:root {
  --sky: #4eb0e2;
  --sky-deep: #2a8fc4;
  --red: #e8392f;
  --red-deep: #c42820;
  --box: #d4b48a;
  --box-soft: #f0e2cc;
  --paper: #f6f3ef;
  --ink: #1a1612;
  --mute: #6a5f56;
  --panel: #ffffff;
  --line: rgba(26, 22, 18, 0.1);
  --foot: #231c17;
  --font: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --display: "ZCOOL XiaoWei", "Noto Serif SC", serif;
  --header: 72px;
  --gap: clamp(32px, 6vw, 96px);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: var(--header); }
body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--font);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
button { font: inherit; border: 0; background: none; cursor: pointer; color: inherit; }
img { display: block; max-width: 100%; height: auto; }
ul, ol, p, h1, h2, h3, figure { margin: 0; padding: 0; }
ul, ol { list-style: none; }
:focus-visible { outline: 3px solid var(--sky); outline-offset: 3px; }

.shell { width: min(1160px, calc(100% - var(--gap))); margin-inline: auto; }

/* mast */
.mast {
  position: fixed; inset: 0 0 auto; z-index: 70;
  height: var(--header);
  display: flex; align-items: center;
  background: rgba(246, 243, 239, 0.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}
.mast-inner {
  width: min(1160px, calc(100% - var(--gap)));
  margin-inline: auto;
  display: flex; align-items: center; gap: 18px;
}
.brand { display: inline-flex; align-items: center; gap: 10px; }
.brand img {
  width: 42px; height: 42px; border-radius: 14px;
  box-shadow: 0 2px 6px rgba(26, 22, 18, 0.12);
}
.brand strong { display: block; font-size: 17px; font-weight: 900; }
.brand small { display: block; margin-top: 2px; font-size: 11px; color: var(--mute); letter-spacing: .08em; }
.nav { margin-left: auto; display: flex; gap: 16px; font-size: 13px; font-weight: 700; color: var(--mute); }
.nav a:hover { color: var(--red); }
.mast-cta {
  padding: 10px 16px; border-radius: 999px;
  background: var(--red); color: #fff; font-size: 13px; font-weight: 800;
  box-shadow: 0 2px 6px rgba(232, 57, 47, .35);
}
.menu {
  display: none; width: 42px; height: 42px;
  border: 1px solid var(--line); border-radius: 12px; font-size: 20px;
}

/* ========== HERO: 控制台（文案+下载在上/左，终端在下/右） ========== */
.hero {
  position: relative;
  padding: calc(var(--header) + 28px) 0 0;
  overflow: hidden;
  background:
    radial-gradient(ellipse at 85% 10%, rgba(78, 176, 226, .22), transparent 42%),
    radial-gradient(ellipse at 5% 40%, rgba(232, 57, 47, .08), transparent 40%),
    linear-gradient(180deg, #efe9e1 0%, var(--paper) 55%);
}
.hero-mesh {
  position: absolute; inset: 0; pointer-events: none; opacity: .35;
  background-image:
    linear-gradient(rgba(26,22,18,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(26,22,18,.05) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: linear-gradient(#000, transparent 85%);
}
.hero-grid {
  position: relative;
  width: min(1160px, calc(100% - var(--gap)));
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  grid-template-areas:
    "copy console"
    "cta console";
  gap: 18px 28px;
  align-items: start;
  padding-bottom: 48px;
}
.hero-copy { grid-area: copy; }
.hero-cta { grid-area: cta; align-self: start; }
.console { grid-area: console; }
.hero-copy .kicker {
  display: inline-flex; align-items: center; gap: 8px;
  margin-bottom: 16px; padding: 6px 12px; border-radius: 999px;
  background: rgba(78,176,226,.18); color: var(--sky-deep);
  font-size: 12px; font-weight: 800; letter-spacing: .1em;
}
.hero-copy .kicker i {
  width: 8px; height: 8px; border-radius: 50%; background: var(--red);
  box-shadow: 0 0 0 4px rgba(232,57,47,.18); animation: blink 1.6s ease infinite;
}
@keyframes blink { 50% { opacity: .35; } }
.hero-copy h1 {
  font-family: var(--display);
  font-size: clamp(44px, 7vw, 76px);
  font-weight: 400; line-height: 1.05; letter-spacing: .02em;
}
.hero-copy .lead {
  margin-top: 12px; font-size: clamp(17px, 2vw, 22px);
  font-weight: 800; color: var(--red);
}
.hero-copy .desc {
  margin-top: 14px; max-width: 34em; color: var(--mute); font-size: 15px; line-height: 1.85;
}
.hero-pills {
  display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px;
}
.hero-pills span {
  padding: 7px 12px; border-radius: 999px; background: var(--panel);
  border: 1px solid var(--line); font-size: 12px; font-weight: 800; color: var(--mute);
}
.hero-pills span em { color: var(--sky-deep); font-style: normal; }
.hero-cta { margin-top: 4px; }
.btn-dl {
  display: inline-flex; align-items: center; gap: 10px;
  min-height: 56px; padding: 0 26px; border-radius: 16px;
  background: linear-gradient(135deg, var(--red), var(--red-deep));
  color: #fff; font-size: 16px; font-weight: 800;
  box-shadow: 0 2px 8px rgba(232,57,47,.38);
}
.btn-dl i { font-size: 22px; }
.btn-dl small { display: block; margin-top: 2px; font-size: 11px; font-weight: 600; opacity: .88; }

