/* ===========================================================
   电视家 · 单页站点样式
   主题：暖纸底 + 深松绿 + 陶土橘（浅色调，编辑部排版感）
   =========================================================== */

/* ---------- 1. 设计变量 ---------- */
:root {
  --paper: #fbf9f4;
  --paper-2: #f3efe6;
  --surface: #ffffff;
  --ink: #16211d;
  --ink-2: #4c5a54;
  --ink-3: #7e8b85;
  --line: #e2dccf;
  --line-soft: #efeae0;
  --brand: #0f6f5c;
  --brand-2: #0a5143;
  --brand-soft: #e7f1ec;
  --accent: #d9663d;
  --accent-soft: #faede6;

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

  --radius-sm: 12px;
  --radius-md: 18px;
  --radius-lg: 26px;
  --shadow-sm: 0 6px 18px -12px rgba(22, 33, 29, 0.35);
  --shadow-md: 0 24px 52px -34px rgba(22, 33, 29, 0.4);
  --shadow-lg: 0 40px 80px -46px rgba(22, 33, 29, 0.45);
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
}

body {
  margin: 0;
  background-color: var(--paper);
  background-image:
    radial-gradient(1100px 620px at 88% -6%, rgba(15, 111, 92, 0.07), transparent 62%),
    radial-gradient(820px 520px at 4% 12%, rgba(217, 102, 61, 0.05), transparent 60%);
  background-repeat: no-repeat;
  color: var(--ink);
  font-family: var(--font-body);
  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: rgba(15, 111, 92, 0.16); }

:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 3px;
  border-radius: 6px;
}

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

/* ---------- 3. 通用容器与按钮 ---------- */
.container {
  width: min(1160px, 100% - 48px);
  margin-inline: auto;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 13px 26px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.02em;
  cursor: pointer;
  white-space: nowrap;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease),
              background-color 0.25s var(--ease), border-color 0.25s var(--ease), color 0.25s var(--ease);
}

.btn-primary {
  background: linear-gradient(135deg, #12806a 0%, var(--brand-2) 100%);
  color: #fff;
  box-shadow: 0 14px 28px -16px rgba(10, 81, 67, 0.85);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 34px -16px rgba(10, 81, 67, 0.9);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.7);
  border-color: var(--line);
  color: var(--ink);
}
.btn-ghost:hover {
  border-color: rgba(15, 111, 92, 0.45);
  color: var(--brand);
  transform: translateY(-2px);
}

.btn-light {
  background: #fff;
  color: var(--brand-2);
  box-shadow: 0 16px 32px -18px rgba(0, 0, 0, 0.55);
}
.btn-light:hover {
  transform: translateY(-2px);
  background: #fffdf8;
  box-shadow: 0 22px 40px -18px rgba(0, 0, 0, 0.6);
}

.btn-lg { padding: 17px 38px; font-size: 16.5px; }

/* ---------- 4. 顶部导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(251, 249, 244, 0.82);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  backdrop-filter: saturate(180%) blur(16px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease), background-color 0.3s var(--ease);
}
.site-header.is-scrolled {
  border-bottom-color: var(--line);
  box-shadow: 0 12px 28px -26px rgba(22, 33, 29, 0.5);
  background: rgba(251, 249, 244, 0.95);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 74px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  flex: 0 0 auto;
}
.brand img {
  width: 40px;
  height: 40px;
  border-radius: 11px;
  box-shadow: 0 8px 18px -10px rgba(15, 111, 92, 0.55);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-name {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.06em;
}
.brand-sub {
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.nav-links { margin-left: auto; }
.nav-list {
  display: flex;
  align-items: center;
  gap: 30px;
}
.nav-list a {
  position: relative;
  padding: 6px 0;
  font-size: 14.5px;
  color: var(--ink-2);
  transition: color 0.2s var(--ease);
}
.nav-list a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1.5px;
  background: var(--brand);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.28s var(--ease);
}
.nav-list a:hover { color: var(--brand); }
.nav-list a:hover::after { transform: scaleX(1); }

