/* Tomoru 官网：夜灯（Night Lantern）。颜色取自 app/internal/ui/kit/tokens.go（docs/design-system.md）。 */

:root {
  --night: #1b1949;
  --night-line: #2c2970;
  --night-text: #d3cff6;
  --night-title: #fbf3e2;
  --stage: #15133d;
  --sky-top: #13123a;
  --sky-bottom: #33215c;
  --paper: #fbf6ec;
  --card: #ffffff;
  --sand: #f4ead6;
  --fill: #f1e5cb;
  --line: #efe4cc;
  --line-strong: #e6d8bb;
  --ink: #232057;
  --ink-muted: #6b6590;
  --lantern: #f5a524;
  --lantern-ink: #232057;
  --lantern-tint: #fff0d1;
  --lantern-text: #8a5200;
  --sub-src: #f4f2ff;
  --sub-tgt: #f5a524;
  --edge: #1e2259;

  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", "Noto Sans CJK SC", "Segoe UI", system-ui, sans-serif;
  --round: ui-rounded, "SF Pro Rounded", "Hiragino Maru Gothic ProN", "Arial Rounded MT Bold", var(--sans);
  --spring: cubic-bezier(.3, 1.25, .5, 1);
  --wrap: 1160px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font: 400 16px/1.7 var(--sans);
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  font-variant-numeric: tabular-nums;
}
:lang(ja) { font-family: -apple-system, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic UI", "Meiryo", "Noto Sans CJK JP", sans-serif; }
:lang(ko) { font-family: -apple-system, "Apple SD Gothic Neo", "Malgun Gothic", "Noto Sans CJK KR", sans-serif; }
img, svg { display: block; max-width: 100%; }
img { height: auto; }
a { color: inherit; }
h1, h2, h3, p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
kbd {
  font: 600 .9em var(--sans);
  padding: 1px 7px;
  border: 1px solid var(--line-strong);
  border-bottom-width: 2px;
  border-radius: 6px;
  background: var(--card);
  white-space: nowrap;
}
.icon { width: 18px; height: 18px; flex: none; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

.wrap { width: min(var(--wrap), 100% - 48px); margin-inline: auto; }
.wrap.narrow { --wrap: 760px; }
.skip { position: absolute; left: -999px; top: 8px; z-index: 100; padding: 8px 14px; border-radius: 999px; background: var(--lantern); color: var(--lantern-ink); }
.skip:focus { left: 12px; }
:focus-visible { outline: 2px solid var(--lantern); outline-offset: 3px; border-radius: 6px; }

/* ---------- 品牌字 ---------- */
.wordmark {
  display: block;
  font: 800 1em/1 var(--round);
  letter-spacing: -.02em;
  /* 和 banner 一样：上半奶白，下半琥珀 */
  background: linear-gradient(180deg, var(--night-title) 0 58%, var(--lantern) 58% 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  padding-bottom: .06em;
}
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; }
.brand img { border-radius: 8px; }
.brand-word { font: 800 20px/1 var(--round); color: var(--night-title); letter-spacing: -.01em; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  border-radius: 999px; text-decoration: none; font-weight: 800; line-height: 1.2;
  transition: transform .2s var(--spring), box-shadow .2s, background-color .2s;
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }
.btn-primary { background: var(--lantern); color: var(--lantern-ink); box-shadow: 0 8px 24px rgb(245 165 36 / .45); }
.btn-primary:hover { background: #ffb43a; box-shadow: 0 12px 30px rgb(245 165 36 / .55); }
.btn-glass { background: rgb(255 255 255 / .08); color: var(--night-title); border: 1px solid rgb(255 255 255 / .14); }
.btn-glass:hover { background: rgb(255 255 255 / .14); }
.btn-sm { padding: 8px 18px; font-size: 14px; box-shadow: 0 4px 14px rgb(245 165 36 / .35); }
.btn-lg { padding: 14px 28px 14px 24px; font-size: 17px; min-height: 58px; }
.btn-lg .icon { width: 20px; height: 20px; }
.btn small { display: block; font-size: 12px; font-weight: 600; opacity: .72; margin-top: 2px; }
.cta-row { display: flex; flex-wrap: wrap; gap: 14px; }
.cta-row.center { justify-content: center; }

