/* ═══════════════════════════════════════════════════════════
   广中小悠 · v6「现场」
   表达方式：时间纪实 —— 把社团的一个下午按时间放给你看。
   没有成员点名册（匿名人群 + 虚位以待），
   没有功能清单（一场下午的现场回放，结尾刻意「未完待续」）。
   品牌底线不变：岩石黑实心按钮；红色只做 LIVE 信号色。
   ═══════════════════════════════════════════════════════════ */

:root {
  --ink: #17161F;
  --ink-hover: #2B2935;
  --ink-rgb: 23, 22, 31;
  --bg: #FAF8F4;
  --bg-band: #F3F0E9;
  --paper: #FFFFFF;
  --text-1: #17161F;
  --text-2: #5C5866;
  --text-3: #9B96A3;
  --line: #E8E4DB;
  --iris: #6E56CF;
  --iris-rgb: 110, 86, 207;
  --iris-light: #F3F0FE;
  --live: #E5484D;
  --live-rgb: 229, 72, 77;
  --mint: #12A594;
  --amber: #D97706;

  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --radius: 18px;
  --font: -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, Inter, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --shadow-card: 0 2px 10px rgba(23, 22, 31, 0.05), 0 1px 3px rgba(23, 22, 31, 0.04);
  --shadow-lift: 0 10px 30px rgba(23, 22, 31, 0.1), 0 3px 8px rgba(23, 22, 31, 0.06);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; overflow-x: clip; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text-1);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
::selection { background: rgba(var(--iris-rgb), 0.16); color: var(--text-1); }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; }
:focus-visible { outline: 2px solid rgba(var(--iris-rgb), 0.65); outline-offset: 2px; border-radius: 8px; }
section { scroll-margin-top: 84px; }
.mono { font-family: var(--mono); font-weight: 600; }
.ic { width: 1.15em; height: 1.15em; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; flex: none; }
.ic-lg { width: 1.6em; height: 1.6em; }

.progress-hairline { position: fixed; inset: 0 0 auto 0; height: 3px; z-index: 120; pointer-events: none; }
.progress-hairline span { display: block; height: 100%; background: var(--ink); transform: scaleX(0); transform-origin: 0 50%; }

/* ── 导航 ──────────────────────────────────────────────── */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  background: rgba(250, 248, 244, 0.82);
  -webkit-backdrop-filter: blur(16px) saturate(1.4);
  backdrop-filter: blur(16px) saturate(1.4);
  border-bottom: 1px solid rgba(23, 22, 31, 0.07);
  transition: box-shadow 0.35s var(--ease);
}
.nav.scrolled { box-shadow: 0 8px 26px rgba(23, 22, 31, 0.09); }
.nav-inner { max-width: 1180px; margin: 0 auto; padding: 0 28px; height: 62px; display: flex; align-items: center; gap: 22px; }
.brand { display: flex; align-items: center; gap: 10px; flex: none; }
.brand-emblem { width: 28px; height: 28px; }
.brand-name { font-size: 17px; font-weight: 800; letter-spacing: 0.02em; }
.brand-badge { font-size: 11px; color: var(--text-2); background: #fff; border: 1px solid var(--line); border-radius: 999px; padding: 2.5px 10px; letter-spacing: 0.04em; white-space: nowrap; }
.live-badge {
  display: inline-flex; align-items: center; gap: 7px; flex: none;
  font-family: var(--mono); font-size: 11.5px; font-weight: 700; letter-spacing: 0.18em;
  color: var(--live); background: rgba(var(--live-rgb), 0.07); border: 1px solid rgba(var(--live-rgb), 0.3);
  border-radius: 999px; padding: 4px 13px 4px 11px; cursor: pointer;
  transition: background 0.25s, border-color 0.25s, transform 0.3s var(--ease);
}
.live-badge:hover { background: rgba(var(--live-rgb), 0.12); border-color: rgba(var(--live-rgb), 0.5); transform: translateY(-1px); }
.live-dot { position: relative; width: 7px; height: 7px; border-radius: 50%; background: var(--live); flex: none; }
.live-dot::after { content: ""; position: absolute; inset: -3.5px; border-radius: 50%; border: 1.5px solid rgba(var(--live-rgb), 0.5); animation: liveBreath 1.8s var(--ease) infinite; }
@keyframes liveBreath { 0%, 100% { transform: scale(0.7); opacity: 0.9; } 50% { transform: scale(1.3); opacity: 0.2; } }
.nav-links { display: flex; gap: 4px; margin-left: auto; }
.nav-links a { font-size: 13.5px; font-weight: 600; color: var(--text-2); padding: 7px 13px; border-radius: 999px; transition: color 0.2s, background 0.25s var(--ease); }
.nav-links a:hover { color: var(--text-1); background: rgba(var(--iris-rgb), 0.07); }
.nav-links a.is-active { color: var(--iris); background: var(--iris-light); }
.btn-nav { margin-left: 4px; }
@media (max-width: 900px) { .brand-badge, .nav-links, .live-badge { display: none; } .btn-nav { margin-left: auto; } }

