/* tiedan030 · 个人主页
 * 深色宇宙感:WebGL 极光底 + 深色玻璃卡 + 指针跟随边光 + 细颗粒。
 * 不引外部字体/脚本 —— 受众在国内,Google Fonts 与海外 CDN 不可靠。 */
:root {
  --bg: #07070a;
  --bg-2: #0d0d13;
  --line: rgba(255, 255, 255, 0.08);
  --line-2: rgba(255, 255, 255, 0.14);
  --text: #f2f1f6;
  --text-2: rgba(242, 241, 246, 0.68);
  --text-3: rgba(242, 241, 246, 0.42);
  --violet: #a78bfa;
  --violet-2: #8b7cf6;
  --sky: #7dd3fc;
  --amber: #f0a36b;
  --glass: linear-gradient(180deg, rgba(255, 255, 255, 0.055), rgba(255, 255, 255, 0.02));
  --radius: 28px;
  --sans: -apple-system, "SF Pro Text", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --rounded: ui-rounded, "SF Pro Rounded", -apple-system, "PingFang SC", sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --ease: cubic-bezier(0.2, 0.8, 0.2, 1);
  color-scheme: dark;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  background: var(--bg); color: var(--text); font-family: var(--sans);
  font-size: 16px; line-height: 1.6; -webkit-font-smoothing: antialiased; overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img, video { display: block; max-width: 100%; }
::selection { background: rgba(167, 139, 250, 0.35); }

/* 双语:同一份 DOM 里两种语言都在,按 <html data-lang> 显示一种 */
html[data-lang="zh"] [data-l="en"], html[data-lang="en"] [data-l="zh"] { display: none !important; }

/* ── 背景层 ── */
#aurora { position: fixed; inset: 0; width: 100vw; height: 100vh; z-index: -3; display: block; }
.bg-fallback {
  position: fixed; inset: 0; z-index: -4;
  background:
    radial-gradient(60vw 50vh at 20% 15%, rgba(109, 91, 208, 0.28), transparent 70%),
    radial-gradient(50vw 45vh at 85% 30%, rgba(63, 143, 191, 0.2), transparent 70%),
    radial-gradient(55vw 50vh at 60% 95%, rgba(217, 130, 91, 0.16), transparent 70%),
    var(--bg);
}
.bg-grid {
  position: fixed; inset: 0; z-index: -2; pointer-events: none;
  background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(ellipse 70% 55% at 50% 30%, #000 20%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 70% 55% at 50% 30%, #000 20%, transparent 80%);
  opacity: 0.55;
}
.bg-grain {
  position: fixed; inset: -50%; z-index: -1; pointer-events: none; opacity: 0.06;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.wrap { width: min(1160px, 100% - 32px); margin: 0 auto; }

/* ── 导航:悬浮玻璃胶囊 ── */
.nav {
  position: fixed; top: 16px; left: 50%; transform: translateX(-50%); z-index: 50;
  display: flex; align-items: center; gap: 4px; padding: 6px 6px 6px 18px; border-radius: 999px;
  background: rgba(14, 14, 20, 0.55); border: 1px solid var(--line-2);
  backdrop-filter: blur(18px) saturate(160%); -webkit-backdrop-filter: blur(18px) saturate(160%);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.06);
  white-space: nowrap;
}
.nav .brand { font-family: var(--rounded); font-weight: 800; letter-spacing: -0.02em; margin-right: 10px; font-size: 15px; }
.nav a.link { font-size: 13.5px; color: var(--text-2); padding: 7px 12px; border-radius: 999px; transition: color 0.2s, background 0.2s; }
.nav a.link:hover, .nav a.link.active { color: var(--text); background: rgba(255, 255, 255, 0.07); }
.lang-toggle {
  display: flex; margin-left: 6px; padding: 3px; border-radius: 999px; background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--line); cursor: pointer; font: 600 12px/1 var(--sans); color: var(--text-3);
}
.lang-toggle span { padding: 6px 9px; border-radius: 999px; transition: all 0.25s var(--ease); }
html[data-lang="zh"] .lang-toggle [data-v="zh"], html[data-lang="en"] .lang-toggle [data-v="en"] { background: var(--text); color: #111; }