/* ---------- 顶栏 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgb(27 25 73 / .82);
  -webkit-backdrop-filter: saturate(1.4) blur(14px);
  backdrop-filter: saturate(1.4) blur(14px);
  border-bottom: 1px solid rgb(255 255 255 / .06);
}
.header-row { height: 64px; display: flex; align-items: center; gap: 28px; }
.nav { display: flex; gap: 26px; margin-left: 12px; }
.nav a, .icon-link { color: var(--night-text); text-decoration: none; font-size: 15px; font-weight: 600; transition: color .2s; }
.nav a:hover, .icon-link:hover { color: var(--night-title); }
.header-actions { margin-left: auto; display: flex; align-items: center; gap: 16px; }
.icon-link .icon { width: 22px; height: 22px; }

/* ---------- 夜空 ---------- */
.night { position: relative; background: var(--night); color: var(--night-text); overflow: hidden; isolation: isolate; }
.night h2, .night h3 { color: var(--night-title); }
.sky {
  position: absolute; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(1.4px 1.4px at 8% 14%, #fff, transparent),
    radial-gradient(1px 1px at 22% 42%, rgb(255 255 255 / .7), transparent),
    radial-gradient(1.2px 1.2px at 36% 9%, rgb(255 255 255 / .8), transparent),
    radial-gradient(1px 1px at 47% 31%, rgb(255 255 255 / .5), transparent),
    radial-gradient(1.4px 1.4px at 61% 12%, #fff, transparent),
    radial-gradient(1px 1px at 72% 38%, rgb(255 255 255 / .6), transparent),
    radial-gradient(1.2px 1.2px at 84% 20%, rgb(255 255 255 / .8), transparent),
    radial-gradient(1px 1px at 93% 46%, rgb(255 255 255 / .5), transparent),
    radial-gradient(1px 1px at 15% 70%, rgb(255 255 255 / .4), transparent),
    radial-gradient(1px 1px at 55% 62%, rgb(255 255 255 / .35), transparent),
    radial-gradient(ellipse 55% 38% at 50% 112%, rgb(245 165 36 / .30), transparent 72%),
    linear-gradient(180deg, var(--sky-top), var(--sky-bottom));
}

/* ---------- 版块 ---------- */
.section { padding: clamp(72px, 10vw, 128px) 0; }
.paper { background: var(--paper); }
.paper-2 { background: linear-gradient(180deg, var(--paper), #f8efdd); }
.sand { background: var(--sand); }
.section-head { max-width: 720px; margin: 0 auto clamp(40px, 6vw, 64px); text-align: center; }
.section-head.left { margin-left: 0; text-align: left; margin-bottom: 32px; }
.eyebrow { font-size: 14px; font-weight: 800; letter-spacing: .08em; color: var(--lantern-text); margin-bottom: 12px; }
.night .eyebrow { color: var(--lantern); }
h1, h2, h3 { text-wrap: balance; }
h2 { font-size: clamp(30px, 4.2vw, 44px); line-height: 1.25; font-weight: 800; letter-spacing: -.01em; }
.section-lead { margin-top: 16px; font-size: 18px; color: var(--ink-muted); }
.on-night .section-lead { color: var(--night-text); }

