/* ===========================================================
   Kazumi · 单页站点样式
   主题：樱花白（浅粉白底 + 樱粉 + 抹茶绿点缀）
   =========================================================== */

/* ---------- 1. 变量 ---------- */
:root {
  --bg: #fffafb;
  --bg-sakura: #fff3f6;
  --surface: #ffffff;
  --ink: #2a222c;
  --ink-2: #544b58;
  --muted: #857a8c;
  --faint: #afa3b6;
  --line: #f3e4ec;
  --line-soft: #faf0f4;

  --pink: #e45c86;
  --pink-deep: #c63e68;
  --pink-soft: #ffeaf1;
  --plum: #6d2145;
  --matcha: #7fb069;
  --matcha-soft: #eef6e9;

  --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-sm: 10px;
  --r-md: 16px;
  --r-lg: 22px;
  --r-pill: 999px;

  --sh-s: 0 2px 10px rgba(74, 40, 56, 0.05);
  --sh-m: 0 18px 36px -24px rgba(120, 50, 80, 0.35);
  --sh-l: 0 40px 70px -40px rgba(110, 40, 70, 0.4);
  --ease: cubic-bezier(0.24, 0.62, 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, figcaption { margin: 0; }
ul, ol { list-style: none; padding: 0; }
button { font: inherit; color: inherit; }

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

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

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 99;
  padding: 10px 18px;
  border-radius: 0 0 12px 0;
  background: var(--pink-deep);
  color: #fff;
  font-size: 13px;
}
.skip-link:focus { left: 0; }

/* ---------- 3. 容器与按钮 ---------- */
.container { width: min(1140px, 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: 12px;
  font-size: 14.5px;
  font-weight: 700;
  letter-spacing: 0.01em;
  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(--pink-deep);
  border-color: var(--pink-deep);
  color: #fff;
  box-shadow: 0 6px 16px -8px rgba(198, 62, 104, 0.7);
}
.btn-primary:hover {
  background: #ad3459;
  border-color: #ad3459;
  transform: translateY(-1px);
  box-shadow: 0 10px 22px -10px rgba(173, 52, 89, 0.75);
}

.btn-line {
  background: #fff;
  border-color: var(--line);
  color: var(--ink);
  box-shadow: var(--sh-s);
}
.btn-line:hover {
  border-color: var(--pink);
  color: var(--pink-deep);
  transform: translateY(-1px);
}

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

/* ---------- 4. 头部 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(255, 250, 251, 0.9);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.site-header.is-scrolled {
  border-bottom-color: var(--line);
  box-shadow: 0 14px 30px -28px rgba(90, 40, 60, 0.5);
}

.nav {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 72px;
}

.brand { display: inline-flex; align-items: center; gap: 10px; flex: 0 0 auto; }
.brand img {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--pink-soft);
  padding: 2px;
}
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-name { font-size: 20px; font-weight: 800; letter-spacing: 0.02em; color: var(--ink); }
.brand-sub {
  font-family: var(--mono);
  font-size: 8.5px;
  letter-spacing: 0.18em;
  color: var(--faint);
}

.nav-links { margin-left: auto; }
.nav-list { display: flex; align-items: center; gap: 24px; }
.nav-list a {
  position: relative;
  display: block;
  padding: 6px 0;
  font-size: 13.5px;
  color: var(--ink-2);
  transition: color 0.2s var(--ease);
}
.nav-list a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -2px;
  width: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--pink);
  transform: translateX(-50%);
  transition: width 0.25s var(--ease);
}
.nav-list a:hover { color: var(--pink-deep); }
.nav-list a:hover::after { width: 100%; }

.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 var(--line);
  border-radius: 12px;
  background: #fff;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  width: 16px;
  height: 2px;
  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(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: 6px 24px 22px;
  background: #fffafb;
  border-top: 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(--pink-deep); }
.nav-panel .btn { width: 100%; margin-top: 18px; }

/* ---------- 5. 首屏 ---------- */
.hero {
  position: relative;
  overflow: hidden;
  padding: 62px 0 66px;
  background:
    radial-gradient(60% 70% at 92% 4%, rgba(228, 92, 134, 0.12), transparent 62%),
    radial-gradient(50% 60% at 6% 96%, rgba(127, 176, 105, 0.1), transparent 66%),
    var(--bg);
}