/* ── 首屏 ── */
.hero { padding: 150px 0 40px; position: relative; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 10px; font: 500 12.5px/1 var(--mono); letter-spacing: 0.08em;
  color: var(--text-2); padding: 8px 14px; border-radius: 999px; border: 1px solid var(--line-2); background: rgba(255, 255, 255, 0.03);
}
.eyebrow .dot { width: 7px; height: 7px; border-radius: 50%; background: #4ade80; box-shadow: 0 0 12px #4ade80; animation: pulse 2.4s infinite; }
@keyframes pulse { 50% { opacity: 0.35; } }
.hero h1 {
  margin-top: 26px; font-size: clamp(40px, 6.6vw, 88px); line-height: 1.04; letter-spacing: -0.035em; font-weight: 750;
  white-space: pre-line; max-width: 13em;
}
html[data-lang="zh"] .hero h1 { letter-spacing: -0.01em; line-height: 1.12; }
.hero h1 .grad {
  background: linear-gradient(100deg, #fff 0%, #fff 35%, var(--violet) 55%, var(--sky) 75%, #fff 100%);
  background-size: 220% 100%; -webkit-background-clip: text; background-clip: text; color: transparent;
  animation: sheen 9s var(--ease) infinite;
}
@keyframes sheen { 0% { background-position: 100% 0; } 60%, 100% { background-position: -20% 0; } }
.hero .intro { margin-top: 22px; max-width: 36em; font-size: clamp(16px, 1.6vw, 19px); color: var(--text-2); }
.hero .role { margin-top: 14px; font: 500 13px/1.4 var(--mono); color: var(--text-3); letter-spacing: 0.04em; }

/* ── 区块 ── */
section.block { padding: 70px 0 30px; scroll-margin-top: 80px; }
.block-head { display: flex; align-items: baseline; gap: 16px; margin-bottom: 26px; }
.block-head .idx { font: 500 12.5px/1 var(--mono); color: var(--violet); letter-spacing: 0.1em; }
.block-head h2 { font-size: clamp(26px, 3vw, 34px); letter-spacing: -0.02em; font-weight: 700; }
.block-head .rule { flex: 1; height: 1px; background: linear-gradient(90deg, var(--line-2), transparent); align-self: center; }

/* ── 卡片:深色玻璃 + 指针跟随边光(--mx/--my 由 JS 写入) ── */
.card {
  position: relative; border-radius: var(--radius); background: var(--glass); border: 1px solid var(--line);
  overflow: hidden; isolation: isolate; transition: transform 0.5s var(--ease), border-color 0.3s;
}
.card::before {
  content: ""; position: absolute; inset: 0; border-radius: inherit; padding: 1px; pointer-events: none; z-index: 2;
  background: radial-gradient(420px circle at var(--mx, -999px) var(--my, -999px), rgba(167, 139, 250, 0.75), rgba(125, 211, 252, 0.25) 35%, transparent 60%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude; opacity: 0; transition: opacity 0.3s;
}
.card::after {
  content: ""; position: absolute; inset: 0; pointer-events: none; z-index: -1;
  background: radial-gradient(600px circle at var(--mx, -999px) var(--my, -999px), rgba(167, 139, 250, 0.08), transparent 45%);
  opacity: 0; transition: opacity 0.3s;
}
.card:hover::before, .card:hover::after { opacity: 1; }
.card:hover { border-color: var(--line-2); }