/* ---------- ① 首屏 ---------- */
.hero { padding: clamp(56px, 8vw, 104px) 0 clamp(80px, 10vw, 128px); }
.hero-grid { display: grid; grid-template-columns: 1fr 1.08fr; gap: clamp(32px, 5vw, 72px); align-items: center; }
.hero h1 { font-size: clamp(64px, 9vw, 112px); }
.hero .claim, .callback .claim {
  display: block; margin-top: 18px;
  font-size: clamp(30px, 4vw, 46px); line-height: 1.2; font-weight: 800; color: var(--night-title); letter-spacing: .01em;
}
.lead { margin-top: 22px; max-width: 34em; font-size: 18px; line-height: 1.75; color: var(--night-text); }
.hero .cta-row { margin-top: 34px; }
.facts { display: flex; flex-wrap: wrap; gap: 8px 22px; margin-top: 26px; font-size: 14px; color: var(--night-text); }
.facts li { display: flex; align-items: center; gap: 8px; }
.facts li::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--lantern); box-shadow: 0 0 8px var(--lantern); }

.hero-visual { position: relative; padding: 0 0 56px; }
.screen {
  position: relative; border-radius: 18px; overflow: hidden;
  background: var(--stage);
  border: 1px solid rgb(255 255 255 / .12);
  box-shadow: 0 30px 80px rgb(5 4 25 / .55), 0 0 0 6px rgb(255 255 255 / .03);
}
.screen-bar { display: flex; align-items: center; gap: 7px; height: 36px; padding: 0 14px; background: #211f55; font-size: 12px; }
.screen-bar i { width: 10px; height: 10px; border-radius: 50%; background: #ff5f57; }
.screen-bar i:nth-child(2) { background: #febc2e; }
.screen-bar i:nth-child(3) { background: #28c840; }
.screen-title { margin: 0 auto; color: var(--night-text); }
.live { padding: 1px 7px; border-radius: 4px; background: #e0564a; color: #fff; font-weight: 800; font-size: 10px; letter-spacing: .06em; }
.screen-scene { width: 100%; aspect-ratio: 560 / 330; }
.listening {
  position: absolute; top: 50px; right: 14px;
  display: flex; align-items: center; gap: 8px;
  padding: 6px 12px; border-radius: 999px; font-size: 12px; font-weight: 600;
  background: rgb(255 255 255 / .08); border: 1px solid rgb(255 255 255 / .14); color: var(--night-title);
  -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px);
}
.levels { display: inline-flex; align-items: center; gap: 2px; height: 14px; }
.levels i { width: 3px; height: 100%; border-radius: 2px; background: var(--lantern); transform-origin: center; animation: lv .8s ease-in-out infinite alternate; }
.levels i:nth-child(2) { animation-delay: -.3s; }
.levels i:nth-child(3) { animation-delay: -.55s; }
.levels i:nth-child(4) { animation-delay: -.15s; }
.levels i:nth-child(5) { animation-delay: -.7s; }
@keyframes lv { from { transform: scaleY(.3); } to { transform: scaleY(1); } }

/* 浮在屏幕上的字幕：跨出窗口下沿，表示它在所有窗口之上 */
.overlay { position: absolute; left: 5%; right: 30%; bottom: 0; }
.roll {
  height: 168px; display: flex; flex-direction: column; justify-content: flex-end; align-items: flex-start; gap: 8px; overflow: hidden;
  -webkit-mask-image: linear-gradient(180deg, transparent 0, #000 22%);
  mask-image: linear-gradient(180deg, transparent 0, #000 22%);
}
.line {
  max-width: 100%; padding: 7px 14px 8px; border-radius: 8px;
  background: rgb(8 7 28 / .8);
  transition: opacity .46s;
}
.line.old { opacity: .55; }
.src, .tgt { text-shadow: 0 0 2px var(--edge), 0 0 2px var(--edge), 0 1px 3px rgb(0 0 0 / .45); }
.line .src { font-size: 15px; line-height: 1.45; font-weight: 600; color: var(--sub-src); }
.line .tgt { font-size: clamp(17px, 1.7vw, 21px); line-height: 1.4; font-weight: 800; color: var(--sub-tgt); }
.line .draft { opacity: .7; }
.hero-mascot {
  position: absolute; right: -3%; bottom: -14px; width: 40%; max-width: 280px;
  filter: drop-shadow(0 18px 30px rgb(5 4 25 / .5));
  animation: bob 6s ease-in-out infinite;
}
@keyframes bob { 50% { transform: translateY(-8px); } }