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-left: 8px;
}
.nav-cta { padding: 11px 24px; font-size: 14px; }

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: #fff;
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}
.nav-toggle span {
  display: block;
  width: 17px;
  height: 1.6px;
  border-radius: 2px;
  background: var(--ink);
  transition: transform 0.25s var(--ease), opacity 0.2s var(--ease);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6.6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6.6px) rotate(-45deg); }

.nav-panel {
  padding: 8px 24px 22px;
  background: rgba(251, 249, 244, 0.98);
  border-bottom: 1px solid var(--line);
}
.nav-panel ul { display: grid; gap: 2px; }
.nav-panel ul a {
  display: block;
  padding: 12px 2px;
  font-size: 15px;
  color: var(--ink-2);
  border-bottom: 1px solid var(--line-soft);
}
.nav-panel ul a:hover { color: var(--brand); }
.nav-panel .btn { width: 100%; margin-top: 18px; }

/* ---------- 5. 首屏 ---------- */
.hero { padding: 78px 0 66px; }

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 66px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 26px;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--brand);
  text-transform: uppercase;
}
.eyebrow::before {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--brand);
}

.hero-copy h1 {
  font-family: var(--font-serif);
  font-size: clamp(46px, 5.4vw, 76px);
  font-weight: 700;
  line-height: 1.02;
  letter-spacing: 0.06em;
  margin-bottom: 26px;
}

.lede {
  max-width: 45ch;
  font-size: 16.5px;
  line-height: 1.95;
  color: var(--ink-2);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 34px 0 26px;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.hero-meta li {
  padding: 6px 15px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  font-size: 12.5px;
  color: var(--ink-3);
  letter-spacing: 0.03em;
}

.hero-card {
  position: relative;
  padding: 38px 34px 34px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}
.hero-glow {
  position: absolute;
  inset: -40% -30% auto -30%;
  height: 260px;
  background: radial-gradient(closest-side, rgba(15, 111, 92, 0.16), rgba(217, 102, 61, 0.08), transparent 78%);
  pointer-events: none;
}
.logo-plate {
  position: relative;
  display: grid;
  place-items: center;
  padding: 6px 0 20px;
}
.logo-plate img {
  width: 116px;
  height: 116px;
  border-radius: 26px;
  box-shadow: 0 24px 44px -22px rgba(15, 111, 92, 0.75);
}
.hero-card-title {
  text-align: center;
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 700;
  letter-spacing: 0.1em;
  line-height: 1.4;
}
.hero-card-sub {
  margin-top: 4px;
  text-align: center;
  font-size: 12.5px;
  color: var(--ink-3);
  letter-spacing: 0.08em;
}

.chip-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 26px;
}
.chip {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  padding: 12px 15px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  background: var(--paper);
  font-size: 12.5px;
  color: var(--ink-3);
}
.chip b {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
  color: var(--brand);
  letter-spacing: 0;
}

/* ---------- 6. 数据条 ---------- */
.stats {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.45);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}
.stat { padding: 26px 0 24px; }
.stat + .stat { padding-left: 34px; border-left: 1px dashed var(--line); }
.stat b {
  display: block;
  font-family: var(--font-mono);
  font-size: 32px;
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--ink);
}
.stat span {
  display: block;
  margin-top: 4px;
  font-size: 12.5px;
  color: var(--ink-3);
  letter-spacing: 0.05em;
}

/* ---------- 7. 区块通用 ---------- */
.section { padding: 94px 0; }
.section-alt {
  background: linear-gradient(180deg, rgba(231, 241, 236, 0.62) 0%, rgba(251, 249, 244, 0.35) 62%, rgba(251, 249, 244, 0) 100%);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