/* 旗舰产品卡 */
.feature { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 0; align-items: stretch; }
.feature .copy { padding: 44px 40px; display: flex; flex-direction: column; }
.kicker { font: 500 12.5px/1 var(--mono); color: var(--violet); letter-spacing: 0.08em; text-transform: uppercase; }
.feature .name {
  font-family: var(--rounded); font-weight: 800; font-size: clamp(52px, 6vw, 76px); letter-spacing: -0.045em; line-height: 1;
  margin-top: 16px; padding-right: 0.08em;
  background: linear-gradient(180deg, #fff, rgba(255, 255, 255, 0.72)); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.feature .tagline { margin-top: 10px; font-size: 21px; font-weight: 600; letter-spacing: -0.01em; }
.feature .desc { margin-top: 16px; color: var(--text-2); font-size: 15.5px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 22px; }
.chip { font-size: 12.5px; color: var(--text-2); padding: 6px 12px; border-radius: 999px; border: 1px solid var(--line-2); background: rgba(255, 255, 255, 0.03); }
.cta-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: auto; padding-top: 30px; }
.btn {
  display: inline-flex; flex-direction: column; justify-content: center; gap: 2px; padding: 13px 22px; border-radius: 16px;
  font-weight: 650; font-size: 15px; transition: transform 0.25s var(--ease), box-shadow 0.25s, background 0.25s;
}
.btn small { font-size: 11.5px; font-weight: 500; opacity: 0.6; }
button.btn { font-family: inherit; text-align: left; cursor: pointer; }
button.btn:disabled { cursor: default; opacity: 0.75; transform: none; }
.btn-primary { background: #fff; color: #0a0a0f; box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.2), 0 10px 30px rgba(167, 139, 250, 0.25); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 0 0 1px #fff, 0 14px 40px rgba(167, 139, 250, 0.45); }
.btn-ghost { border: 1px solid var(--line-2); color: var(--text); background: rgba(255, 255, 255, 0.03); }
.btn-ghost:hover { background: rgba(255, 255, 255, 0.08); transform: translateY(-2px); }

.stage { position: relative; padding: 28px; display: flex; align-items: center; justify-content: center; min-height: 380px; }
.stage::before {
  content: ""; position: absolute; inset: 10% 8%; border-radius: 50%; z-index: 0; filter: blur(60px);
  background: radial-gradient(circle, rgba(139, 124, 246, 0.45), rgba(63, 143, 191, 0.2) 50%, transparent 70%);
}
.screen {
  position: relative; z-index: 1; width: 100%; border-radius: 18px; overflow: hidden; background: #000;
  border: 1px solid var(--line-2); box-shadow: 0 30px 80px rgba(0, 0, 0, 0.6), inset 0 1px 0 rgba(255, 255, 255, 0.1);
  transform: perspective(1400px) rotateY(-7deg) rotateX(3deg); transition: transform 0.8s var(--ease);
}
.feature:hover .screen { transform: perspective(1400px) rotateY(-2deg) rotateX(1deg); }
.screen video { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }
.screen .sound {
  position: absolute; right: 12px; bottom: 12px; border: 0; cursor: pointer; padding: 7px 12px; border-radius: 999px;
  font: 600 12px/1 var(--sans); color: #fff; background: rgba(0, 0, 0, 0.5); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
}
.ver { font: 500 12px/1 var(--mono); color: var(--text-3); margin-top: 14px; }
.ver b { color: #4ade80; font-weight: 600; }

.grid { display: grid; gap: 16px; }
/* 网格/双栏子项默认 min-width:auto,会被视频这类大尺寸内容撑破窄屏 */
.grid > *, .feature > * { min-width: 0; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.mini { padding: 30px; min-height: 220px; display: flex; flex-direction: column; }
.mini h3 { font-size: 22px; letter-spacing: -0.015em; margin-top: 12px; }
.mini p { color: var(--text-2); font-size: 14.5px; margin-top: 8px; }
.meta { display: flex; gap: 10px; align-items: center; font: 500 12px/1 var(--mono); color: var(--text-3); letter-spacing: 0.05em; }
.meta .tag { padding: 4px 9px; border-radius: 999px; border: 1px solid var(--line-2); }

.next-card { border-style: dashed; border-color: var(--line-2); background: transparent; min-height: 0;
  display: grid; grid-template-columns: auto auto 1fr; align-items: center; gap: 6px 22px; padding: 22px 30px; }
.next-card .orb { grid-row: span 2; margin: 0; }
.next-card h3 { margin: 0; font-size: 18px; }
.next-card .meta { grid-row: span 2; order: -1; display: none; }
.next-card p { margin: 0; grid-column: 2 / 4; }
.next-card .orb {
  width: 54px; height: 54px; border-radius: 50%; margin-bottom: 8px;
  background: conic-gradient(from 0deg, var(--violet), var(--sky), var(--amber), var(--violet)); filter: blur(0.5px);
  animation: spin 8s linear infinite; mask: radial-gradient(circle, transparent 52%, #000 54%); -webkit-mask: radial-gradient(circle, transparent 52%, #000 54%);
}
@keyframes spin { to { transform: rotate(1turn); } }