/* ---------- ② 卖点 ---------- */
.pillars { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.pillar { background: var(--card); border: 1px solid var(--line); border-radius: 20px; padding: 14px 14px 26px; }
.pillar .art { border-radius: 14px; width: 100%; }
.pillar h3 { margin: 22px 10px 8px; font-size: 20px; font-weight: 800; }
.pillar p { margin: 0 10px; color: var(--ink-muted); font-size: 15px; }

/* ---------- SVG 动画通用 ---------- */
.art { font-family: var(--sans); }
.art text { font-family: inherit; }
.t-mini { font-size: 10px; fill: var(--night-text); }
.t-label { font-size: 12px; font-weight: 600; fill: var(--night-text); }
.t-cap { font-size: 12px; fill: var(--night-text); }
.t-note { font-size: 11px; fill: var(--night-text); fill-opacity: .7; }
.t-src { font-size: 12.5px; font-weight: 600; fill: var(--sub-src); }
.t-tgt { font-size: 14px; font-weight: 800; fill: var(--sub-tgt); }
.t-src.big { font-size: 17px; }
.t-tgt.big { font-size: 20px; }
.t-name { font-size: 13px; font-weight: 800; fill: #ffd27a; }
.lit { fill: var(--lantern); }
.dash { fill: none; stroke: var(--lantern); stroke-width: 2; stroke-dasharray: 4 7; stroke-linecap: round; animation: dash .9s linear infinite; }
.dash.rev { animation-direction: reverse; }
@keyframes dash { to { stroke-dashoffset: -11; } }
.lv rect { fill: var(--lantern); transform-box: fill-box; transform-origin: center; animation: lv .9s ease-in-out infinite alternate; }
.lv rect:nth-child(2) { animation-delay: -.35s; }
.lv rect:nth-child(3) { animation-delay: -.6s; }
.lv rect:nth-child(4) { animation-delay: -.15s; }
.frame { fill: none; stroke: var(--lantern); stroke-width: 2; }
.seg { font-size: 12px; font-weight: 700; }
.cloud { fill: var(--night-text); }

/* 两个状态轮流：A 0–44%，B 50–94%（8 秒一轮）。不动时（减少动态效果）停在静态样式上。 */
@keyframes phA { 0%, 44% { opacity: 1; } 50%, 94% { opacity: 0; } 100% { opacity: 1; } }
@keyframes phB { 0%, 44% { opacity: 0; } 50%, 94% { opacity: 1; } 100% { opacity: 0; } }
@keyframes phDim { 0%, 44% { opacity: 1; } 50%, 94% { opacity: .28; } 100% { opacity: 1; } }
@keyframes knob { 0%, 44% { transform: translateX(0); } 50%, 94% { transform: translateX(var(--kx)); } 100% { transform: translateX(0); } }
@keyframes segOn { 0%, 44% { fill: var(--lantern-ink); } 50%, 94% { fill: var(--night-text); } 100% { fill: var(--lantern-ink); } }
@keyframes segOff { 0%, 44% { fill: var(--night-text); } 50%, 94% { fill: var(--lantern-ink); } 100% { fill: var(--night-text); } }
.ph-a { animation: phA 8s infinite; }
.ph-b { opacity: 0; animation: phB 8s infinite; }
.ph-dim { animation: phDim 8s infinite; }
.knob { --kx: 72px; animation: knob 8s var(--spring) infinite; }
.seg-a { fill: var(--lantern-ink); animation: segOn 8s infinite; }
.seg-b { fill: var(--night-text); animation: segOff 8s infinite; }

/* 卖点 1：同一条字幕浮在三种窗口上 */
@keyframes cyc { 0% { opacity: 0; } 3%, 30% { opacity: 1; } 34%, 100% { opacity: 0; } }
.cyc { opacity: 0; animation: cyc 9s infinite both; }
.cyc.c1 { opacity: 1; }
.cyc.c2 { animation-delay: -6s; }
.cyc.c3 { animation-delay: -3s; }