.orb {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  filter: blur(1px);
}
.orb-a {
  width: 220px;
  height: 220px;
  right: -70px;
  top: 30px;
  background: radial-gradient(circle, rgba(228, 92, 134, 0.16), transparent 68%);
}
.orb-b {
  width: 180px;
  height: 180px;
  left: -60px;
  bottom: 10px;
  background: radial-gradient(circle, rgba(127, 176, 105, 0.14), transparent 70%);
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: 52px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 20px;
  padding: 5px 14px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  background: #fff;
  font-size: 12px;
  font-weight: 700;
  color: var(--pink-deep);
  box-shadow: var(--sh-s);
}
.eyebrow::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--matcha);
}

.hero-copy h1 {
  display: block;
  font-size: clamp(48px, 6vw, 82px);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.015em;
  color: var(--ink);
}
.hl {
  background-image: linear-gradient(transparent 64%, rgba(228, 92, 134, 0.28) 64%, rgba(228, 92, 134, 0.28) 94%, transparent 94%);
  -webkit-box-decoration-break: clone;
  box-decoration-break: clone;
}
.hero-copy h1 + .lede { margin-top: 22px; }

.lede {
  max-width: 45ch;
  font-size: 16px;
  line-height: 1.95;
  color: var(--ink-2);
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 30px 0 22px; }

.hero-meta { display: flex; flex-wrap: wrap; gap: 8px; }
.hero-meta li {
  padding: 5px 13px;
  border-radius: var(--r-pill);
  background: var(--pink-soft);
  font-size: 12px;
  font-weight: 600;
  color: var(--pink-deep);
}

/* 首屏番剧卡 */
.hero-visual { position: relative; display: flex; justify-content: center; }

.hero-card {
  position: relative;
  width: 288px;
  overflow: hidden;
  border-radius: 24px;
  background: #2a222c;
  box-shadow: var(--sh-l), 0 0 0 1px rgba(255, 255, 255, 0.4);
}
.hero-card img {
  width: 100%;
  height: auto;
  aspect-ratio: 9 / 16;
  object-fit: cover;
  object-position: center 22%;
}
.hero-card figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 44px 18px 16px;
  background: linear-gradient(transparent, rgba(24, 12, 20, 0.82) 62%);
  color: #fff;
}
.hero-card figcaption b { display: block; font-size: 15px; font-weight: 800; }
.hero-card figcaption span {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.04em;
  color: rgba(255, 255, 255, 0.72);
}

.float-chip {
  position: absolute;
  z-index: 3;
  padding: 8px 14px;
  border-radius: 12px;
  background: #fff;
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-2);
  white-space: nowrap;
  box-shadow: 0 16px 30px -18px rgba(90, 40, 60, 0.55);
}
.float-chip b { color: var(--pink-deep); }
.chip-a { top: 34px; left: calc(50% + 152px); }
.chip-b { bottom: 74px; right: calc(50% + 152px); left: auto; }

/* ---------- 6. 数据条 ---------- */
.stats {
  background: var(--bg-sakura);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.stats-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); }
.stat { padding: 22px 0 20px; }
.stat + .stat { padding-left: 32px; border-left: 1px dotted #f0cfda; }
.stat b {
  display: block;
  font-size: 32px;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--pink-deep);
}
.stat span { display: block; margin-top: 2px; font-size: 12px; color: var(--muted); }

/* ---------- 7. 区块 ---------- */
.section { padding: 84px 0; }
.section-sakura {
  background: var(--bg-sakura);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.sec-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 36px;
  margin-bottom: 36px;
}
.sec-index {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  padding: 4px 11px;
  border-radius: 7px;
  background: var(--pink-soft);
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  color: var(--pink-deep);
}
.sec-title {
  font-size: clamp(26px, 3vw, 38px);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.005em;
  margin-bottom: 12px;
}
.sec-desc { max-width: 62ch; font-size: 14.5px; line-height: 1.9; color: var(--muted); }