.sec-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 40px;
  margin-bottom: 46px;
}
.sec-index {
  display: block;
  margin-bottom: 16px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--accent);
}
.sec-title {
  font-family: var(--font-serif);
  font-size: clamp(27px, 3vw, 39px);
  font-weight: 700;
  line-height: 1.28;
  letter-spacing: 0.02em;
  margin-bottom: 16px;
}
.sec-desc {
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.9;
  color: var(--ink-2);
}
.sec-link {
  padding-bottom: 3px;
  border-bottom: 1px solid rgba(15, 111, 92, 0.35);
  font-size: 13.5px;
  color: var(--brand);
  white-space: nowrap;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.sec-link:hover { color: var(--accent); border-bottom-color: rgba(217, 102, 61, 0.5); }

/* ---------- 8. 功能卡片 ---------- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}
.feature {
  position: relative;
  padding: 30px 28px 32px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease), border-color 0.3s var(--ease);
}
.feature:hover {
  transform: translateY(-4px);
  border-color: rgba(15, 111, 92, 0.32);
  box-shadow: var(--shadow-md);
}
.feature-index {
  position: absolute;
  top: 22px;
  right: 24px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--ink-3);
  opacity: 0.8;
}
.feature-icon {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  margin-bottom: 22px;
  border-radius: 14px;
  background: var(--brand-soft);
  color: var(--brand);
}
.feature-icon svg { width: 23px; height: 23px; }
.feature h3 {
  margin-bottom: 10px;
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.feature p {
  font-size: 14px;
  line-height: 1.85;
  color: var(--ink-2);
}

/* ---------- 9. 频道表 ---------- */
.filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-bottom: 28px;
}
.filter-btn {
  padding: 9px 18px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  font-size: 13.5px;
  color: var(--ink-2);
  cursor: pointer;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease),
              border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.filter-btn:hover { border-color: rgba(15, 111, 92, 0.4); color: var(--brand); }
.filter-btn[aria-pressed="true"] {
  background: var(--brand);
  border-color: var(--brand);
  color: #fff;
  box-shadow: 0 10px 22px -14px rgba(10, 81, 67, 0.9);
}

.channel-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}
.channel {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 20px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  transition: border-color 0.2s var(--ease), transform 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.channel:hover {
  border-color: rgba(15, 111, 92, 0.35);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}
.channel[hidden] { display: none; }
.channel-num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--accent);
  padding: 3px 8px;
  border-radius: 6px;
  background: var(--accent-soft);
}
.channel-body { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.channel-name {
  font-size: 14.5px;
  font-weight: 600;
  letter-spacing: 0.01em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.channel-tag { font-size: 11.5px; color: var(--ink-3); letter-spacing: 0.03em; }

/* ---------- 10. 画面样张 ---------- */
.gallery {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}
.shot {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease), border-color 0.35s var(--ease);
}
.shot:hover {
  transform: translateY(-4px);
  border-color: rgba(15, 111, 92, 0.3);
  box-shadow: var(--shadow-md);
}
.shot-media {
  position: relative;
  aspect-ratio: 3 / 4;
  overflow: hidden;
  background: var(--paper-2);
}
.shot-media img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 18%;
  transition: transform 0.6s var(--ease);
}
.shot:hover .shot-media img { transform: scale(1.045); }
.shot-cap {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 18px 20px;
}
.shot-tag {
  align-self: flex-start;
  padding: 3px 9px;
  border-radius: 6px;
  background: var(--brand-soft);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  color: var(--brand);
}
.shot-cap h3 {
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.4;
}
.shot-cap p {
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--ink-3);
}

.shot-tile {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 16px;
  padding: 30px 24px;
  border-radius: var(--radius-md);
  background:
    radial-gradient(130% 120% at 84% -6%, rgba(23, 138, 114, 0.55), transparent 62%),
    linear-gradient(158deg, #0b5647 0%, #0a5143 58%, #083f34 100%);
  background-color: var(--brand-2);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.14);
}
.shot-tile img {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  box-shadow: 0 12px 26px -12px rgba(0, 0, 0, 0.6);
}
.shot-tile p {
  font-family: var(--font-serif);
  font-size: 16px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.9);
}
.shot-tile-link {
  align-self: flex-start;
  padding-bottom: 2px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.5);
  font-size: 13px;
  font-weight: 600;
  color: #fff;
}
.shot-tile-link:hover { border-color: #fff; opacity: 0.9; }