/* 卖点 2：全部声音 / 只听一个应用 */
.flow .dash.ph-off { animation: dash .9s linear infinite, phB-off 8s infinite; }
@keyframes phB-off { 0%, 44% { opacity: 1; } 50%, 94% { opacity: .06; } 100% { opacity: 1; } }

/* 卖点 3：本机 / 云端 */
.ring { transform-box: fill-box; transform-origin: center; animation: spin 8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.ph-local { animation: phDim 8s infinite; }
.ph-cloud { opacity: 0; animation: phB 8s infinite; }
.cloud { opacity: .25; animation: cloudLit 8s infinite; }
@keyframes cloudLit { 0%, 44% { opacity: .25; fill: var(--night-text); } 50%, 94% { opacity: 1; fill: var(--lantern-tint); } 100% { opacity: .25; } }

/* ---------- ③ 工作原理 ---------- */
.stage-section .section-lead { max-width: 640px; margin-inline: auto; }
.pipeline { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; counter-reset: step; }
.step {
  position: relative; padding: 26px 24px 28px; border-radius: 20px;
  background: rgb(255 255 255 / .06); border: 1px solid rgb(255 255 255 / .12);
}
.step:not(:last-child)::after {
  content: ""; position: absolute; top: 72px; right: -24px; width: 20px; height: 2px;
  background: repeating-linear-gradient(90deg, var(--lantern) 0 4px, transparent 4px 9px);
  background-size: 18px 2px; animation: flowX .9s linear infinite;
}
@keyframes flowX { to { background-position: 18px 0; } }
.step-no {
  position: absolute; top: 18px; right: 20px;
  width: 26px; height: 26px; border-radius: 50%; display: grid; place-items: center;
  font-size: 13px; font-weight: 800; color: var(--lantern-ink); background: var(--lantern);
}
.step-art, .step-sub { height: 92px; margin-bottom: 18px; }
.step-art { width: 100%; }
.wave rect { fill: var(--lantern); transform-box: fill-box; transform-origin: center; animation: lv .7s ease-in-out infinite alternate; }
.wave rect:nth-child(3n) { animation-delay: -.25s; }
.wave rect:nth-child(3n+1) { animation-delay: -.5s; }
.wave rect:nth-child(4n) { animation-duration: .9s; }
.step-sub { display: flex; flex-direction: column; justify-content: center; align-items: flex-start; gap: 2px; }
.step-sub .src { font-size: 17px; font-weight: 600; color: var(--sub-src); }
.step-sub .src.dim { opacity: .55; font-size: 15px; }
.step-sub .tgt { font-size: 24px; font-weight: 800; color: var(--sub-tgt); }
.step h3 { font-size: 28px; }
.step p { margin-top: 6px; font-size: 15px; }
.typing { animation: typing 6s steps(10, end) infinite; }
@keyframes typing { 0%, 8% { clip-path: inset(0 100% 0 0); } 40%, 100% { clip-path: inset(0 0 0 0); } }
.appear { animation: appear 6s infinite; }
@keyframes appear {
  0%, 46% { opacity: 0; filter: blur(4px); transform: translateY(6px); }
  56%, 92% { opacity: 1; filter: none; transform: none; }
  100% { opacity: 0; }
}

/* ---------- ④ 功能细节 ---------- */
.feature { display: grid; grid-template-columns: 1fr 1.1fr; gap: clamp(32px, 6vw, 88px); align-items: center; }
.feature + .feature { margin-top: clamp(64px, 9vw, 112px); }
.feature.flip .feature-copy { order: 2; }
.feature .art { border-radius: 20px; box-shadow: 0 24px 60px rgb(27 25 73 / .22); width: 100%; }
.feature h3 { font-size: clamp(26px, 3vw, 34px); line-height: 1.3; font-weight: 800; margin: 16px 0 14px; }
.feature p { color: var(--ink-muted); font-size: 17px; }
.tag {
  display: inline-flex; align-items: center; gap: 8px; padding: 6px 14px; border-radius: 999px;
  background: var(--lantern-tint); color: var(--lantern-text); font-size: 14px; font-weight: 800;
}
.tag .icon { width: 16px; height: 16px; }