.sec-link {
  padding-bottom: 3px;
  border-bottom: 2px solid rgba(228, 92, 134, 0.3);
  font-size: 12.5px;
  font-weight: 700;
  color: var(--pink-deep);
  white-space: nowrap;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.sec-link:hover { color: var(--pink); border-bottom-color: var(--pink); }

/* ---------- 8. 在看的 ---------- */
.shelf-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}
.shelf-card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--surface);
  box-shadow: var(--sh-s);
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
}
.shelf-card:hover { transform: translateY(-4px); box-shadow: var(--sh-m); }
.shelf-art { position: relative; background: #2a222c; }
.shelf-art img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  object-position: center 30%;
}
.shelf-badge {
  position: absolute;
  top: 10px;
  right: 10px;
  padding: 3px 9px;
  border-radius: 6px;
  background: var(--pink-deep);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: #fff;
}
.shelf-info { padding: 16px 18px 18px; }
.shelf-info h3 { font-size: 15.5px; font-weight: 800; }
.shelf-info p { margin-top: 3px; font-size: 11.5px; color: var(--muted); }
.shelf-progress {
  height: 4px;
  margin: 12px 0 6px;
  border-radius: 2px;
  background: var(--line-soft);
  overflow: hidden;
}
.shelf-progress i {
  display: block;
  height: 100%;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--pink), var(--pink-deep));
}
.shelf-note { font-family: var(--mono); font-size: 10.5px; color: var(--faint); }

.shelf-more {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 26px 24px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background:
    radial-gradient(70% 60% at 90% 8%, rgba(228, 92, 134, 0.1), transparent 62%),
    #fff;
}
.shelf-more-kicker {
  margin-bottom: 10px;
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.18em;
  color: var(--faint);
}
.shelf-more b { font-size: 20px; font-weight: 800; letter-spacing: -0.01em; }
.shelf-more p { margin: 8px 0 14px; font-size: 12.5px; line-height: 1.85; color: var(--muted); }
.rule-mini {
  margin-bottom: 16px;
  border-top: 1px dotted #f0cfda;
}
.rule-mini li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  padding: 7px 0;
  border-bottom: 1px dotted #f0cfda;
  font-size: 11.5px;
  color: var(--muted);
}
.rule-mini b { font-size: 11px; font-weight: 700; color: var(--matcha); }
.shelf-more-link {
  align-self: flex-start;
  font-size: 12.5px;
  font-weight: 700;
  color: var(--pink-deep);
}
.shelf-more-link span { display: inline-block; margin-left: 4px; }

/* ---------- 9. 功能卡 ---------- */
.feature-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }

.feature {
  position: relative;
  padding: 26px 24px 28px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--surface);
  box-shadow: var(--sh-s);
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), border-color 0.25s var(--ease);
}
.feature:hover {
  transform: translateY(-4px);
  border-color: #f2c9d8;
  box-shadow: var(--sh-m);
}
.feature-num {
  position: absolute;
  top: 22px;
  right: 22px;
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--pink-soft);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 700;
  color: var(--pink-deep);
}
.feature-icon {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  margin-bottom: 18px;
  border-radius: 14px;
  background: var(--pink-soft);
  color: var(--pink-deep);
}
.feature-icon svg { width: 22px; height: 22px; }
.feature h3 { margin-bottom: 8px; font-size: 16.5px; font-weight: 800; }
.feature p { font-size: 13px; line-height: 1.9; color: var(--muted); }

/* ---------- 10. 三步 ---------- */
.steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.step {
  position: relative;
  padding: 30px 24px 26px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--surface);
}
.step-no {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  margin-bottom: 14px;
  border-radius: 50%;
  background: var(--ink);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
  color: #ffe9f0;
}
.step h3 { margin-bottom: 9px; font-size: 17px; font-weight: 800; }
.step p { font-size: 13px; line-height: 1.9; color: var(--muted); }