/* terminal console */
.console {
  border-radius: 28px;
  background: #1f1a16;
  color: #f4ebe3;
  border: 1px solid rgba(255,255,255,.08);
  box-shadow: 0 28px 60px rgba(26,22,18,.28);
  overflow: hidden;
}
.console-bar {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 16px; background: #2a231e;
  border-bottom: 1px solid rgba(255,255,255,.06);
  font-size: 12px; font-weight: 700; color: #b8a99a;
}
.console-bar .dots { display: flex; gap: 6px; }
.console-bar .dots i { width: 9px; height: 9px; border-radius: 50%; background: #5a4e44; }
.console-bar .dots i:nth-child(1) { background: #e8392f; }
.console-bar .dots i:nth-child(2) { background: #e8b84e; }
.console-bar .dots i:nth-child(3) { background: #4eb0e2; }
.console-body {
  display: grid; grid-template-columns: 1fr 1.05fr; gap: 14px; padding: 16px;
}
.console-side { display: grid; gap: 10px; align-content: start; }
.stat {
  padding: 12px 14px; border-radius: 16px;
  background: rgba(255,255,255,.04); border: 1px solid rgba(255,255,255,.06);
}
.stat b { display: block; font-size: 11px; letter-spacing: .08em; color: #8f8174; margin-bottom: 4px; }
.stat strong { display: block; font-size: 18px; font-weight: 900; }
.stat span { display: block; margin-top: 4px; font-size: 12px; color: #a89888; }
.stat.sky strong { color: #7fd0f0; }
.stat.red strong { color: #ff8a7e; }
.search-mock {
  padding: 12px 14px; border-radius: 14px;
  background: rgba(78,176,226,.12); border: 1px dashed rgba(78,176,226,.35);
  font-size: 12px; color: #9ecfe6; display: flex; align-items: center; gap: 8px;
}
.phone-dock {
  position: relative; display: grid; place-items: center; padding: 8px 0 4px;
}
.phone {
  width: min(220px, 100%); padding: 10px; border-radius: 30px;
  background: #0e0c0a;
  box-shadow: 0 0 0 1px rgba(255,255,255,.08), 0 18px 36px rgba(0,0,0,.35);
}
.phone .notch {
  width: 34%; height: 8px; margin: 0 auto 8px; border-radius: 999px; background: #2a231e;
}
.phone img { width: 100%; height: auto; border-radius: 20px; }
.chip-float {
  position: absolute; padding: 7px 11px; border-radius: 999px;
  background: #fff; color: var(--ink); font-size: 11px; font-weight: 800;
  box-shadow: 0 8px 18px rgba(0,0,0,.25);
}
.chip-float.c1 { top: 8%; left: -4%; color: var(--sky-deep); }
.chip-float.c2 { bottom: 14%; right: -6%; color: var(--red); }

