/* ══════════════════════════════════════════════════════════
   小葱超级智能体 · 下载站样式
   设计语言：主站暖米色 + 橙色主色，深墨色做对比段落
   ══════════════════════════════════════════════════════════ */

:root {
  --ink: #16120f;
  --ink-2: #221b16;
  --ink-3: #2e251e;
  --cream: #fffbf5;
  --cream-2: #fdf6ec;
  --surface: #ffffff;
  --accent: #ff6b35;
  --accent-2: #ff9a5a;
  --accent-3: #ffd166;
  --accent-dark: #e2531f;
  --border: #f2ece2;
  --line: #e9e1d4;
  --text: #1f1f1f;
  --muted: #7c736b;
  --muted-2: #a89e94;
  --green: #12b76a;
  --r-sm: 12px;
  --r: 20px;
  --r-lg: 28px;
  --shadow-sm: 0 1px 2px rgba(31, 31, 31, .04), 0 6px 16px -10px rgba(31, 31, 31, .14);
  --shadow: 0 2px 4px rgba(31, 31, 31, .04), 0 18px 40px -18px rgba(31, 31, 31, .18);
  --shadow-lg: 0 30px 70px -30px rgba(22, 18, 15, .35);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB",
          "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--cream);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
b { font-weight: 800; }

.wrap { width: 100%; max-width: 1180px; margin: 0 auto; padding: 0 24px; }
.wrap.narrow { max-width: 880px; }

/* 固定导航锚点补偿 */
[id] { scroll-margin-top: 88px; }

/* ── 按钮 ─────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  border: 0; cursor: pointer; font-family: inherit; font-weight: 800;
  border-radius: 999px; padding: 13px 26px; font-size: 15px; line-height: 1;
  transition: transform .18s cubic-bezier(.22,1,.36,1), box-shadow .25s, background .2s, color .2s;
  white-space: nowrap;
}
.btn-sm { padding: 10px 18px; font-size: 14px; }
.btn-lg { padding: 17px 34px; font-size: 16.5px; }
.btn-xl { padding: 20px 44px; font-size: 18px; }

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, #ff8a4c 0%, var(--accent) 45%, #f2541c 100%);
  box-shadow: 0 10px 26px -10px rgba(255, 107, 53, .75), inset 0 1px 0 rgba(255, 255, 255, .28);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 34px -12px rgba(255, 107, 53, .85), inset 0 1px 0 rgba(255,255,255,.3); }
.btn-primary:active { transform: translateY(0); }

.btn-ghost {
  color: var(--text); background: rgba(255, 255, 255, .7);
  box-shadow: inset 0 0 0 2px var(--line);
}
.btn-ghost:hover { background: #fff; box-shadow: inset 0 0 0 2px var(--accent); color: var(--accent-dark); transform: translateY(-2px); }
.btn .ar { font-weight: 700; opacity: .7; }

/* ── 导航 ─────────────────────────────────────────────── */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 90;
  padding: 14px 0;
  transition: background .3s, box-shadow .3s, padding .3s, backdrop-filter .3s;
}
.nav.scrolled {
  background: rgba(255, 251, 245, .88);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  box-shadow: 0 1px 0 var(--border), 0 10px 30px -22px rgba(0, 0, 0, .3);
  padding: 9px 0;
}
.nav-in { display: flex; align-items: center; gap: 26px; }

.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 900; font-size: 17px; letter-spacing: -.02em; color: #fff; }
.brand img { border-radius: 9px; }
.brand b { color: var(--accent-2); font-weight: 900; }
.nav.scrolled .brand { color: var(--text); }
.nav.scrolled .brand b { color: var(--accent); }

.nav-links { display: flex; gap: 26px; margin-left: auto; }
.nav-links a { font-size: 14.5px; font-weight: 600; color: rgba(255, 255, 255, .74); transition: color .2s; }
.nav-links a:hover { color: #fff; }
.nav.scrolled .nav-links a { color: var(--muted); }
.nav.scrolled .nav-links a:hover { color: var(--accent-dark); }