/* ── 按钮 ──────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 9px;
  font-size: 14.5px; font-weight: 700; letter-spacing: 0.01em;
  border: none; border-radius: 14px; padding: 12px 22px; cursor: pointer;
  transition: transform 0.35s var(--ease), background 0.25s, box-shadow 0.35s var(--ease), border-color 0.25s, opacity 0.25s;
  white-space: nowrap;
}
.btn-lg { padding: 15px 26px; font-size: 15.5px; border-radius: 16px; }
.btn-ink { background: var(--ink); color: #fff; box-shadow: 0 3px 0 rgba(var(--ink-rgb), 0.85), 0 12px 30px -10px rgba(var(--ink-rgb), 0.35); }
.btn-ink:hover { background: var(--ink-hover); transform: translateY(-2px); box-shadow: 0 5px 0 rgba(var(--ink-rgb), 0.85), 0 18px 40px -10px rgba(var(--ink-rgb), 0.4); }
.btn-ghost { background: #fff; color: var(--text-1); border: 1px solid var(--line); box-shadow: var(--shadow-card); }
.btn-ghost:hover { border-color: rgba(var(--iris-rgb), 0.45); background: var(--iris-light); transform: translateY(-2px); }
.btn-disabled { opacity: 0.45; cursor: not-allowed; transform: none !important; box-shadow: none; }
.btn:active { transform: translateY(0) scale(0.985); }
.btn-meta { font-size: 11px; font-weight: 600; color: rgba(255, 255, 255, 0.6); border-left: 1px solid rgba(255, 255, 255, 0.22); padding-left: 10px; margin-left: 2px; letter-spacing: 0.02em; }