/* ---------- 11. 安装步骤 ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 30px;
}
.step {
  position: relative;
  padding-top: 26px;
  border-top: 2px solid rgba(15, 111, 92, 0.16);
}
.step::before {
  content: "";
  position: absolute;
  top: -2px;
  left: 0;
  width: 44px;
  height: 2px;
  background: var(--brand);
}
.step-index {
  display: block;
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--accent);
}
.step h3 {
  font-family: var(--font-serif);
  font-size: 21px;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: 0.03em;
}
.step p {
  font-size: 14px;
  line-height: 1.9;
  color: var(--ink-2);
}

/* ---------- 12. 适配设备 ---------- */
.device-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}
.device {
  padding: 26px 24px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  transition: border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}
.device:hover { border-color: rgba(15, 111, 92, 0.3); box-shadow: var(--shadow-sm); }
.device h3 {
  margin-bottom: 14px;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.04em;
}
.spec-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 9px 0;
  border-bottom: 1px dashed var(--line-soft);
  font-size: 12.5px;
}
.spec-row:last-child { border-bottom: 0; padding-bottom: 0; }
.spec-row span { color: var(--ink-3); }
.spec-row b { font-weight: 600; color: var(--ink); font-size: 12.5px; text-align: right; }

/* ---------- 13. 常见问题 ---------- */
.faq {
  display: grid;
  gap: 12px;
  max-width: 940px;
}
.faq details {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 0 26px;
  transition: border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}
.faq details[open] {
  border-color: rgba(15, 111, 92, 0.32);
  box-shadow: var(--shadow-sm);
}
.faq summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 21px 0;
  cursor: pointer;
  list-style: none;
  font-size: 15.5px;
  font-weight: 600;
  letter-spacing: 0.01em;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::marker { content: ""; }
.plus {
  position: relative;
  flex: 0 0 auto;
  width: 22px;
  height: 22px;
  border: 1px solid var(--line);
  border-radius: 50%;
  transition: transform 0.3s var(--ease), border-color 0.25s var(--ease), background-color 0.25s var(--ease);
}
.plus::before,
.plus::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 10px;
  height: 1.5px;
  margin: -0.75px 0 0 -5px;
  background: var(--brand);
  border-radius: 2px;
  transition: transform 0.3s var(--ease);
}
.plus::after { transform: rotate(90deg); }
details[open] .plus { background: var(--brand-soft); border-color: rgba(15, 111, 92, 0.4); }
details[open] .plus::after { transform: rotate(0deg); }
.faq-body {
  padding: 18px 0 24px;
  border-top: 1px solid var(--line-soft);
  font-size: 14px;
  line-height: 1.95;
  color: var(--ink-2);
}

/* ---------- 14. 留言 ---------- */
.comment-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}
.comment {
  padding: 26px 28px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  transition: border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}
.comment:hover { border-color: rgba(15, 111, 92, 0.28); box-shadow: var(--shadow-sm); }
.comment-head {
  display: flex;
  align-items: center;
  gap: 13px;
  margin-bottom: 15px;
}
.avatar {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--brand-soft);
  color: var(--brand-2);
  font-family: var(--font-serif);
  font-size: 15px;
  font-weight: 700;
  flex: 0 0 auto;
}
.comment-name { font-size: 14.5px; font-weight: 600; line-height: 1.5; }
.comment-meta { font-size: 11.5px; color: var(--ink-3); line-height: 1.5; }
.comment > p { font-size: 14px; line-height: 1.9; color: var(--ink-2); }
.comment-foot {
  display: flex;
  gap: 20px;
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px dashed var(--line-soft);
  font-size: 12px;
  color: var(--ink-3);
}

