/* ============================================================
   HelloWorld · helloworldfanyi.com ——「译声 · 声波同传」
   亮色调 + 深海军蓝 #1e40af + 声波青 #0ea5e9;居中 hero + 声波形图 + 同传双语气泡;无衬线 + 等宽
   ============================================================ */

:root {
  --bg: #f5f8ff;
  --bg-2: #eef3fc;
  --bg-3: #e3ecf9;
  --panel: rgba(255, 255, 255, .72);
  --panel-2: #ffffff;
  --glass: rgba(255, 255, 255, .6);
  --line: rgba(30, 64, 175, .14);
  --line-2: rgba(30, 64, 175, .26);
  --ink: #16203a;
  --ink-2: #34425e;
  --muted: #64748b;
  --navy: #1e40af;
  --navy-2: #16337f;
  --cyan: #0ea5e9;
  --amber: #f59e0b;
  --sans: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --mono: "SF Mono", "Cascadia Code", Consolas, "Courier New", monospace;
  --r: 18px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--sans); background: var(--bg); color: var(--ink);
  line-height: 1.7; -webkit-font-smoothing: antialiased; overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
ul { list-style: none; }
h1, h2, h3, h4 { line-height: 1.25; }

.wrap { width: min(1080px, 92%); margin: 0 auto; }
.sec { padding: 76px 0; position: relative; }
.sec-h { max-width: 680px; margin: 0 auto 46px; text-align: center; }
.sec-h.center { text-align: center; }
.sec-h .t {
  display: inline-block; font-family: var(--mono); font-size: 12px; letter-spacing: 2.5px;
  color: var(--navy); border: 1px solid rgba(30, 64, 175, .3); border-radius: 999px;
  padding: 6px 16px; margin-bottom: 18px; background: rgba(30, 64, 175, .06); text-transform: uppercase;
}
.sec-h h2 { font-size: 34px; font-weight: 800; letter-spacing: -.5px; }
.sec-h p { color: var(--muted); margin-top: 14px; }
.center { text-align: center; padding: 96px 0; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-weight: 700; border-radius: 12px; border: 1px solid transparent;
  cursor: pointer; transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
}
.btn:active { transform: translateY(1px); }
.btn-primary {
  background: linear-gradient(135deg, var(--navy), var(--cyan));
  color: #ffffff; box-shadow: 0 12px 34px -12px rgba(30, 64, 175, .55);
}
.btn-primary:hover { box-shadow: 0 18px 44px -12px rgba(30, 64, 175, .72); }
.btn-ghost { background: var(--panel); color: var(--ink); border-color: var(--line-2); backdrop-filter: blur(10px); }
.btn-ghost:hover { border-color: var(--navy); color: var(--navy); }
.btn-outline { background: transparent; color: var(--navy); border-color: var(--navy); }
.btn-outline:hover { background: rgba(30, 64, 175, .08); }
.btn-sm { padding: 8px 16px; font-size: 13px; }
.btn-lg { padding: 15px 30px; font-size: 16px; }