/* ---------- 11. 平台 ---------- */
.platform-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }
.platform {
  padding: 24px 22px 20px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--surface);
  transition: border-color 0.2s var(--ease), box-shadow 0.25s var(--ease);
}
.platform:hover { border-color: #f2c9d8; box-shadow: var(--sh-m); }
.platform h3 { font-size: 16px; font-weight: 800; }
.platform p { margin: 5px 0 12px; font-size: 11.5px; line-height: 1.8; color: var(--muted); }
.spec-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  padding: 7px 0;
  border-top: 1px dotted #f0cfda;
  font-size: 11.5px;
}
.spec-row span { color: var(--faint); }
.spec-row b { font-weight: 700; color: var(--ink); text-align: right; }

/* ---------- 12. 弹幕墙 ---------- */
.danmaku-wall {
  position: relative;
  padding: 44px 34px 30px;
  border-radius: 26px;
  background:
    radial-gradient(70% 90% at 92% 0%, rgba(228, 92, 134, 0.32), transparent 60%),
    radial-gradient(60% 80% at 4% 100%, rgba(127, 176, 105, 0.16), transparent 62%),
    linear-gradient(155deg, #241a26 0%, #150f18 100%);
  box-shadow: var(--sh-l);
  overflow: hidden;
}
.danmaku-tag {
  display: inline-block;
  margin-bottom: 22px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: rgba(255, 233, 240, 0.55);
}
.danmaku-list { display: block; }
.danmaku-list li {
  width: fit-content;
  max-width: 100%;
  margin-bottom: 10px;
  padding: 7px 15px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--r-pill);
  background: rgba(255, 255, 255, 0.06);
  font-size: 13px;
  color: #ffe9f0;
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
}
.danmaku-list li:nth-child(odd) { background: rgba(228, 92, 134, 0.16); border-color: rgba(228, 92, 134, 0.28); }
.danmaku-note {
  margin-top: 18px;
  font-size: 11.5px;
  color: rgba(255, 233, 240, 0.5);
}

/* ---------- 13. 问答 ---------- */
.faq { display: grid; gap: 10px; max-width: 940px; }
.faq details {
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--surface);
  overflow: hidden;
  transition: border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}
.faq details[open] { border-color: #f2c9d8; background: #fffafb; }
.faq summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 18px 22px;
  font-size: 14.5px;
  font-weight: 700;
  cursor: pointer;
  list-style: none;
}
.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: background-color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.plus::before,
.plus::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 9px;
  height: 1.5px;
  margin: -0.75px 0 0 -4.5px;
  border-radius: 1px;
  background: var(--pink-deep);
  transition: transform 0.3s var(--ease), background-color 0.2s var(--ease);
}
.plus::after { transform: rotate(90deg); }
details[open] .plus { background: var(--pink-deep); border-color: var(--pink-deep); }
details[open] .plus::before,
details[open] .plus::after { background: #fff; }
details[open] .plus::after { transform: rotate(0deg); }
.faq-body {
  padding: 0 22px 20px;
  font-size: 13px;
  line-height: 1.95;
  color: var(--muted);
}

/* ---------- 14. 留言 ---------- */
.comment-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.comment {
  padding: 24px 24px 22px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--surface);
  box-shadow: var(--sh-s);
  transition: transform 0.2s var(--ease), box-shadow 0.25s var(--ease);
}
.comment:hover { transform: translateY(-3px); box-shadow: var(--sh-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(--pink-soft);
  color: var(--pink-deep);
  font-size: 14px;
  font-weight: 800;
}
.comment-name { font-size: 13.5px; font-weight: 700; line-height: 1.5; }
.comment-meta {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--faint);
  line-height: 1.6;
}
.comment > p { font-size: 13px; line-height: 1.95; color: var(--muted); }
.comment-foot {
  display: flex;
  gap: 16px;
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px dotted #f0cfda;
  font-size: 11px;
  color: var(--faint);
}