.nav-cta { margin-left: 4px; }

.burger { display: none; margin-left: auto; width: 42px; height: 42px; border-radius: 12px; background: rgba(255,255,255,.1); box-shadow: inset 0 0 0 1.5px rgba(255,255,255,.18); border: 0; cursor: pointer; flex-direction: column; align-items: center; justify-content: center; gap: 4px; }
.burger span { display: block; width: 18px; height: 2px; background: #fff; border-radius: 2px; transition: .25s; }
.nav.scrolled .burger { background: #fff; box-shadow: inset 0 0 0 1.5px var(--line); }
.nav.scrolled .burger span { background: var(--text); }
.burger.open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.burger.open span:nth-child(2) { opacity: 0; }
.burger.open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ── 首屏 ─────────────────────────────────────────────── */
.hero {
  position: relative; overflow: hidden;
  background:
    radial-gradient(900px 520px at 78% 8%, rgba(255, 107, 53, .22), transparent 62%),
    radial-gradient(700px 480px at 12% 96%, rgba(255, 209, 102, .10), transparent 60%),
    linear-gradient(180deg, #191410 0%, var(--ink) 55%, #100d0a 100%);
  color: #fff;
  padding: 132px 0 0;
  isolation: isolate;
}
.hero::after {
  content: ""; position: absolute; inset: auto 0 0 0; height: 120px;
  background: linear-gradient(180deg, transparent, var(--cream) 96%);
  z-index: 2; pointer-events: none;
}
.hero-glow {
  position: absolute; width: 620px; height: 620px; right: -140px; top: -180px;
  background: radial-gradient(circle, rgba(255, 138, 76, .34), transparent 68%);
  filter: blur(30px); pointer-events: none;
}
.hero-grid-bg {
  position: absolute; inset: 0; pointer-events: none; opacity: .5;
  background-image:
    linear-gradient(rgba(255, 255, 255, .035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .035) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(circle at 50% 0%, #000 0%, transparent 72%);
  -webkit-mask-image: radial-gradient(circle at 50% 0%, #000 0%, transparent 72%);
}
.hero-in {
  position: relative; z-index: 3;
  display: grid; grid-template-columns: 1.02fr .98fr; gap: 56px; align-items: center;
  padding-bottom: 46px;
}

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px; flex-wrap: wrap;
  font-size: 13.5px; font-weight: 600; color: rgba(255, 255, 255, .66);
  background: rgba(255, 255, 255, .06);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .12);
  padding: 8px 16px; border-radius: 999px; margin-bottom: 26px;
  letter-spacing: .01em;
}
.eyebrow b { color: #fff; }
.eyebrow .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 4px rgba(18, 183, 106, .18); }
.eyebrow .sep { opacity: .35; }

.hero h1 {
  margin: 0 0 22px;
  font-size: clamp(40px, 5.4vw, 74px);
  line-height: 1.06; letter-spacing: -.045em; font-weight: 900;
}
.hero h1 .hl {
  background: linear-gradient(102deg, #ffd166 0%, var(--accent-2) 34%, var(--accent) 78%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  display: inline-block;
}
.hero .lead {
  font-size: clamp(15.5px, 1.4vw, 18px); color: rgba(255, 255, 255, .74);
  margin: 0 0 26px; max-width: 540px; line-height: 1.75;
}

.pills { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 32px; }
.pill {
  font-size: 13.5px; font-weight: 600; color: rgba(255, 255, 255, .8);
  padding: 7px 15px; border-radius: 999px;
  background: rgba(255, 255, 255, .055);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .1);
}
.pill b { color: var(--accent-2); font-size: 15px; }

.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 20px; }
.hero-cta .btn-ghost { color: #fff; background: rgba(255, 255, 255, .06); box-shadow: inset 0 0 0 2px rgba(255, 255, 255, .16); }
.hero-cta .btn-ghost:hover { background: rgba(255, 255, 255, .12); color: #fff; box-shadow: inset 0 0 0 2px rgba(255, 255, 255, .34); }

.hero-meta { font-size: 13px; color: rgba(255, 255, 255, .45); margin: 0; letter-spacing: .01em; }

/* ── 应用窗口模拟 ─────────────────────────────────────── */
.hero-visual { position: relative; }
.app-mock {
  position: relative; border-radius: 18px; overflow: hidden;
  background: linear-gradient(170deg, #241d18, #1a1512);
  box-shadow: 0 40px 90px -40px rgba(0, 0, 0, .9), 0 0 0 1px rgba(255, 255, 255, .09),
              inset 0 1px 0 rgba(255, 255, 255, .08);
  transform: perspective(1400px) rotateY(-7deg) rotateX(3deg);
  transition: transform .8s cubic-bezier(.22,1,.36,1);
}
.hero-visual:hover .app-mock { transform: perspective(1400px) rotateY(-3deg) rotateX(1.5deg) translateY(-4px); }
.app-bar {
  display: flex; align-items: center; gap: 9px;
  padding: 13px 16px; font-size: 12.5px; font-weight: 700; color: rgba(255, 255, 255, .82);
  background: rgba(255, 255, 255, .045);
  box-shadow: inset 0 -1px 0 rgba(255, 255, 255, .07);
}
.app-bar img { border-radius: 6px; }
.app-dots { margin-left: auto; display: inline-flex; gap: 5px; }
.app-dots b { width: 8px; height: 8px; border-radius: 50%; background: rgba(255, 255, 255, .18); display: block; }
.app-dots b:first-child { background: rgba(255, 107, 53, .6); }
.app-body { padding: 18px 16px 16px; display: flex; flex-direction: column; gap: 13px; }