/* ---------- 顶栏(实底白条 + 居中菜单) ---------- */
.top {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, .96);
  border-bottom: 1px solid var(--line);
}
.top-inner { display: flex; align-items: center; gap: 20px; height: 66px; }
.brand { display: flex; align-items: center; gap: 11px; flex-shrink: 0; }
.brand-ico { width: 34px; height: 34px; border-radius: 9px; box-shadow: 0 6px 18px -6px rgba(30, 64, 175, .5); }
.brand-name { font-weight: 800; font-size: 19px; letter-spacing: -.5px; }
.brand-tag { display: block; font-family: var(--mono); font-size: 10px; letter-spacing: 1.8px; color: var(--navy); margin-top: -2px; }
.nav-wrap { margin: 0 auto; display: flex; align-items: center; gap: 2px; }
.nav-wrap > a { position: relative; padding: 8px 13px; border-radius: 9px; font-size: 14.5px; font-weight: 600; color: var(--ink-2); }
.nav-wrap > a:hover { color: var(--ink); }
.nav-wrap > a.on { color: var(--navy); }
.nav-wrap > a.on::after { content: ""; position: absolute; left: 13px; right: 13px; bottom: 3px; height: 2px; border-radius: 2px; background: var(--navy); box-shadow: 0 0 10px rgba(30, 64, 175, .5); }
.dd { position: relative; }
.dd > button { position: relative; background: none; border: none; font: inherit; font-size: 14.5px; font-weight: 600; color: var(--ink-2); padding: 8px 13px; border-radius: 9px; cursor: pointer; }
.dd:hover > button { color: var(--ink); }
.dd > button.on { color: var(--navy); }
.dd > button.on::after { content: ""; position: absolute; left: 13px; right: 13px; bottom: 3px; height: 2px; border-radius: 2px; background: var(--navy); box-shadow: 0 0 10px rgba(30, 64, 175, .5); }
.dd-menu { position: absolute; top: 100%; left: 50%; transform: translateX(-50%); min-width: 184px; background: rgba(255, 255, 255, .98); border: 1px solid var(--line-2); border-radius: 14px; box-shadow: 0 26px 60px -30px rgba(22, 32, 58, .35); padding: 8px; opacity: 0; visibility: hidden; transform: translate(-50%, 6px); transition: .18s; display: flex; flex-direction: column; z-index: 55; }
.dd:hover .dd-menu { opacity: 1; visibility: visible; transform: translate(-50%, 0); }
.dd-menu a { padding: 9px 12px; border-radius: 8px; font-size: 14px; font-weight: 500; color: var(--ink-2); }
.dd-menu a:hover { background: rgba(30, 64, 175, .08); color: var(--navy); }
.nav-toggle { display: none; background: none; border: none; color: var(--ink); font-size: 24px; cursor: pointer; }
.top-cta { margin-left: 0; flex-shrink: 0; }

/* ---------- hero:居中 + 声波光斑 ---------- */
.hero { position: relative; overflow: hidden; padding: 88px 0 90px; text-align: center; }
.hero::before {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(ellipse at 50% -8%, rgba(14, 165, 233, .16), transparent 58%),
    radial-gradient(ellipse at 12% 78%, rgba(30, 64, 175, .1), transparent 55%),
    radial-gradient(ellipse at 88% 82%, rgba(14, 165, 233, .1), transparent 52%),
    var(--bg);
}
.hero::after {
  content: ""; position: absolute; inset: 0; z-index: 0; opacity: .5; pointer-events: none;
  background-image: linear-gradient(rgba(30, 64, 175, .05) 1px, transparent 1px), linear-gradient(90deg, rgba(30, 64, 175, .05) 1px, transparent 1px);
  background-size: 44px 44px;
  -webkit-mask-image: radial-gradient(ellipse at 50% 20%, #000 30%, transparent 78%);
  mask-image: radial-gradient(ellipse at 50% 20%, #000 30%, transparent 78%);
}
.hero-inner { position: relative; z-index: 2; display: flex; flex-direction: column; align-items: center; }
.hero-copy { max-width: 780px; }
.kicker {
  display: inline-flex; align-items: center; gap: 9px;
  font-family: var(--mono); font-size: 12px; letter-spacing: 2px; color: var(--navy);
  background: rgba(255, 255, 255, .8); border: 1px solid rgba(30, 64, 175, .26);
  padding: 7px 16px; border-radius: 999px;
}
.kicker .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 12px var(--cyan); animation: blink 1.6s infinite; }
.hero-h1 { font-size: 60px; line-height: 1.08; font-weight: 900; letter-spacing: -1.5px; margin: 24px 0 18px; color: var(--ink); }
.hero-h1 em { font-style: normal; background: linear-gradient(120deg, var(--navy), var(--cyan)); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.hero-lede { font-size: 17px; color: var(--ink-2); max-width: 640px; margin: 0 auto 22px; line-height: 1.75; }
.hero-tags { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin: 0 0 28px; }
.hero-tags span { font-size: 13px; font-weight: 600; color: var(--ink-2); background: rgba(255, 255, 255, .72); border: 1px solid var(--line); border-radius: 999px; padding: 6px 14px; }
.hero-cta { display: flex; gap: 12px; justify-content: center; margin: 4px 0 12px; flex-wrap: wrap; }
.hero-note { font-family: var(--mono); font-size: 12px; color: var(--muted); }