/* 作品卡 */
.work .thumb { position: relative; aspect-ratio: 16 / 9; border-radius: 16px; overflow: hidden; background: #000; border: 1px solid var(--line); }
.work .thumb img, .work .thumb video { width: 100%; height: 100%; object-fit: cover; transition: transform 0.8s var(--ease); }
.work:hover .thumb img { transform: scale(1.04); }
.play {
  position: absolute; inset: 0; display: grid; place-items: center; cursor: pointer; border: 0; background: rgba(0, 0, 0, 0.15);
}
.play span {
  width: 64px; height: 64px; border-radius: 50%; display: grid; place-items: center; font-size: 20px; color: #0a0a0f; padding-left: 4px;
  background: rgba(255, 255, 255, 0.92); box-shadow: 0 0 0 10px rgba(255, 255, 255, 0.12); transition: transform 0.3s var(--ease);
}
.play:hover span { transform: scale(1.1); }
.swatches { display: flex; height: 100%; }
.swatches i { flex: 1; transition: flex 0.5s var(--ease); }
.swatches:hover i:hover { flex: 2.2; }

/* 文章 */
.post-row {
  display: grid; grid-template-columns: 120px 1fr auto; gap: 20px; align-items: baseline; padding: 22px 6px;
  border-bottom: 1px solid var(--line); transition: background 0.3s, padding 0.3s var(--ease);
}
.post-row:hover { background: rgba(255, 255, 255, 0.025); padding-left: 16px; }
.post-row time { font: 500 13px/1 var(--mono); color: var(--text-3); }
.post-row h3 { font-size: 19px; font-weight: 600; letter-spacing: -0.01em; }
.post-row p { color: var(--text-2); font-size: 14.5px; margin-top: 4px; }
.post-row .arrow { color: var(--text-3); transition: transform 0.3s var(--ease), color 0.3s; }
.post-row:hover .arrow { transform: translateX(4px); color: var(--violet); }
.empty {
  padding: 46px 30px; text-align: center; color: var(--text-3); border: 1px dashed var(--line-2); border-radius: var(--radius);
  font-size: 15px;
}
.empty .cursor { display: inline-block; width: 9px; height: 1.1em; background: var(--violet); vertical-align: -3px; margin-left: 4px; animation: blink 1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }

/* 实验室 */
.lab .glyph {
  width: 46px; height: 46px; border-radius: 14px; display: grid; place-items: center; font-size: 22px;
  background: rgba(255, 255, 255, 0.05); border: 1px solid var(--line-2);
}

/* 页脚:巨型描边字标 */
footer { padding: 90px 0 40px; position: relative; overflow: hidden; }
.giant {
  font-family: var(--rounded); font-weight: 800; letter-spacing: -0.05em; line-height: 0.85; text-align: center;
  font-size: clamp(64px, 17vw, 236px); color: transparent; -webkit-text-stroke: 1px rgba(255, 255, 255, 0.16);
  background: linear-gradient(180deg, rgba(167, 139, 250, 0.18), transparent 75%); -webkit-background-clip: text; background-clip: text;
  user-select: none; padding: 0 0.05em;
}
.foot-row { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; margin-top: 36px; color: var(--text-3); font-size: 13.5px; }
.foot-row a { color: var(--text-2); }
.foot-row a:hover { color: var(--text); }

/* 进场动画 */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity 0.9s var(--ease), transform 0.9s var(--ease); transition-delay: var(--d, 0s); }
.reveal.in { opacity: 1; transform: none; }

/* 视频灯箱 */
.lightbox {
  position: fixed; inset: 0; z-index: 100; display: none; align-items: center; justify-content: center; padding: 24px;
  background: rgba(4, 4, 8, 0.82); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
}
.lightbox.open { display: flex; animation: fade 0.3s var(--ease); }
.lightbox video { width: min(1100px, 100%); border-radius: 18px; box-shadow: 0 40px 120px rgba(0, 0, 0, 0.7); }
.lightbox .close { position: absolute; top: 18px; right: 22px; font-size: 28px; color: var(--text-2); background: none; border: 0; cursor: pointer; }
@keyframes fade { from { opacity: 0; } }