/* 抢先翻译：声音一段段亮起，原文分块出现，先大意后完整 */
.wv-bars use.dim { fill: var(--night-text); fill-opacity: .25; }
.wv-bars use.lit { fill: var(--lantern); }
.sweep { transform-box: fill-box; transform-origin: left center; animation: sweep 8s infinite; }
@keyframes sweep { 0% { transform: scaleX(0); animation-timing-function: linear; } 60%, 94% { transform: scaleX(1); } 100% { transform: scaleX(0); } }
.playhead { animation: playhead 8s infinite; }
@keyframes playhead {
  0% { transform: translateX(0); opacity: 1; animation-timing-function: linear; }
  60% { transform: translateX(366px); opacity: 1; }
  66%, 100% { transform: translateX(366px); opacity: 0; }
}
.rec { animation: pulse 1.2s ease-in-out infinite; }
@keyframes pulse { 50% { opacity: .35; } }
.ph-talk { opacity: 0; animation: talk 8s infinite; }
.ph-done { animation: done 8s infinite; }
@keyframes talk { 0%, 58% { opacity: 1; } 62%, 100% { opacity: 0; } }
@keyframes done { 0%, 58% { opacity: 0; } 62%, 94% { opacity: 1; } 100% { opacity: 0; } }
.ck { animation: 8s infinite; }
.ck1 { animation-name: ck1; }
.ck2 { animation-name: ck2; }
.ck3 { animation-name: ck3; }
@keyframes ck1 { 0%, 5% { fill-opacity: 0; } 9%, 94% { fill-opacity: 1; } 100% { fill-opacity: 0; } }
@keyframes ck2 { 0%, 24% { fill-opacity: 0; } 28%, 94% { fill-opacity: 1; } 100% { fill-opacity: 0; } }
@keyframes ck3 { 0%, 46% { fill-opacity: 0; } 50%, 94% { fill-opacity: 1; } 100% { fill-opacity: 0; } }
.ph-draft { opacity: 0; animation: draft 8s infinite; }
.ph-final { animation: final 8s infinite; }
@keyframes draft { 0%, 30% { opacity: 0; } 34%, 62% { opacity: .72; } 66%, 100% { opacity: 0; } }
@keyframes final { 0%, 63% { opacity: 0; } 67%, 94% { opacity: 1; } 100% { opacity: 0; } }

/* 场景：对照表把听错、直译的名字改对 */
.knob-wide { --kx: 140px; }
.bad { fill: #ff9c84; }
.good { fill: #8fe3b0; }

.gloss { animation: phLit 8s infinite; }
@keyframes phLit { 0%, 44% { opacity: .3; } 50%, 94% { opacity: 1; } 100% { opacity: .3; } }
/* 静态时停在「用了场景」 */
.feature .ph-a { opacity: 0; }
.feature .ph-b { opacity: 1; }
.feature .knob { transform: translateX(var(--kx)); }
.feature .seg-a { fill: var(--night-text); }
.feature .seg-b { fill: var(--lantern-ink); }