/* 实时同传双语气泡卡 */
.interp-card {
  margin: 40px auto 0; max-width: 720px; width: 100%; text-align: left;
  background: rgba(255, 255, 255, .82); border: 1px solid rgba(30, 64, 175, .14);
  border-radius: 20px; padding: 22px 26px; box-shadow: 0 30px 60px -36px rgba(22, 32, 58, .4);
}
.interp-head { display: flex; align-items: center; gap: 9px; font-family: var(--mono); font-size: 12px; letter-spacing: 1.6px; color: var(--cyan); margin-bottom: 16px; }
.interp-dot { width: 9px; height: 9px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 12px var(--cyan); animation: blink 1.6s infinite; }
.interp-row { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 16px; }
.interp-bubble { padding: 14px 16px; border-radius: 14px; }
.interp-in { background: rgba(30, 64, 175, .06); border: 1px solid rgba(30, 64, 175, .16); }
.interp-out { background: rgba(14, 165, 233, .08); border: 1px solid rgba(14, 165, 233, .22); }
.interp-lang { display: block; font-family: var(--mono); font-size: 11px; letter-spacing: 2px; color: var(--muted); margin-bottom: 6px; text-transform: uppercase; }
.interp-txt { font-size: 18px; font-weight: 700; color: var(--ink); line-height: 1.45; }
.interp-out .interp-txt { color: var(--navy); }
.interp-mid { display: flex; flex-direction: column; align-items: center; gap: 2px; color: var(--cyan); }
.interp-mid svg { width: 28px; height: 28px; }
.interp-mid span { font-family: var(--mono); font-size: 10px; letter-spacing: 1px; color: var(--muted); }
.interp-foot { display: flex; align-items: center; justify-content: space-between; margin-top: 16px; font-family: var(--mono); font-size: 11.5px; color: var(--muted); }
.interp-bars { display: flex; align-items: flex-end; gap: 3px; height: 16px; }
.interp-bars i { width: 3px; border-radius: 2px; background: var(--cyan); height: 8px; animation: bars 1.1s ease-in-out infinite; }
.interp-bars i:nth-child(2) { animation-delay: .15s; height: 14px; }
.interp-bars i:nth-child(3) { animation-delay: .3s; height: 6px; }

@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: .15; } }
@keyframes bars { 0%, 100% { transform: scaleY(.5); } 50% { transform: scaleY(1); } }

/* ---------- 声波形图带 ---------- */
.wave-band { overflow: hidden; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: rgba(255, 255, 255, .6); padding: 22px 0 18px; position: relative; }
.wave-band .wrap { text-align: center; }
.wave-label { display: block; font-family: var(--mono); font-size: 12px; letter-spacing: 2.5px; color: var(--muted); margin-bottom: 12px; }
.wave-svg { display: block; margin: 0 auto; width: min(860px, 92%); height: 62px; }
.wave-svg .w1 { stroke: var(--navy); }
.wave-svg .w2 { stroke: var(--cyan); opacity: .75; }
.wave-svg path { fill: none; stroke-width: 2; stroke-linecap: round; animation: waveShift 6s linear infinite; }
@keyframes waveShift { from { stroke-dashoffset: 0; } to { stroke-dashoffset: -240; } }

/* ---------- 声波 stats 带 ---------- */
.stats-band { position: relative; overflow: hidden; background: linear-gradient(135deg, var(--navy) 0%, var(--navy-2) 60%, #122a6b 100%); color: #fff; padding: 72px 0; }
.stats-band::before {
  content: ""; position: absolute; inset: 0; opacity: .18; pointer-events: none;
  background-image: radial-gradient(rgba(255, 255, 255, .6) 1px, transparent 1px);
  background-size: 26px 26px;
}
.stats-head { position: relative; z-index: 1; text-align: center; margin-bottom: 40px; }
.stats-head .t { display: inline-block; font-family: var(--mono); font-size: 12px; letter-spacing: 2.5px; color: #a7d8f7; border: 1px solid rgba(167, 216, 247, .35); border-radius: 999px; padding: 6px 16px; margin-bottom: 18px; background: rgba(255, 255, 255, .06); }
.stats-head h2 { font-size: 34px; font-weight: 900; letter-spacing: -.5px; }
.stats-head p { color: rgba(255, 255, 255, .82); margin-top: 14px; max-width: 640px; margin-left: auto; margin-right: auto; }
.stats-grid { position: relative; z-index: 1; display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.stat { text-align: center; background: rgba(255, 255, 255, .08); border: 1px solid rgba(255, 255, 255, .16); border-radius: 16px; padding: 26px 16px; }
.stat b { display: block; font-family: var(--mono); font-size: 40px; font-weight: 800; color: #fff; line-height: 1; }
.stat span { display: block; font-size: 13px; color: rgba(255, 255, 255, .82); margin-top: 10px; }