/* 文章页 */
.article { max-width: 720px; margin: 0 auto; padding: 140px 0 60px; }
.article .back { font: 500 13px/1 var(--mono); color: var(--text-3); }
.article .back:hover { color: var(--text); }
.article h1 { font-size: clamp(32px, 4.6vw, 48px); line-height: 1.15; letter-spacing: -0.02em; margin: 26px 0 14px; }
.article .byline { font: 500 13px/1 var(--mono); color: var(--text-3); }
.prose { margin-top: 40px; font-size: 17px; color: rgba(242, 241, 246, 0.86); line-height: 1.85; }
.prose > * + * { margin-top: 1.1em; }
.prose h2 { font-size: 26px; margin-top: 1.8em; letter-spacing: -0.015em; color: var(--text); }
.prose h3 { font-size: 20px; margin-top: 1.5em; color: var(--text); }
.prose a { color: var(--violet); border-bottom: 1px solid rgba(167, 139, 250, 0.35); }
.prose code { font-family: var(--mono); font-size: 0.88em; padding: 2px 6px; border-radius: 6px; background: rgba(255, 255, 255, 0.07); }
.prose pre { padding: 18px 20px; border-radius: 14px; background: rgba(255, 255, 255, 0.04); border: 1px solid var(--line); overflow-x: auto; }
.prose pre code { padding: 0; background: none; }
.prose blockquote { border-left: 2px solid var(--violet); padding-left: 18px; color: var(--text-2); }
.prose img { border-radius: 14px; border: 1px solid var(--line); }
.prose ul, .prose ol { padding-left: 1.4em; }
.lang-note { display: inline-block; margin-left: 10px; font: 500 11.5px/1 var(--mono); padding: 4px 8px; border-radius: 999px; border: 1px solid var(--line-2); color: var(--text-3); }

/* ── 窄屏 ── */
@media (max-width: 900px) {
  .feature { grid-template-columns: 1fr; }
  .feature .copy { padding: 30px 24px 10px; }
  .stage { min-height: 0; padding: 20px; }
  .screen { transform: none; }
  .grid-3 { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .nav { padding-left: 14px; }
  .nav a.link { display: none; }
  .hero { padding-top: 120px; }
  .grid-2 { grid-template-columns: 1fr; }
  .post-row { grid-template-columns: 1fr auto; }
  .post-row time { grid-column: 1 / -1; }
  .mini { padding: 24px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}

/* ── 产品详情页(/danos/)── */
.p-hero { padding: 150px 0 30px; text-align: center; }
.p-hero .wordmark {
  font-family: var(--rounded); font-weight: 800; letter-spacing: -0.05em; line-height: 0.95;
  font-size: clamp(84px, 14vw, 180px); padding: 0 0.06em;
  background: linear-gradient(180deg, #fff 30%, rgba(167, 139, 250, 0.85)); -webkit-background-clip: text; background-clip: text; color: transparent;
  filter: drop-shadow(0 0 60px rgba(139, 124, 246, 0.35));
}
.p-hero h1 { margin: 22px auto 0; font-size: clamp(24px, 3.4vw, 40px); line-height: 1.3; font-weight: 650; letter-spacing: -0.015em; white-space: pre-line; max-width: 22em; }
.p-hero .sub { margin: 20px auto 0; max-width: 40em; color: var(--text-2); font-size: clamp(15.5px, 1.5vw, 17.5px); }
.p-hero .cta-row { justify-content: center; padding-top: 30px; }
.p-hero .req { margin-top: 16px; font-size: 13px; color: var(--text-3); }
.p-hero .ver { margin-top: 10px; }
.p-stage { margin-top: 50px; padding: 0; min-height: 0; }
.p-stage .screen { transform: perspective(1800px) rotateX(10deg); max-width: 1040px; margin: 0 auto; }
.p-stage:hover .screen { transform: perspective(1800px) rotateX(2deg); }

.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; position: relative; }
.steps::before {
  content: ""; position: absolute; left: 6%; right: 6%; top: 53px; height: 1px; z-index: -1;
  background: linear-gradient(90deg, transparent, var(--violet), var(--sky), var(--amber), transparent); opacity: 0.6;
}
.step { padding: 28px 24px; }
.step .n { font: 500 12px/1 var(--mono); color: var(--text-3); letter-spacing: 0.1em; }
.step .glyph {
  width: 50px; height: 50px; margin: 14px 0 6px; border-radius: 15px; display: grid; place-items: center; font-size: 23px;
  background: rgba(14, 14, 22, 0.9); border: 1px solid var(--line-2); box-shadow: 0 0 30px rgba(139, 124, 246, 0.25);
}
.step h3 { font-size: 19px; margin-top: 10px; }
.step p { color: var(--text-2); font-size: 14.5px; margin-top: 8px; }

