
}

/* ---------- 16. 页脚 ---------- */
.footer { padding: 54px 0 38px; background: var(--mist); border-top: 1px solid var(--line); }
.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) repeat(2, minmax(0, 0.7fr));
  gap: 40px;
}
.brand-light .brand-name { color: var(--ink); }
.brand-light .brand-sub { color: var(--faint); }
.brand-light img { background: transparent; padding: 0; }
.footer-brand p {
  max-width: 36ch;
  margin-top: 16px;
  font-size: 12px;
  line-height: 1.95;
  color: var(--muted);
}
.footer-col h3 {
  margin-bottom: 12px;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 400;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--faint);
}
.footer-col ul { display: grid; gap: 7px; }
.footer-col a { font-size: 12.5px; color: var(--ink-2); transition: color 0.2s var(--ease); }
.footer-col a:hover { color: var(--coral-deep); }

.copy {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: 40px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.04em;
  color: var(--faint);
}

/* ---------- 17. 响应式 ---------- */
@media (max-width: 1100px) {
  .picks-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
  .bento {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    grid-template-areas:
      "a a"
      "d d"
      "b c"
      "e f";
  }
  .device-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .cta { grid-template-columns: minmax(0, 1fr); gap: 26px; padding: 42px 36px; }
  .index-row { grid-template-columns: 44px minmax(0, 1fr) 130px 96px; gap: 14px; }
}

@media (max-width: 900px) {
  .hero-grid { grid-template-columns: minmax(0, 1fr); gap: 46px; }
  .shelf { max-width: 520px; }
  .nav-links { display: none; }
  .nav-cta { display: none; }
  .nav-toggle { display: flex; }
  .nav { height: 64px; }
  .nav-actions { margin-left: auto; }
  .steps { grid-template-columns: minmax(0, 1fr); gap: 12px; }
  .comment-grid { grid-template-columns: minmax(0, 1fr); }
  .sec-head { grid-template-columns: minmax(0, 1fr); align-items: start; gap: 16px; }
  .stats-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stat + .stat { padding-left: 0; border-left: 0; }
  .stats-grid .stat:nth-child(even) { padding-left: 26px; border-left: 1px solid var(--line-soft); }
  .stats-grid .stat:nth-child(n + 3) { border-top: 1px solid var(--line-soft); }
  .section { padding: 64px 0; }
  .hero { padding: 52px 0 60px; }
  .index-row { grid-template-columns: 42px minmax(0, 1fr) 96px; }
  .index-cadence { display: none; }
}

@media (max-width: 640px) {
  .container { width: min(1180px, 100% - 32px); }
  .brand-sub { display: none; }
  .hero-copy h1 { font-size: 56px; }
  .lede { font-size: 14.5px; }
  .hero-actions .btn { width: 100%; }
  .shelf { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; }
  .shelf-card { border-width: 3px; }
  .shelf-card figcaption { font-size: 10px; padding: 6px 6px 7px; }
  .shelf .shelf-card:nth-child(2) { margin-top: 14px; }
  .shelf .shelf-card:nth-child(3) { margin-top: 28px; }
  .picks-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .pick-more { aspect-ratio: 3 / 4; padding: 14px 12px; }
  .bento {
    grid-template-columns: minmax(0, 1fr);
    grid-template-areas: "a" "b" "c" "d" "e" "f";
    gap: 10px;
  }
  .feature-wide { padding: 26px 22px; }
  .device-grid { grid-template-columns: minmax(0, 1fr); }
  .index-row { grid-template-columns: 34px minmax(0, 1fr) 82px; padding: 15px 6px; }
  .index-count { font-size: 11px; }
  .faq summary { padding: 16px 18px; font-size: 13.5px; }
  .faq-body { padding: 0 18px 18px; }
  .cta { padding: 30px 22px 28px; }
  .cta-copy h2 { font-size: 24px; }
  .cta-action { width: 100%; }
  .cta-action .btn { width: 100%; }
  .footer-grid { grid-template-columns: minmax(0, 1fr); gap: 26px; }
}

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