/* ---------- bento 功能网格 ---------- */
.bento { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.bento-cell {
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--r);
  padding: 28px; position: relative; overflow: hidden;
  transition: transform .18s ease, border-color .18s ease, box-shadow .18s ease;
}
.bento-cell::before { content: ""; position: absolute; inset: 0; opacity: 0; transition: opacity .2s ease; background: linear-gradient(135deg, rgba(30, 64, 175, .07), transparent 55%); }
.bento-cell:hover { transform: translateY(-4px); border-color: rgba(30, 64, 175, .4); box-shadow: 0 24px 50px -30px rgba(22, 32, 58, .3); }
.bento-cell:hover::before { opacity: 1; }
.bento-cell.big { grid-column: span 2; }
.bento-cell .cell-ico { width: 54px; height: 54px; border-radius: 14px; background: rgba(30, 64, 175, .1); color: var(--navy); display: flex; align-items: center; justify-content: center; margin-bottom: 16px; }
.bento-cell .cell-ico svg { width: 26px; height: 26px; }
.bento-cell .cell-h { font-size: 20px; font-weight: 800; margin-bottom: 8px; }
.bento-cell .cell-p { color: var(--muted); font-size: 14px; position: relative; }
.bento-cell .glow { position: absolute; right: -50px; top: -50px; width: 160px; height: 160px; border-radius: 50%; background: radial-gradient(circle, rgba(14, 165, 233, .16), transparent 70%); }

/* ---------- 场景故事 ---------- */
.scene-grid { display: grid; grid-template-columns: 1fr 1fr; align-items: stretch; background: var(--panel); border: 1px solid var(--line); border-radius: 22px; overflow: hidden; }
.scene-grid.rev .scene-txt { order: 2; }
.scene-txt { padding: 44px 42px; }
.scene-txt .scene-num { font-family: var(--mono); font-size: 64px; font-weight: 800; color: transparent; -webkit-text-stroke: 1px rgba(30, 64, 175, .4); line-height: 1; }
.scene-txt .scene-tag { display: inline-block; font-family: var(--mono); font-size: 12px; letter-spacing: 2px; color: var(--navy); margin: 18px 0 8px; }
.scene-txt h3 { font-size: 30px; font-weight: 800; letter-spacing: -.5px; margin-bottom: 12px; }
.scene-txt p { color: var(--muted); }
.scene-txt .scene-p { margin-top: 16px; padding: 14px 18px; background: rgba(30, 64, 175, .06); border-left: 3px solid var(--cyan); border-radius: 0 12px 12px 0; }
.scene-p .src { font-size: 15px; color: var(--ink); }
.scene-p .dst { font-size: 13px; color: var(--cyan); margin-top: 4px; }
.scene-visual { position: relative; min-height: 280px; }
.scene-visual img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }

/* ---------- 平台卡 ---------- */
.platforms { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.pcard { background: var(--panel); border: 1px solid var(--line); border-radius: var(--r); overflow: hidden; transition: transform .18s ease, box-shadow .18s ease; }
.pcard:hover { transform: translateY(-4px); box-shadow: 0 24px 50px -30px rgba(22, 32, 58, .3); }
.pcard-top { height: 6px; background: linear-gradient(90deg, var(--navy), var(--cyan)); }
.pcard-body { padding: 26px 24px; text-align: center; }
.pcard-ico { width: 56px; height: 56px; margin: 0 auto 12px; border-radius: 14px; background: rgba(30, 64, 175, .1); color: var(--navy); display: flex; align-items: center; justify-content: center; }
.pcard-ico svg { width: 28px; height: 28px; }
.pcard-os { font-weight: 800; font-size: 17px; }
.pcard-sub { font-family: var(--mono); font-size: 12px; color: var(--muted); margin: 6px 0 18px; }