/* ── Hero ──────────────────────────────────────────────── */
.hero { position: relative; overflow: hidden; }
.hero::before {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(560px 300px at 82% 8%, rgba(var(--iris-rgb), 0.1), transparent 70%),
    radial-gradient(480px 260px at 8% 16%, rgba(var(--live-rgb), 0.05), transparent 70%);
  pointer-events: none;
}
.hero-inner { position: relative; max-width: 860px; margin: 0 auto; padding: 150px 28px 84px; }
.rec-row { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 26px; }
.rec-chip {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--mono); font-size: 12px; font-weight: 700; letter-spacing: 0.16em;
  color: var(--live); border: 1px solid rgba(var(--live-rgb), 0.35); border-radius: 10px; padding: 6px 14px;
  background: rgba(var(--live-rgb), 0.06);
}
.rec-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--live); animation: recBlink 1.4s steps(1) infinite; }
@keyframes recBlink { 0%, 60% { opacity: 1; } 61%, 100% { opacity: 0.15; } }
.clock-chip { font-size: 12.5px; color: var(--text-2); background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 6px 14px; letter-spacing: 0.08em; box-shadow: var(--shadow-card); }
.clock-note { font-size: 12.5px; color: var(--text-3); letter-spacing: 0.1em; }
.hero-title { font-size: clamp(33px, 5.6vw, 62px); line-height: 1.22; font-weight: 800; letter-spacing: 0.01em; margin-bottom: 22px; }
.hero-title .marker { white-space: nowrap; }
.marker { background-image: linear-gradient(rgba(var(--iris-rgb), 0.18), rgba(var(--iris-rgb), 0.18)); background-repeat: no-repeat; background-size: 0% 46%; background-position: 0 82%; transition: background-size 1s var(--ease) 0.5s; }
.reveal.in .marker, h1.marker { background-size: 100% 46%; }
.hero-sub { font-size: 16px; color: var(--text-2); max-width: 600px; }
.hero-sub b { color: var(--text-1); }
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 30px; }
.hero-trust { list-style: none; display: flex; flex-wrap: wrap; gap: 8px 22px; margin-top: 24px; }
.hero-trust li { font-size: 12.5px; color: var(--text-3); display: flex; align-items: center; gap: 7px; }
.hero-trust li::before { content: ""; width: 4px; height: 4px; border-radius: 50%; background: rgba(var(--iris-rgb), 0.7); }
.clock-line { margin-top: 18px; font-size: 13px; color: var(--text-3); }
.clock-line b { color: var(--text-1); }
.hero-strip {
  position: relative; height: 22px; margin: 0 28px;
  background: repeating-linear-gradient(90deg, var(--ink) 0 26px, transparent 26px 34px);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
  opacity: 0.5;
}

/* ── 章节骨架 ──────────────────────────────────────────── */
.section { position: relative; padding: 104px 28px; max-width: 1180px; margin: 0 auto; }
.band { max-width: none; background: var(--bg-band); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-head { max-width: 680px; margin-bottom: 56px; }
.section-head h2 { font-size: clamp(28px, 3.6vw, 42px); line-height: 1.32; font-weight: 800; margin: 14px 0 14px; }
.ts-inline { color: var(--live); font-size: 0.72em; letter-spacing: 0.06em; }
.section-sub { font-size: 15.5px; color: var(--text-2); }

/* ── 时间轴现场 ────────────────────────────────────────── */
.timeline { position: relative; max-width: 720px; margin: 0 auto; padding-left: 64px; }
.spine { position: absolute; left: 22px; top: 8px; bottom: 8px; width: 2px; background: var(--line); border-radius: 2px; }
.spine-fill { position: absolute; left: 22px; top: 8px; width: 2px; height: 0; border-radius: 2px; background: linear-gradient(180deg, var(--live), var(--iris)); }
.spine-head {
  position: absolute; left: 16px; top: 8px; width: 14px; height: 14px; border-radius: 50%;
  background: var(--live); box-shadow: 0 0 0 5px rgba(var(--live-rgb), 0.15);
  animation: headPulse 2s var(--ease) infinite;
}
@keyframes headPulse { 0%, 100% { box-shadow: 0 0 0 4px rgba(var(--live-rgb), 0.18); } 50% { box-shadow: 0 0 0 9px rgba(var(--live-rgb), 0.08); } }

.moment { position: relative; padding-bottom: 38px; }
.m-dot {
  position: absolute; left: -50px; top: 30px; width: 16px; height: 16px; border-radius: 50%;
  background: var(--bg); border: 2px solid rgba(23, 22, 31, 0.28);
  transition: background 0.5s var(--ease), border-color 0.5s var(--ease), box-shadow 0.5s var(--ease);
}
.moment.in .m-dot { background: var(--live); border-color: var(--live); box-shadow: 0 0 0 4px rgba(var(--live-rgb), 0.14); }
.moment-open .m-dot { background: var(--iris); border-color: var(--iris); box-shadow: 0 0 0 4px rgba(var(--iris-rgb), 0.14); }