/* strip */
.strip {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px 16px;
  width: min(1160px, calc(100% - var(--gap))); margin: 0 auto;
  padding: 18px 0; border-block: 1px solid var(--line);
  background: var(--panel);
  position: relative;
}
.strip::before, .strip::after {
  content: ""; position: absolute; left: calc(50% - 50vw); right: calc(50% - 50vw);
  top: 0; bottom: 0; background: var(--panel); z-index: -1;
  border-block: 1px solid var(--line);
}
.strip span { flex: 1 1 auto; text-align: center; font-size: 13px; font-weight: 800; color: var(--mute); white-space: nowrap; }
.strip span b { color: var(--red); }

/* channels tabs */
.channels { padding: 80px 0; }
.sec-head { margin-bottom: 26px; }
.sec-head .label { display: block; margin-bottom: 8px; color: var(--sky-deep); font-size: 12px; font-weight: 800; letter-spacing: .14em; }
.sec-head h2 {
  font-family: var(--display); font-size: clamp(28px, 4vw, 42px);
  font-weight: 400; letter-spacing: .02em; line-height: 1.2; max-width: 14em;
}
.sec-head p { margin-top: 10px; max-width: 40em; color: var(--mute); font-size: 15px; }
.tab-row {
  display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px;
}
.tab-row button {
  padding: 10px 16px; border-radius: 999px; border: 1px solid var(--line);
  background: var(--panel); font-size: 13px; font-weight: 800; color: var(--mute);
}
.tab-row button.is-on {
  background: var(--ink); color: #fff; border-color: var(--ink);
}
.channel-panels { display: grid; gap: 14px; }
.channel-panel { display: none; }
.channel-panel.is-on { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.mini-card {
  padding: 20px; border-radius: 20px; background: var(--panel);
  border: 1px solid var(--line); box-shadow: 0 12px 28px rgba(26,22,18,.05);
  min-height: 150px; display: flex; flex-direction: column;
}
.mini-card i {
  width: 42px; height: 42px; border-radius: 14px; display: grid; place-items: center;
  background: rgba(78,176,226,.14); color: var(--sky-deep); font-size: 20px; margin-bottom: 14px;
}
.mini-card:nth-child(2) i { background: rgba(232,57,47,.12); color: var(--red); }
.mini-card:nth-child(3) i { background: rgba(212,180,138,.25); color: #9a6f3c; }
.mini-card h3 { font-size: 17px; font-weight: 900; margin-bottom: 6px; }
.mini-card p { font-size: 13px; color: var(--mute); flex: 1; }
.mini-card .tag { margin-top: 12px; font-size: 11px; font-weight: 800; color: var(--sky-deep); letter-spacing: .06em; }

/* bento */
.bento-sec {
  padding: 72px 0 88px;
  background: linear-gradient(180deg, #ebe4da, var(--paper));
  border-block: 1px solid var(--line);
}
.bento {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr;
  grid-template-rows: auto auto;
  gap: 14px;
}
.cell {
  position: relative; padding: 24px; border-radius: 24px; overflow: hidden;
  background: var(--panel); border: 1px solid var(--line);
  box-shadow: 0 14px 32px rgba(26,22,18,.06);
}
.cell.span2 { grid-row: 1 / 3; background: linear-gradient(160deg, #2a8fc4, #1a6f9a); color: #fff; border: 0; }
.cell.span2 p { color: rgba(255,255,255,.88); }
.cell.hot { background: linear-gradient(145deg, #ff6a5f, var(--red-deep)); color: #fff; border: 0; }
.cell.hot p { color: rgba(255,255,255,.9); }
.cell.tan { background: linear-gradient(145deg, #efe0c8, #dcc3a0); }
.cell .badge {
  display: inline-flex; padding: 4px 10px; border-radius: 999px;
  font-size: 11px; font-weight: 800; letter-spacing: .08em;
  background: rgba(255,255,255,.18); margin-bottom: 10px;
}
.cell:not(.span2):not(.hot) .badge { background: rgba(78,176,226,.15); color: var(--sky-deep); }
.cell h3 { font-size: 20px; font-weight: 900; margin-bottom: 8px; }
.cell p { font-size: 14px; color: var(--mute); }
.cell ul { margin-top: 16px; display: grid; gap: 8px; }
.cell li {
  display: flex; gap: 8px; align-items: flex-start;
  padding: 10px 12px; border-radius: 12px; background: rgba(255,255,255,.12); font-size: 13px;
}
.cell:not(.span2):not(.hot) li { background: rgba(26,22,18,.04); }