/* ---------- CTA 带(深蓝渐变 + 声波) ---------- */
.cta-band { position: relative; overflow: hidden; border-radius: 26px; padding: 64px 40px; text-align: center; color: #fff; background: linear-gradient(135deg, var(--navy), var(--navy-2) 55%, #122a6b); border: 1px solid var(--line-2); }
.cta-band::before { content: ""; position: absolute; inset: 0; opacity: .16; pointer-events: none; background-image: radial-gradient(rgba(255, 255, 255, .55) 1px, transparent 1px); background-size: 24px 24px; }
.cta-band h2 { font-size: 30px; font-weight: 900; margin-bottom: 10px; position: relative; z-index: 1; }
.cta-band p { opacity: .92; margin-bottom: 26px; font-size: 15.5px; position: relative; z-index: 1; }
.cta-band .btn { position: relative; z-index: 1; }

/* ---------- FAQ ---------- */
.faq-group { display: flex; flex-direction: column; gap: 12px; }
.faq-group details { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 0 20px; }
.faq-group summary { cursor: pointer; font-weight: 700; padding: 16px 0; list-style: none; display: flex; justify-content: space-between; align-items: center; }
.faq-group summary::after { content: "+"; font-size: 22px; color: var(--navy); font-weight: 400; }
.faq-group details[open] summary::after { content: "−"; }
.faq-a { color: var(--muted); padding: 0 0 16px; font-size: 14px; }

/* ---------- 内页头(渐变 + 声波) ---------- */
.pagehead { position: relative; overflow: hidden; padding: 88px 0 42px; text-align: center; border-bottom: 1px solid var(--line); }
.pagehead::before { content: ""; position: absolute; inset: 0; background: radial-gradient(ellipse at 50% -10%, rgba(14, 165, 233, .16), transparent 60%), var(--bg-2); }
.pagehead::after { content: ""; position: absolute; inset: 0; opacity: .4; pointer-events: none; background-image: linear-gradient(rgba(30, 64, 175, .05) 1px, transparent 1px), linear-gradient(90deg, rgba(30, 64, 175, .05) 1px, transparent 1px); background-size: 44px 44px; -webkit-mask-image: radial-gradient(ellipse at 50% 0%, #000 20%, transparent 75%); mask-image: radial-gradient(ellipse at 50% 0%, #000 20%, transparent 75%); }
.pagehead .wrap { position: relative; z-index: 2; }
.pagehead h1 { font-size: 42px; font-weight: 900; letter-spacing: -1px; margin: 18px 0 14px; color: var(--ink); }
.pagehead h1 em { font-style: normal; background: linear-gradient(120deg, var(--navy), var(--cyan)); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.lede { max-width: 680px; margin: 0 auto; color: var(--muted); font-size: 16px; }
.head-cta { display: flex; gap: 12px; justify-content: center; margin: 28px 0 10px; flex-wrap: wrap; }

.breadcrumb { font-family: var(--mono); font-size: 13px; color: var(--muted); }
.breadcrumb a { color: var(--navy); }
.breadcrumb .sep { margin: 0 8px; color: var(--line-2); }

/* ---------- 左右图文 ---------- */
.duo { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.duo-txt .t { display: inline-block; font-family: var(--mono); font-size: 12px; letter-spacing: 2px; color: var(--navy); margin-bottom: 10px; }
.duo-txt h2 { font-size: 28px; font-weight: 800; margin-bottom: 14px; }
.duo-txt p { color: var(--muted); }
.duo-img img { border-radius: var(--r); border: 1px solid var(--line-2); }

/* ---------- 时间线 ---------- */
.timeline { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.tl { background: var(--panel); border: 1px solid var(--line); border-radius: var(--r); padding: 24px; position: relative; }
.tl-num { font-family: var(--mono); font-size: 30px; font-weight: 800; color: var(--navy); opacity: .9; }
.tl h4 { font-size: 17px; font-weight: 800; margin: 10px 0 6px; }
.tl p { color: var(--muted); font-size: 13px; }