.m-card {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 20px 22px; box-shadow: var(--shadow-card);
  transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease);
}
.m-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lift); }
.m-head { display: flex; align-items: baseline; gap: 12px; margin-bottom: 12px; flex-wrap: wrap; }
.m-ts { font-size: 13px; color: var(--live); letter-spacing: 0.08em; }
.m-head h3 { font-size: 17px; font-weight: 800; }
.m-note { font-size: 13.5px; color: var(--text-2); margin-top: 12px; }
.m-note b { color: var(--text-1); }

.bubble-user {
  display: inline-block; max-width: 88%;
  background: var(--iris-light); border: 1px solid #D9CDF6; border-radius: 16px 16px 16px 4px;
  padding: 12px 16px; font-size: 14.5px; color: var(--text-1);
}
.bubble-user b { color: var(--iris); }

.m-faces { display: flex; gap: 12px; }
.m-face {
  width: 54px; height: 54px; border-radius: 50%; overflow: hidden; position: relative;
  background: #fff; border: 2px solid var(--line); box-shadow: var(--shadow-card);
  opacity: 0; transform: scale(0.5);
}
.m-face::after { content: ""; position: absolute; inset: -2px; border-radius: 50%; box-shadow: inset 0 -10px 16px rgba(var(--iris-rgb), 0.18); }
.m-face img { width: 100%; height: 100%; object-fit: cover; }
.moment.in .m-face { animation: faceIn 0.6s var(--ease) forwards; }
.moment.in .m-face:nth-child(1) { animation-delay: 0.1s; }
.moment.in .m-face:nth-child(2) { animation-delay: 0.32s; }
.moment.in .m-face:nth-child(3) { animation-delay: 0.54s; }
@keyframes faceIn { 0% { opacity: 0; transform: scale(0.5) translateY(10px); } 70% { transform: scale(1.08) translateY(-2px); } 100% { opacity: 1; transform: none; } }

.work-row { display: flex; gap: 12px; flex-wrap: wrap; }
.work-card {
  display: flex; align-items: center; gap: 9px;
  background: var(--bg); border: 1px solid var(--line); border-radius: 12px; padding: 10px 14px;
  font-size: 13px;
}
.work-card b { font-weight: 700; }
.work-card i { font-style: normal; font-size: 11.5px; color: var(--text-3); letter-spacing: 0.06em; }
.work-state { width: 8px; height: 8px; border-radius: 50%; flex: none; }
.ws-run { background: var(--amber); box-shadow: 0 0 0 0 rgba(217, 119, 6, 0.5); animation: runBreath 2s var(--ease) infinite; }
@keyframes runBreath { 0%, 100% { box-shadow: 0 0 0 0 rgba(217, 119, 6, 0.45); } 50% { box-shadow: 0 0 0 6px rgba(217, 119, 6, 0.12); } }
.ws-done { background: var(--mint); }

.mock-web {
  max-width: 380px; border-radius: 14px; border: 1px solid var(--line); overflow: hidden;
  background: #fff; box-shadow: var(--shadow-card);
}
.mw-dots { display: flex; gap: 6px; padding: 10px 14px; border-bottom: 1px solid var(--line); background: var(--bg); }
.mw-dots i { width: 9px; height: 9px; border-radius: 50%; background: rgba(23, 22, 31, 0.14); }
.mw-title { display: block; height: 12px; width: 42%; border-radius: 6px; background: rgba(var(--iris-rgb), 0.3); margin: 16px 18px 6px; }
.mw-body { display: flex; gap: 16px; padding: 10px 18px 18px; }
.mw-bars { flex: 1.6; display: flex; align-items: flex-end; gap: 8px; height: 92px; border-bottom: 2px solid var(--line); padding-bottom: 2px; }
.mw-bars i { flex: 1; height: var(--h); border-radius: 4px 4px 0 0; background: linear-gradient(180deg, rgba(var(--iris-rgb), 0.85), rgba(var(--iris-rgb), 0.35)); }
.mw-bars i:nth-child(2n) { background: linear-gradient(180deg, rgba(18, 165, 148, 0.8), rgba(18, 165, 148, 0.3)); }
.mw-side { flex: 1; display: flex; flex-direction: column; gap: 9px; }
.mw-side span { display: block; height: 10px; border-radius: 5px; background: rgba(23, 22, 31, 0.1); }
.mw-side span:nth-child(3) { height: 34px; border-radius: 8px; background: rgba(var(--iris-rgb), 0.14); }