/* 框选翻译：按键 → 框选 → 出译文 */
.key rect { fill: var(--night-line); stroke: rgb(255 255 255 / .2); }
.key text { font-size: 15px; font-weight: 700; fill: var(--night-title); }
.key { transform-box: fill-box; animation: keyPress 8s infinite; }
.key rect { animation: keyFill 8s infinite; }
.k2, .k2 rect { animation-delay: .25s; }
.k3, .k3 rect { animation-delay: .5s; }
@keyframes keyPress { 0%, 3% { transform: none; } 5%, 14% { transform: translateY(2px); } 18%, 100% { transform: none; } }
@keyframes keyFill { 0%, 3% { fill: var(--night-line); } 5%, 14% { fill: var(--lantern); } 18%, 100% { fill: var(--night-line); } }
.keys { opacity: 0; animation: keys 8s infinite; }
@keyframes keys { 0%, 36% { opacity: 1; } 42%, 96% { opacity: 0; } 100% { opacity: 1; } }
.sel {
  fill: rgb(245 165 36 / .08); stroke: var(--lantern); stroke-width: 2; stroke-dasharray: 6 4; vector-effect: non-scaling-stroke;
  transform-box: view-box; transform-origin: 16px 140px; animation: sel 8s infinite;
}
@keyframes sel {
  0%, 18% { transform: scale(0); opacity: 1; }
  38%, 92% { transform: scale(1); opacity: 1; }
  97%, 100% { transform: scale(1); opacity: 0; }
}
.cross { opacity: 0; animation: cross 8s infinite; }
@keyframes cross {
  0%, 14% { opacity: 0; transform: translate(16px, 140px); }
  18% { opacity: 1; transform: translate(16px, 140px); }
  38% { opacity: 1; transform: translate(404px, 242px); }
  44%, 100% { opacity: 0; transform: translate(404px, 242px); }
}
.result { animation: result 8s infinite; }
@keyframes result {
  0%, 44% { opacity: 0; transform: translateY(10px); }
  50%, 92% { opacity: 1; transform: none; }
  97%, 100% { opacity: 0; transform: none; }
}

/* ---------- ⑤ 使用场景 ---------- */
.uses { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; }
.use { background: var(--card); border: 1px solid var(--line); border-radius: 20px; padding: 18px; display: flex; flex-direction: column; gap: 14px; }
.use h3 { font-size: 17px; font-weight: 800; padding-left: 4px; }
.sub-card {
  flex: 1; display: flex; flex-direction: column; justify-content: flex-end; gap: 2px;
  min-height: 112px; padding: 14px; border-radius: 14px;
  background:
    radial-gradient(ellipse 80% 60% at 50% 120%, rgb(245 165 36 / .25), transparent 70%),
    linear-gradient(180deg, var(--sky-top), var(--sky-bottom));
}
.sub-card .src { font-size: 13px; font-weight: 600; color: var(--sub-src); line-height: 1.45; }
.sub-card .tgt { font-size: 16px; font-weight: 800; color: var(--sub-tgt); line-height: 1.4; }

/* ---------- ⑥ 三步上手 ---------- */
.start-grid { display: grid; grid-template-columns: 1fr 1.15fr; gap: clamp(32px, 6vw, 80px); align-items: center; }
.steps { counter-reset: s; display: grid; gap: 26px; }
.steps li { counter-increment: s; position: relative; padding-left: 56px; }
.steps li::before {
  content: counter(s); position: absolute; left: 0; top: 0;
  width: 38px; height: 38px; border-radius: 50%; display: grid; place-items: center;
  font-weight: 800; color: var(--lantern-ink); background: var(--lantern); box-shadow: 0 6px 16px rgb(245 165 36 / .35);
}
.steps h3 { font-size: 20px; font-weight: 800; line-height: 38px; }
.steps p { color: var(--ink-muted); margin-top: 4px; }
.shot { margin: 0; }
.shot img { border-radius: 20px; border: 1px solid var(--line); box-shadow: 0 30px 70px rgb(27 25 73 / .2); }
.shot figcaption { margin-top: 14px; text-align: center; font-size: 14px; color: var(--ink-muted); }

/* ---------- ⑦ 隐私 ---------- */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 16px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 20px; padding: 24px; }
.card-icon { width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; background: var(--lantern-tint); color: var(--lantern-text); }
.card-icon .icon { width: 22px; height: 22px; }
.card h3 { margin: 18px 0 6px; font-size: 18px; font-weight: 800; }
.card p { color: var(--ink-muted); font-size: 15px; }