/* screens 2x2 */
.gallery {
  padding: 88px 0;
  background: var(--panel);
}
.gallery-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 16px;
}
.gallery-card {
  display: grid; grid-template-columns: .9fr 1.1fr; gap: 0;
  border-radius: 24px; overflow: hidden; border: 1px solid var(--line);
  background: var(--paper); min-height: 220px;
}
.gallery-card:nth-child(2), .gallery-card:nth-child(3) { direction: rtl; }
.gallery-card:nth-child(2) > *, .gallery-card:nth-child(3) > * { direction: ltr; }
.gallery-card .media { background: #1f1a16; display: grid; place-items: center; padding: 18px; }
.gallery-card img {
  width: min(160px, 70%); height: auto; border-radius: 18px;
  box-shadow: 0 16px 32px rgba(0,0,0,.3);
}
.gallery-card .copy { padding: 24px 22px; display: flex; flex-direction: column; justify-content: center; }
.gallery-card .copy b { color: var(--red); font-size: 12px; letter-spacing: .12em; margin-bottom: 8px; }
.gallery-card .copy h3 { font-size: 20px; font-weight: 900; margin-bottom: 8px; }
.gallery-card .copy p { font-size: 14px; color: var(--mute); }

/* timeline path */
.route {
  padding: 80px 0;
  background:
    radial-gradient(ellipse at 10% 30%, rgba(78,176,226,.14), transparent 45%),
    var(--paper);
}
.route-list { display: grid; gap: 0; counter-reset: step; }
.route-item {
  position: relative;
  display: grid; grid-template-columns: 100px 1fr; gap: 20px;
  padding: 0 0 28px 28px;
  border-left: 3px solid rgba(78,176,226,.35);
  margin-left: 20px;
}
.route-item::before {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  position: absolute; left: -22px; top: 0;
  width: 40px; height: 40px; border-radius: 14px;
  display: grid; place-items: center;
  background: var(--red); color: #fff; font-weight: 900; font-size: 13px;
  box-shadow: 0 0 0 6px var(--paper);
}
.route-item .aside {
  font-family: var(--display); font-size: 28px; color: rgba(26,22,18,.12); line-height: 1;
}
.route-item h3 { font-size: 20px; font-weight: 900; margin-bottom: 6px; }
.route-item p { color: var(--mute); font-size: 14px; max-width: 44em; }
.route-item .hint {
  display: inline-flex; margin-top: 10px; padding: 5px 10px; border-radius: 8px;
  background: rgba(78,176,226,.12); color: var(--sky-deep); font-size: 12px; font-weight: 700;
}

/* feed */
.feed {
  padding: 80px 0; background: #1f1a16; color: #f4ebe3;
}
.feed .sec-head .label { color: #7fd0f0; }
.feed .sec-head p { color: #a89888; }
.feed-rail {
  display: grid; grid-template-columns: repeat(12, 1fr); gap: 14px;
}
.feed-card {
  grid-column: span 4; padding: 20px; border-radius: 20px;
  background: rgba(255,255,255,.04); border: 1px solid rgba(255,255,255,.08);
}
.feed-card:nth-child(1) { grid-column: span 5; background: rgba(78,176,226,.1); }
.feed-card:nth-child(2) { grid-column: span 7; margin-top: 24px; }
.feed-card:nth-child(3) { grid-column: span 7; }
.feed-card:nth-child(4) { grid-column: span 5; margin-top: -16px; background: rgba(232,57,47,.1); }
.feed-card .meta { display: flex; justify-content: space-between; gap: 10px; font-size: 12px; color: #8f8174; font-weight: 700; margin-bottom: 10px; }
.feed-card h3 { font-size: 16px; font-weight: 900; margin-bottom: 8px; }
.feed-card p { font-size: 13px; color: #b8a99a; }