.mini-table { position: relative; height: 150px; margin: 6px 0; }
.mt-oval {
  position: absolute; left: 50%; top: 56%; translate: -50% -50%; width: 74%; height: 64%;
  border-radius: 50%;
  background: radial-gradient(closest-side, rgba(var(--iris-rgb), 0.1), rgba(var(--iris-rgb), 0.03) 70%, transparent);
  border: 2px solid rgba(var(--iris-rgb), 0.25);
}
.mt-seat { position: absolute; width: 50px; height: 50px; border-radius: 50%; overflow: hidden; background: #fff; border: 2px solid rgba(var(--g), 0.6); box-shadow: 0 4px 14px rgba(23, 22, 31, 0.12); }
.mt-seat img { width: 100%; height: 100%; object-fit: cover; }
.mt-seat::after { content: ""; position: absolute; inset: -2px; border-radius: 50%; border: 2px solid rgba(var(--g), 0.5); opacity: 0; animation: seatRipple 3.2s var(--ease) infinite; animation-delay: var(--rd, 0s); }
.mt-1 { left: 12%; top: 6%; --rd: 0s; }
.mt-2 { right: 12%; top: 6%; --rd: 0.9s; }
.mt-3 { left: 20%; bottom: 0; --rd: 1.8s; }
.mt-4 { right: 20%; bottom: 0; --rd: 2.7s; }
@keyframes seatRipple { 0% { transform: scale(0.9); opacity: 0.85; } 100% { transform: scale(1.5); opacity: 0; } }

.notes-card { max-width: 400px; background: var(--paper); border: 1px dashed rgba(23, 22, 31, 0.25); border-radius: 14px; padding: 16px 18px; }
.notes-card b { display: block; font-size: 13px; letter-spacing: 0.12em; color: var(--text-1); margin-bottom: 10px; }
.notes-card ul { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.notes-card li { display: flex; align-items: center; gap: 10px; font-size: 13.5px; color: var(--text-2); }
.nk { width: 10px; height: 10px; border-radius: 3px; flex: none; }
.nk-1 { background: rgba(var(--iris-rgb), 0.75); }
.nk-2 { background: rgba(240, 163, 198, 0.85); }
.nk-3 { background: rgba(217, 119, 6, 0.6); }
.nk-4 { background: rgba(18, 165, 148, 0.7); }

.moment-open { padding-bottom: 10px; }
.m-open-text { font-size: clamp(30px, 4.6vw, 48px); font-weight: 800; letter-spacing: 0.04em; color: var(--text-1); margin: 4px 0 10px; }
.cursor { color: var(--live); font-weight: 400; animation: caretBlink 1.1s steps(1) infinite; margin-left: 6px; }
@keyframes caretBlink { 0%, 55% { opacity: 1; } 56%, 100% { opacity: 0; } }