/* ---------- 15. 下载区 ---------- */
.cta-wrap { padding: 0 0 96px; }
.cta {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) auto;
  align-items: center;
  gap: 48px;
  padding: 58px 58px 56px;
  border-radius: 30px;
  background:
    radial-gradient(760px 340px at 12% -20%, rgba(23, 138, 114, 0.55), transparent 70%),
    linear-gradient(140deg, #0c5c4c 0%, #093f34 100%);
  box-shadow: 0 44px 90px -54px rgba(9, 63, 52, 0.85);
  color: #fff;
}
.cta-copy h2 {
  font-family: var(--font-serif);
  font-size: clamp(26px, 3vw, 38px);
  font-weight: 700;
  line-height: 1.32;
  letter-spacing: 0.03em;
  margin-bottom: 14px;
  color: #fff;
}
.cta-copy p {
  max-width: 52ch;
  font-size: 14px;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.72);
}
.cta-action { display: flex; flex-direction: column; align-items: flex-start; gap: 14px; }
.cta-note {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.6);
}

/* ---------- 16. 页脚 ---------- */
.footer {
  padding: 56px 0 42px;
  border-top: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.4);
}
.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) repeat(2, minmax(0, 0.75fr));
  gap: 44px;
}
.footer-brand p {
  max-width: 34ch;
  margin-top: 18px;
  font-size: 13px;
  line-height: 1.9;
  color: var(--ink-3);
}
.footer-col h3 {
  margin-bottom: 14px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.footer-col ul { display: grid; gap: 9px; }
.footer-col a {
  font-size: 13.5px;
  color: var(--ink-2);
  transition: color 0.2s var(--ease);
}
.footer-col a:hover { color: var(--brand); }

.copy {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 44px;
  padding-top: 22px;
  border-top: 1px solid var(--line-soft);
  font-size: 12px;
  color: var(--ink-3);
  letter-spacing: 0.03em;
}

/* ---------- 17. 响应式 ---------- */
@media (max-width: 1080px) {
  .hero-grid { grid-template-columns: minmax(0, 1fr); gap: 46px; }
  .hero-card { max-width: 460px; }
  .feature-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .channel-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .gallery { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .device-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .cta { grid-template-columns: minmax(0, 1fr); gap: 30px; padding: 46px 40px; }
  .footer-grid { grid-template-columns: minmax(0, 1fr) repeat(2, minmax(0, 0.6fr)); gap: 32px; }
}

@media (max-width: 880px) {
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
  .nav-cta { display: none; }
  .nav { height: 66px; }
  .steps { grid-template-columns: minmax(0, 1fr); gap: 26px; }
  .comment-grid { grid-template-columns: minmax(0, 1fr); }
  .sec-head { grid-template-columns: minmax(0, 1fr); align-items: start; gap: 18px; }
  .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 dashed var(--line); }
  .stats-grid .stat:nth-child(n + 3) { border-top: 1px dashed var(--line); }
  .section { padding: 68px 0; }
  .hero { padding: 54px 0 48px; }
}

@media (max-width: 620px) {
  .container { width: min(1160px, 100% - 32px); }
  .brand-sub { display: none; }
  .hero-copy h1 { letter-spacing: 0.05em; }
  .lede { font-size: 15.5px; }
  .hero-actions .btn { width: 100%; }
  .feature-grid { grid-template-columns: minmax(0, 1fr); }
  .channel-grid { grid-template-columns: minmax(0, 1fr); }
  .gallery { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .shot-cap { padding: 13px 14px 16px; }
  .shot-cap p { display: none; }
  .device-grid { grid-template-columns: minmax(0, 1fr); }
  .cta { padding: 34px 24px 32px; border-radius: 22px; }
  .cta-action { width: 100%; }
  .cta-action .btn { width: 100%; }
  .footer-grid { grid-template-columns: minmax(0, 1fr); gap: 30px; }
  .hero-card { padding: 30px 22px 26px; }
  .chip-grid { grid-template-columns: 1fr 1fr; gap: 8px; }
  .chip { padding: 10px 12px; font-size: 11.5px; }
  .chip b { font-size: 13.5px; }
}

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