/* ---------- 表格 / 提示 ---------- */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--r); background: var(--panel); }
.table-wrap table { width: 100%; border-collapse: collapse; min-width: 480px; }
.table-wrap th, .table-wrap td { padding: 14px 18px; text-align: left; font-size: 14px; }
.table-wrap thead th { background: rgba(30, 64, 175, .06); color: var(--navy); font-family: var(--mono); font-size: 12px; letter-spacing: 1px; }
.table-wrap tbody tr { border-top: 1px solid var(--line); }
.table-wrap tbody td:first-child { color: var(--ink); font-weight: 700; white-space: nowrap; }
.table-wrap tbody td:last-child { color: var(--muted); }
.tip, .callout { display: flex; gap: 12px; padding: 16px 18px; border-radius: 12px; font-size: 14px; }
.tip { background: rgba(30, 64, 175, .07); border: 1px solid rgba(30, 64, 175, .2); }
.callout { background: rgba(245, 158, 11, .08); border: 1px solid rgba(245, 158, 11, .28); }
.tip .e, .callout .e { font-size: 18px; flex-shrink: 0; }
.tip p, .callout p { color: var(--ink-2); }

/* ---------- 文章页 ---------- */
.article-head { position: relative; overflow: hidden; padding: 76px 0 12px; border-bottom: 1px solid var(--line); }
.article-head::before { content: ""; position: absolute; inset: 0; background: radial-gradient(ellipse at 50% -10%, rgba(14, 165, 233, .15), transparent 60%), var(--bg-2); }
.article-head .wrap { position: relative; z-index: 2; }
.article-head h1 { font-size: 40px; font-weight: 900; letter-spacing: -1px; margin: 18px 0 16px; max-width: 820px; color: var(--ink); }
.article-head .meta { display: flex; gap: 22px; flex-wrap: wrap; font-size: 13px; color: var(--muted); margin-top: 14px; }
.article-head .meta b { color: var(--ink-2); font-weight: 600; }
.article-body { padding: 44px 0 60px; }
.article-cols { display: grid; grid-template-columns: 260px minmax(0, 1fr); gap: 48px; align-items: start; }
.toc { position: sticky; top: 90px; background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: 20px; }
.toc h5 { font-family: var(--mono); font-size: 11px; letter-spacing: 2px; color: var(--muted); margin-bottom: 14px; }
.toc ol { display: flex; flex-direction: column; gap: 10px; }
.toc li { display: flex; gap: 10px; font-size: 14px; }
.toc .num { font-family: var(--mono); color: var(--navy); }
.toc a { color: var(--ink-2); }
.toc a:hover { color: var(--navy); }
.prose { max-width: 720px; color: var(--ink-2); }
.prose h2 { font-size: 26px; font-weight: 800; color: var(--ink); margin: 40px 0 16px; padding-top: 8px; }
.prose h3 { font-size: 19px; font-weight: 800; color: var(--ink); margin: 28px 0 12px; }
.prose p { margin: 0 0 16px; }
.prose a { color: var(--navy); border-bottom: 1px solid var(--navy); }
.prose ul, .prose ol { margin: 0 0 16px 22px; }
.prose ul li { list-style: disc; margin: 6px 0; }
.prose ol li { list-style: decimal; margin: 6px 0; }
.prose img { border-radius: 12px; border: 1px solid var(--line-2); margin: 8px 0; }
.prose figure { margin: 20px 0; }
.prose figcaption { font-size: 12px; color: var(--muted); text-align: center; margin-top: 8px; }
.prose blockquote { border-left: 3px solid var(--cyan); background: var(--panel); padding: 14px 18px; border-radius: 0 12px 12px 0; color: var(--ink); margin: 18px 0; }

/* 相关阅读 */
.related { margin-top: 20px; }
.related .sec-h { margin-bottom: 24px; }
.rel-list { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.rel-item { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; transition: border-color .15s ease; }
.rel-item:hover { border-color: rgba(30, 64, 175, .5); }
.rel-item a { padding: 18px; display: flex; flex-direction: column; gap: 8px; }
.rel-item .tag { font-family: var(--mono); font-size: 11px; color: var(--navy); }
.rel-item h4 { font-size: 15px; font-weight: 700; color: var(--ink); }
.rel-item .go { color: var(--muted); font-size: 20px; align-self: flex-end; }