/* ── 人群 ──────────────────────────────────────────────── */
.crowd { overflow: hidden; -webkit-mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent); mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent); }
.crowd + .crowd { margin-top: 18px; }
.crowd-track { display: flex; width: max-content; padding: 4px 0; animation: crowdFlow 40s linear infinite; will-change: transform; }
.crowd-b .crowd-track { animation-direction: reverse; animation-duration: 46s; }
.crowd-set { display: flex; flex: none; }
/* 无 JS 时静止展示一组（不滑动，避免滑出空白） */
html:not(.js) .crowd-track { animation: none; }
@keyframes crowdFlow { from { transform: translateX(0); } to { transform: translateX(-50%); } }
.crowd-chip {
  width: 58px; height: 58px; border-radius: 50%; overflow: hidden; flex: none; margin-right: 16px;
  background: #fff; border: 1px solid rgba(23, 22, 31, 0.22); box-shadow: var(--shadow-card);
}
.crowd-chip img { width: 100%; height: 100%; object-fit: cover; }
.crowd-chip.cq { display: grid; place-items: center; font-size: 20px; font-weight: 800; color: var(--iris); border-style: dashed; background: rgba(var(--iris-rgb), 0.05); overflow: visible; animation: qBreath 3s var(--ease) infinite; }
@keyframes qBreath { 0%, 100% { opacity: 0.55; } 50% { opacity: 1; } }

.seat-save {
  margin-top: 44px; display: flex; align-items: center; gap: 18px;
  background: var(--paper); border: 1px solid var(--line); border-radius: 20px; padding: 20px 24px;
  box-shadow: var(--shadow-card); flex-wrap: wrap;
}
.seat-save b { font-size: 16.5px; display: block; }
.seat-save p { font-size: 13.5px; color: var(--text-2); margin-top: 3px; max-width: 460px; }
.seat-chip {
  width: 52px; height: 52px; border-radius: 50%; flex: none;
  display: grid; place-items: center; font-size: 19px; font-weight: 800; color: var(--iris);
  border: 2px dashed rgba(var(--iris-rgb), 0.5); background: rgba(var(--iris-rgb), 0.06);
}
.seat-save .btn { margin-left: auto; }

/* ── 下载 ──────────────────────────────────────────────── */
.dl-wrap { max-width: 980px; margin: 0 auto; }
.dl-head { text-align: center; margin-bottom: 44px; }
.dl-head h2 { font-size: clamp(28px, 3.6vw, 42px); font-weight: 800; margin: 14px 0 12px; }
.dl-cards { display: grid; grid-template-columns: 1.25fr 1fr; gap: 22px; }
.dl-card {
  border-radius: 20px; padding: 28px; background: var(--paper); border: 1px solid var(--line);
  box-shadow: var(--shadow-card);
  display: flex; flex-direction: column; gap: 20px;
}
.dl-card.is-primary { border-color: rgba(var(--iris-rgb), 0.4); box-shadow: var(--shadow-lift); }
.dl-card.is-muted { opacity: 0.75; }
.dl-os { display: flex; align-items: center; gap: 14px; }
.dl-os h3 { font-size: 18px; font-weight: 800; }
.dl-os span { font-size: 12.5px; color: var(--text-3); display: block; margin-top: 2px; }
.dl-actions { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.dl-meta { font-size: 12.5px; color: var(--text-3); }
.dl-promise { text-align: center; font-size: 13px; color: var(--text-3); margin-top: 34px; display: flex; align-items: center; justify-content: center; gap: 14px; flex-wrap: wrap; }
.dl-sep { width: 4px; height: 4px; border-radius: 50%; background: rgba(var(--iris-rgb), 0.5); }
@media (max-width: 780px) { .dl-cards { grid-template-columns: 1fr; } }