/* ---------- 15. 下载区 ---------- */
.cta-wrap { padding: 0 0 84px; }
.cta {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) auto;
  align-items: center;
  gap: 44px;
  padding: 48px 48px 46px;
  border-radius: 26px;
  background:
    radial-gradient(80% 120% at 88% 4%, rgba(255, 233, 240, 0.22), transparent 58%),
    linear-gradient(150deg, #c63e68 0%, #7a2145 100%);
  color: #fff5f8;
  box-shadow: var(--sh-l);
}
.cta-kicker {
  display: inline-block;
  margin-bottom: 12px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: rgba(255, 233, 240, 0.72);
}
.cta-copy h2 {
  font-size: clamp(25px, 3vw, 36px);
  font-weight: 800;
  line-height: 1.34;
  letter-spacing: -0.005em;
  margin-bottom: 10px;
  color: #fff;
}
.cta-copy p { max-width: 44ch; font-size: 13.5px; line-height: 1.9; color: rgba(255, 240, 245, 0.78); }
.cta-action { display: flex; flex-direction: column; align-items: flex-start; gap: 12px; }
.cta .btn-primary {
  background: #fff;
  border-color: #fff;
  color: var(--pink-deep);
  box-shadow: 0 8px 20px -10px rgba(60, 10, 30, 0.6);
}
.cta .btn-primary:hover { background: #ffeaf1; border-color: #ffeaf1; }
.cta-note {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.04em;
  color: rgba(255, 240, 245, 0.66);
}

/* ---------- 16. 页脚 ---------- */
.footer { padding: 52px 0 36px; background: var(--bg-sakura); border-top: 1px solid var(--line); }
.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) repeat(2, minmax(0, 0.7fr));
  gap: 38px;
}
.footer-brand .brand img { background: #fff; }
.footer-brand p {
  max-width: 36ch;
  margin-top: 14px;
  font-size: 12px;
  line-height: 1.95;
  color: var(--muted);
}
.footer-col h3 {
  margin-bottom: 12px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  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(--pink-deep); }

.copy {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: 38px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  font-size: 11px;
  color: var(--faint);
}

/* ---------- 17. 响应式 ---------- */
@media (max-width: 1080px) {
  .hero-grid { grid-template-columns: minmax(0, 1fr); gap: 50px; }
  .hero-visual { justify-content: center; }
  .hero-card { width: 268px; }
  .feature-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .platform-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .cta { grid-template-columns: minmax(0, 1fr); gap: 24px; padding: 40px 34px; }
  .danmaku-wall { padding: 38px 26px 26px; }
}

@media (max-width: 880px) {
  .nav-links { display: none; }
  .nav-cta { display: none; }
  .nav-toggle { display: flex; }
  .nav { height: 64px; }
  .nav-actions { margin-left: auto; }
  .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 dotted #f0cfda; }
  .stats-grid .stat:nth-child(n + 3) { border-top: 1px dotted #f0cfda; }
  .section { padding: 60px 0; }
  .hero { padding: 46px 0 54px; }
  .sec-head { grid-template-columns: minmax(0, 1fr); align-items: start; gap: 14px; }
  .shelf-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
  .shelf-more { grid-column: 1 / -1; }
  .steps { grid-template-columns: minmax(0, 1fr); gap: 12px; }
  .comment-grid { grid-template-columns: minmax(0, 1fr); }
  .danmaku-list li { margin-left: 0 !important; }
}

@media (max-width: 640px) {
  .container { width: min(1140px, 100% - 32px); }
  .brand-sub { display: none; }
  .hero-copy h1 { font-size: 52px; }
  .lede { font-size: 14.5px; }
  .hero-actions .btn { width: 100%; }
  .hero-visual { justify-content: center; }
  .hero-card { width: 238px; }
  .float-chip { font-size: 11px; padding: 6px 11px; }
  .chip-a { top: 16px; left: calc(50% + 127px); }
  .chip-b { bottom: 34px; right: calc(50% + 127px); left: auto; }
  .feature-grid { grid-template-columns: minmax(0, 1fr); }
  .shelf-grid { grid-template-columns: minmax(0, 1fr); }
  .platform-grid { grid-template-columns: minmax(0, 1fr); }
  .danmaku-wall { padding: 30px 18px 24px; border-radius: 20px; }
  .danmaku-list li { font-size: 12px; padding: 6px 12px; }
  .faq summary { padding: 15px 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: 24px; }
}

@media (max-width: 420px) {
  .float-chip { display: none; }
}

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