.clusters { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; padding: 10px 0; }
.cl {
  display: inline-flex; align-items: center; gap: 10px; padding: 12px 20px; border-radius: 999px; font-size: 16px; font-weight: 550;
  background: rgba(255, 255, 255, 0.04); border: 1px solid var(--line-2); transition: transform 0.3s var(--ease), box-shadow 0.3s, border-color 0.3s;
}
.cl:hover { transform: translateY(-3px); border-color: rgba(167, 139, 250, 0.6); box-shadow: 0 10px 30px rgba(139, 124, 246, 0.25); }
.cl.noise { opacity: 0.45; text-decoration: line-through; text-decoration-color: rgba(255, 255, 255, 0.3); }
.cl-note { text-align: center; color: var(--text-3); font-size: 14px; margin-top: 14px; }

.privacy { padding: 60px 48px; text-align: center; }
.privacy h2 { font-size: clamp(26px, 3.6vw, 44px); line-height: 1.25; letter-spacing: -0.02em; white-space: pre-line; }
.privacy h2 em { font-style: normal; background: linear-gradient(90deg, var(--violet), var(--sky)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.privacy p { margin: 18px auto 0; max-width: 34em; color: var(--text-2); }
.badges { display: flex; justify-content: center; flex-wrap: wrap; gap: 10px; margin-top: 26px; }
.badge { display: inline-flex; align-items: center; gap: 8px; padding: 9px 16px; border-radius: 999px; font-size: 14px; border: 1px solid var(--line-2); background: rgba(255, 255, 255, 0.03); }
.badge::before { content: "✕"; color: #4ade80; font-size: 11px; font-weight: 700; }

.cost { display: grid; grid-template-columns: 1.1fr 1fr 1fr; gap: 16px; align-items: stretch; }
.cost .intro-card { padding: 30px; }
.cost .intro-card h3 { font-size: 22px; }
.cost .intro-card p { color: var(--text-2); margin-top: 10px; font-size: 14.5px; }
.plan { padding: 30px; display: flex; flex-direction: column; }
.plan .pname { font: 500 13px/1 var(--mono); color: var(--text-3); letter-spacing: 0.05em; }
.plan .price { font-family: var(--rounded); font-weight: 800; font-size: 44px; letter-spacing: -0.03em; margin-top: 14px; line-height: 1; }
.plan .unit { color: var(--text-2); font-size: 14px; margin-top: 10px; }

.faq details { border-bottom: 1px solid var(--line); }
.faq summary {
  list-style: none; cursor: pointer; display: flex; justify-content: space-between; align-items: center; gap: 20px;
  padding: 22px 4px; font-size: 17.5px; font-weight: 600;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font: 400 24px/1 var(--mono); color: var(--text-3); transition: transform 0.3s var(--ease); }
.faq details[open] summary::after { transform: rotate(45deg); color: var(--violet); }
.faq details p { padding: 0 4px 24px; color: var(--text-2); max-width: 46em; }

.cta-band { margin-top: 30px; padding: 56px 40px; text-align: center; }
.cta-band h2 { font-size: clamp(28px, 3.4vw, 42px); letter-spacing: -0.02em; }
.cta-band .cta-row { justify-content: center; }
.cta-band .links { margin-top: 18px; font-size: 13.5px; color: var(--text-3); }
.cta-band .links a { color: var(--text-2); }
.cta-band .links a:hover { color: var(--text); }

@media (max-width: 900px) {
  .steps { grid-template-columns: repeat(2, 1fr); }
  .steps::before { display: none; }
  .cost { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .p-hero { padding-top: 120px; }
  .p-hero h1, .privacy h2 { white-space: normal; } /* 手动换行是按宽屏断的,窄屏让它自然折行 */
  .steps { grid-template-columns: 1fr; }
  .privacy { padding: 40px 22px; }
  .p-stage .screen { transform: none; }
}