/* ---------- ⑧ 看板娘 ---------- */
.mascot-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: clamp(32px, 6vw, 80px); align-items: center; }
.mascot-art { position: relative; justify-self: center; width: min(340px, 80%); }
.mascot-art::before { content: ""; position: absolute; inset: 12% 6% 0; border-radius: 50%; background: radial-gradient(closest-side, rgb(245 165 36 / .35), transparent); filter: blur(20px); z-index: -1; }
.mascot-art img { animation: bob 6s ease-in-out infinite; }
.mascot-copy p:not(.eyebrow) { margin-top: 16px; font-size: 17px; }
.mascot-copy h2 { margin-bottom: 8px; }
.menubar { margin-top: 28px; max-width: 420px; }
.tray-idle { opacity: 0; animation: phA 8s infinite; }
.tray-on { animation: phB 8s infinite; }

/* ---------- ⑨ 常见问题 ---------- */
.faq details { border-bottom: 1px solid var(--line-strong); }
.faq summary {
  cursor: pointer; list-style: none; display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 22px 4px; font-size: 18px; font-weight: 700;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; flex: none; width: 30px; height: 30px; border-radius: 50%; display: grid; place-items: center; background: var(--fill); color: var(--lantern-text); font-weight: 800; transition: transform .46s var(--spring); }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { padding: 0 4px 24px; color: var(--ink-muted); }

/* ---------- ⑩ 收尾 ---------- */
.callback { text-align: center; padding-bottom: clamp(140px, 16vw, 200px); }
.callback-inner { position: relative; }
.callback h2 { font-size: clamp(56px, 8vw, 96px); }
.callback .lead { margin: 22px auto 0; }
.callback .cta-row { margin-top: 32px; }
.req { margin-top: 22px; font-size: 14px; opacity: .8; }
.peek { position: absolute; width: 200px; left: 50%; bottom: -96px; transform: translateX(-50%); filter: drop-shadow(0 -6px 24px rgb(245 165 36 / .25)); }

/* ---------- 页脚 ---------- */
.site-footer { background: #13123a; color: var(--night-text); padding: 64px 0 40px; font-size: 14px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: 32px; }
.footer-brand p { margin-top: 14px; max-width: 22em; }
.site-footer h2 { font-size: 13px; font-weight: 800; letter-spacing: .08em; color: var(--night-title); margin-bottom: 14px; }
.site-footer nav a { display: block; padding: 4px 0; text-decoration: none; opacity: .85; }
.site-footer nav a:hover { color: var(--night-title); opacity: 1; }
.footer-legal { margin-top: 48px; padding-top: 24px; border-top: 1px solid rgb(255 255 255 / .08); font-size: 13px; opacity: .75; }

/* ---------- 进场和暂停 ---------- */
html.js .rv { opacity: 0; transform: translateY(18px); transition: opacity .7s ease, transform .7s var(--spring); }
html.js .rv.in-view { opacity: 1; transform: none; }
/* 动画只在看得见时跑 */
html.js [data-anim]:not(.playing) * { animation-play-state: paused !important; }

/* ---------- 窄屏 ---------- */
@media (max-width: 960px) {
  .hero-grid, .feature, .start-grid, .mascot-grid { grid-template-columns: 1fr; }
  .feature.flip .feature-copy { order: 0; }
  .pillars, .pipeline { grid-template-columns: 1fr; max-width: 520px; margin-inline: auto; }
  .step:not(:last-child)::after { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
  .hero-visual { max-width: 620px; }
}
@media (max-width: 760px) {
  .nav { display: none; }
  .lead, .section-lead, .feature p { font-size: 16px; }
  .overlay { left: 4%; right: 4%; }
  .roll { height: 150px; }
  .hero-mascot { width: 92px; top: -46px; bottom: auto; right: 8px; }
  .hero-visual { margin-top: 40px; }
  .listening { top: 44px; left: 14px; right: auto; }
  .line .src { font-size: 13px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  html.js .rv { opacity: 1; transform: none; }
}