/* faq */
.faq {
  padding: 80px 0;
  background: var(--box-soft);
}
.faq-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 28px; }
.faq details {
  background: var(--panel); border-radius: 16px; padding: 14px 18px; margin-bottom: 10px;
  border: 1px solid rgba(212,180,138,.45);
}
.faq summary {
  cursor: pointer; list-style: none; font-weight: 800; font-size: 15px;
  display: flex; justify-content: space-between; gap: 12px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--red); font-size: 20px; }
.faq details[open] summary::after { content: "–"; }
.faq details p { margin-top: 10px; color: var(--mute); font-size: 14px; line-height: 1.8; }

/* voices timeline */
.voices { padding: 80px 0; background: var(--panel); }
.voice-timeline { display: grid; gap: 0; }
.voice {
  display: grid; grid-template-columns: 160px 1fr; gap: 18px;
  padding: 20px 0; border-bottom: 1px solid var(--line);
}
.voice:last-child { border-bottom: 0; }
.voice time { font-size: 12px; font-weight: 800; color: var(--mute); padding-top: 4px; }
.voice strong { display: block; font-size: 15px; font-weight: 900; margin-bottom: 6px; }
.voice p { font-size: 14px; color: #4a4038; line-height: 1.8; max-width: 48em; }

/* get */
.get {
  padding: 70px 0 88px; text-align: center;
  background: linear-gradient(180deg, #fff5f3, #ffe8e4);
  border-top: 1px solid rgba(232,57,47,.15);
}
.get h2 { font-family: var(--display); font-size: clamp(28px, 4vw, 42px); font-weight: 400; }
.get p { margin: 12px auto 24px; max-width: 30em; color: var(--mute); }

.foot {
  padding: 36px var(--gap) 48px; background: var(--foot); color: #b0a498; font-size: 13px;
}
.foot-brand {
  display: inline-flex; align-items: center; gap: 10px; margin-bottom: 10px;
  color: #fff; font-weight: 800;
}
.foot-brand img { width: 28px; height: 28px; border-radius: 8px; background: #fff; }
.foot nav { display: flex; flex-wrap: wrap; gap: 14px; margin: 14px 0 10px; }
.foot nav a:hover { color: var(--sky); }

#interaction-complaint-button { color: #1f2430 !important; font-weight: 700; }
#interaction-complaint-button:hover { color: #1f2430 !important; }
.backtop {
  position: fixed; right: 24px; bottom: 84px; z-index: 40;
  width: 44px; height: 44px; border-radius: 12px;
  background: var(--red); color: #fff; display: grid; place-items: center;
  opacity: 0; pointer-events: none; transition: opacity .2s;
  box-shadow: 0 2px 6px rgba(232,57,47,.35);
}
.backtop.on { opacity: 1; pointer-events: auto; }

.fade { opacity: 0; transform: translateY(14px); transition: opacity .5s ease, transform .5s ease; }
.fade.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .fade { opacity: 1; transform: none; transition: none; }
  .hero-copy .kicker i { animation: none; }
}

@media (max-width: 960px) {
  .nav { display: none; }
  .nav.open {
    display: flex; position: absolute; top: var(--header); left: 0; right: 0;
    flex-direction: column; gap: 0; padding: 10px; background: #fff8f2; border-bottom: 1px solid var(--line);
  }
  .nav a { padding: 12px; color: var(--ink); }
  .menu { display: grid; place-items: center; margin-left: auto; }
  .mast-cta { display: none; }
  .hero-grid {
    grid-template-columns: 1fr;
    grid-template-areas: "copy" "cta" "console";
  }
  .hero-copy { grid-area: copy; }
  .hero-cta { grid-area: cta; margin-top: 0; }
  .hero-cta .btn-dl { width: 100%; justify-content: center; }
  .console { grid-area: console; }
  .console-body, .channel-panel.is-on, .bento, .gallery-grid, .faq-grid, .voice, .route-item, .feed-rail {
    grid-template-columns: 1fr;
  }
  .cell.span2 { grid-row: auto; }
  .gallery-card, .gallery-card:nth-child(2), .gallery-card:nth-child(3) {
    grid-template-columns: 1fr; direction: ltr;
  }
  .gallery-card .media { padding: 24px; }
  .feed-card, .feed-card:nth-child(n) { grid-column: auto; margin-top: 0; }
  .chip-float { display: none; }
  .route-item { margin-left: 12px; padding-left: 24px; }
  .backtop { right: 16px; bottom: 76px; }
}