/* ── 页脚 ──────────────────────────────────────────────── */
.footer { border-top: 1px solid var(--line); background: var(--bg-band); }
.footer-inner { max-width: 1180px; margin: 0 auto; padding: 46px 28px; display: flex; flex-wrap: wrap; gap: 26px 40px; align-items: flex-start; justify-content: space-between; }
.footer-brand { display: flex; gap: 12px; align-items: center; }
.footer-emblem { width: 34px; height: 34px; }
.footer-brand b { font-size: 16px; display: block; }
.footer-brand p { font-size: 12.5px; color: var(--text-3); letter-spacing: 0.06em; }
.footer-links { display: flex; gap: 6px; flex-wrap: wrap; }
.footer-links a { font-size: 13px; color: var(--text-2); padding: 6px 12px; border-radius: 999px; transition: color 0.2s, background 0.25s var(--ease); }
.footer-links a:hover { color: var(--text-1); background: rgba(23, 22, 31, 0.06); }
.footer-legal { text-align: right; }
.footer-legal p { font-size: 12.5px; color: var(--text-3); }
.footer-legal a { color: inherit; text-decoration: underline; text-underline-offset: 3px; transition: opacity 0.2s; }
.footer-legal a:hover { opacity: 0.75; }
.footer-versions { margin-top: 10px; display: flex; gap: 8px; justify-content: flex-end; align-items: center; flex-wrap: wrap; }
.footer-versions a { font-size: 11.5px; color: var(--text-2); background: #fff; border: 1px solid var(--line); border-radius: 999px; padding: 3px 12px; transition: all 0.25s var(--ease); }
.footer-versions a:hover { color: var(--text-1); border-color: rgba(var(--iris-rgb), 0.5); background: var(--iris-light); }
.footer-tbc { margin-top: 10px; font-size: 11.5px; color: var(--text-3); letter-spacing: 0.14em; }
@media (max-width: 860px) { .footer-legal { text-align: left; } .footer-versions { justify-content: flex-start; } }

/* ── 回顶 & Toast ──────────────────────────────────────── */
.backtop {
  position: fixed; right: 26px; bottom: 26px; z-index: 90; width: 46px; height: 46px; border-radius: 16px; border: none; cursor: pointer;
  background: var(--ink); color: #fff; display: grid; place-items: center;
  box-shadow: 0 4px 0 rgba(var(--ink-rgb), 0.3);
  opacity: 0; pointer-events: none; transform: translateY(14px);
  transition: opacity 0.35s var(--ease), transform 0.35s var(--ease), background 0.25s;
}
.backtop.show { opacity: 1; pointer-events: auto; transform: none; }
.backtop:hover { background: var(--ink-hover); transform: translateY(-2px); }
.toast {
  position: fixed; left: 50%; bottom: 34px; z-index: 130; translate: -50% 20px;
  background: var(--ink); color: #fff; font-size: 13.5px; font-weight: 600; padding: 12px 22px; border-radius: 16px;
  box-shadow: 0 4px 0 rgba(var(--ink-rgb), 0.3);
  opacity: 0; pointer-events: none; transition: opacity 0.3s var(--ease), translate 0.3s var(--ease);
  max-width: min(88vw, 560px); text-align: center;
}
.toast.show { opacity: 1; translate: -50% 0; }

/* ── 滚动揭示 ──────────────────────────────────────────── */
html.js .reveal { opacity: 0; transform: translateY(28px); transition: opacity 0.6s var(--ease), transform 0.7s var(--ease); transition-delay: var(--d, 0s); will-change: opacity, transform; }
html.js .reveal.in { opacity: 1; transform: none; }

/* ── 响应式 ────────────────────────────────────────────── */
@media (max-width: 760px) {
  .section { padding: 84px 22px; }
  .hero-inner { padding: 128px 22px 66px; }
  .hero-strip { margin: 0 22px; }
  .timeline { padding-left: 44px; }
  .spine, .spine-fill { left: 12px; }
  .spine-head { left: 6px; }
  .m-dot { left: -23px; }
  .bubble-user { max-width: 100%; }
  .mt-1 { left: 2%; } .mt-2 { right: 2%; } .mt-3 { left: 8%; } .mt-4 { right: 8%; }
  .seat-save .btn { margin-left: 0; }
}
@media (max-width: 560px) {
  .hero-cta .btn-lg { width: 100%; justify-content: center; }
  .crowd-chip { width: 50px; height: 50px; }
  .m-face { width: 48px; height: 48px; }
}