/* 分享 */
.share { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-top: 40px; padding-top: 22px; border-top: 1px solid var(--line); }
.share-lbl { font-family: var(--mono); font-size: 12px; color: var(--muted); margin-right: 4px; }
.share a { font-size: 13px; color: var(--ink-2); border: 1px solid var(--line); border-radius: 9px; padding: 6px 12px; }
.share a:hover { color: var(--navy); border-color: var(--navy); }

/* ---------- 工具页 ---------- */
.search-box { display: flex; gap: 10px; justify-content: center; margin: 24px 0; }
.search-box input { width: min(440px, 70vw); background: var(--panel); border: 1px solid var(--line-2); border-radius: 12px; color: var(--ink); padding: 14px 18px; font-size: 15px; outline: none; }
.search-box input:focus { border-color: var(--navy); }
.sitemap-list { display: flex; flex-direction: column; gap: 6px; }
.sitemap-list .grp { font-family: var(--mono); font-size: 12px; letter-spacing: 2px; color: var(--navy); margin: 18px 0 4px; }
.sitemap-list li a { color: var(--ink-2); font-size: 15px; }
.sitemap-list li a:hover { color: var(--navy); }

/* ---------- 页脚(深蓝) ---------- */
.foot { background: #0f1f3d; color: #c4d0e6; padding: 64px 0 0; border-top: 1px solid rgba(255, 255, 255, .08); }
.foot-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr; gap: 40px; padding-bottom: 40px; }
.foot-brand .brand { margin-bottom: 14px; }
.foot-brand .brand-name { color: #fff; }
.foot-brand p { color: #93a5c8; font-size: 14px; max-width: 320px; }
.foot-col h4 { font-family: var(--mono); font-size: 12px; letter-spacing: 2px; color: rgba(196, 208, 230, .55); margin-bottom: 16px; }
.foot-links { display: flex; flex-direction: column; gap: 10px; }
.foot-links a { color: #c4d0e6; font-size: 14px; }
.foot-links a:hover { color: #7dd3fc; }
.foot-note { border-top: 1px solid rgba(255, 255, 255, .08); padding: 20px 0; text-align: center; color: #93a5c8; font-size: 13px; }

/* ---------- 返回顶部 ---------- */
.backtop { position: fixed; right: 22px; bottom: 22px; width: 44px; height: 44px; border-radius: 12px; background: var(--panel-2); border: 1px solid var(--line-2); color: var(--navy); font-size: 20px; cursor: pointer; opacity: 0; pointer-events: none; transition: opacity .2s; box-shadow: 0 10px 24px -12px rgba(22, 32, 58, .4); }
.backtop.show { opacity: 1; pointer-events: auto; }

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  .nav-toggle { display: block; }
  .nav-wrap { position: absolute; top: 66px; left: 0; right: 0; background: #fff; flex-direction: column; align-items: stretch; padding: 12px; border-bottom: 1px solid var(--line); display: none; }
  .nav-wrap.open { display: flex; }
  .dd { width: 100%; }
  .dd > button { width: 100%; text-align: left; }
  .dd-menu { position: static; opacity: 1; visibility: visible; transform: none; box-shadow: none; border: none; background: transparent; padding: 2px 0 2px 14px; min-width: 0; }
  .hero { padding: 56px 0 72px; }
  .hero-h1 { font-size: 46px; }
  .interp-row { grid-template-columns: 1fr; }
  .interp-mid { transform: rotate(90deg); }
  .bento { grid-template-columns: 1fr 1fr; }
  .bento-cell.big { grid-column: span 2; }
  .scene-grid, .duo, .foot-grid, .article-cols { grid-template-columns: 1fr; }
  .scene-grid.rev .scene-txt { order: 0; }
  .scene-visual { min-height: 200px; }
  .platforms { grid-template-columns: 1fr 1fr; }
  .timeline { grid-template-columns: 1fr; }
  .rel-list { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .toc { position: static; }
}
@media (max-width: 560px) {
  .hero-h1 { font-size: 36px; }
  .bento { grid-template-columns: 1fr; }
  .bento-cell.big { grid-column: span 1; }
  .platforms { grid-template-columns: 1fr; }
  .top-cta { display: none; }
  .stats-grid { grid-template-columns: 1fr; }
}