.msg { border-radius: 14px; font-size: 13.5px; line-height: 1.62; }
.msg.me {
  align-self: flex-end; max-width: 88%;
  background: linear-gradient(135deg, #ff8a4c, var(--accent));
  color: #fff; padding: 11px 15px; font-weight: 600;
  box-shadow: 0 10px 24px -14px rgba(255, 107, 53, .9);
}
.msg.bot {
  background: rgba(255, 255, 255, .055);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .08);
  padding: 13px 14px; color: rgba(255, 255, 255, .82);
}
.steps { display: flex; flex-direction: column; gap: 8px; margin-bottom: 12px; }
.step { display: flex; align-items: center; gap: 9px; font-size: 12.8px; color: rgba(255, 255, 255, .72); }
.step b {
  width: 18px; height: 18px; flex: 0 0 18px; border-radius: 6px; font-size: 10.5px;
  display: grid; place-items: center; background: rgba(255, 107, 53, .18); color: var(--accent-2);
}
.step span { margin-left: auto; color: var(--green); font-weight: 800; font-size: 12px; }

.file {
  display: flex; align-items: center; gap: 11px;
  background: rgba(255, 255, 255, .06); border-radius: 11px; padding: 10px 12px;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .08);
}
.fico {
  font-style: normal; font-size: 9.5px; font-weight: 900; letter-spacing: .04em;
  color: #0b3d24; background: linear-gradient(135deg, #7ce0a5, #22c55e);
  border-radius: 6px; padding: 7px 6px;
}
.fmeta { font-style: normal; display: flex; flex-direction: column; line-height: 1.35; }
.fmeta b { font-size: 12.8px; color: #fff; font-weight: 700; }
.fmeta em { font-style: normal; font-size: 11px; color: rgba(255, 255, 255, .42); }

.app-input {
  display: flex; align-items: center; gap: 10px; margin-top: 3px;
  border-radius: 999px; padding: 11px 15px; font-size: 12.5px; color: rgba(255, 255, 255, .32);
  background: rgba(255, 255, 255, .045);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .08);
}
.app-input i {
  margin-left: auto; font-style: normal; width: 24px; height: 24px; border-radius: 50%;
  display: grid; place-items: center; background: rgba(255, 107, 53, .9); color: #fff; font-size: 12px;
}

.float-tag {
  position: absolute; font-size: 11.5px; font-weight: 700; padding: 7px 13px; border-radius: 999px;
  background: rgba(255, 255, 255, .92); color: var(--ink);
  box-shadow: 0 14px 30px -14px rgba(0, 0, 0, .6);
  animation: floaty 5.5s ease-in-out infinite;
}
.float-tag.t1 { top: -14px; left: -22px; animation-delay: 0s; }
.float-tag.t2 { bottom: 74px; right: -26px; animation-delay: 1.4s; color: #0a6b3f; background: #d9fbe8; }
.float-tag.t3 { bottom: -16px; left: 34px; animation-delay: 2.6s; }
@keyframes floaty { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-9px); } }

/* ── 数据条 ───────────────────────────────────────────── */
.statbar {
  position: relative; z-index: 4;
  display: grid; grid-template-columns: repeat(5, 1fr); gap: 0;
  background: rgba(26, 21, 17, .72);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .13), 0 24px 50px -34px rgba(0, 0, 0, .9);
  border-radius: var(--r); padding: 22px 8px; margin-bottom: 34px;
  backdrop-filter: blur(16px) saturate(150%);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
}
.stat { text-align: center; padding: 0 10px; }
.stat + .stat { box-shadow: inset 1px 0 0 rgba(255, 255, 255, .08); }
.stat b { display: block; font-size: clamp(20px, 2.2vw, 27px); font-weight: 900; letter-spacing: -.03em; color: #fff; }
.stat b i { font-style: normal; color: var(--accent-2); }
.stat span { font-size: 12px; color: rgba(255, 255, 255, .45); letter-spacing: .04em; }

/* ── 区块通用 ─────────────────────────────────────────── */
.sec { padding: 92px 0; position: relative; }
.sec-cream { background: var(--cream); }
.sec-white { background: var(--surface); }
.sec-dark { background: linear-gradient(180deg, #17120e, #120f0c); color: #fff; overflow: hidden; }
.sec-dark::before {
  content: ""; position: absolute; width: 800px; height: 500px; left: 50%; top: -160px;
  transform: translateX(-50%);
  background: radial-gradient(circle, rgba(255, 107, 53, .18), transparent 66%);
  filter: blur(20px); pointer-events: none;
}

.sec-head { max-width: 760px; margin: 0 auto 52px; text-align: center; }
.sec-head h2 {
  margin: 16px 0 18px;
  font-size: clamp(28px, 3.6vw, 46px); line-height: 1.18; letter-spacing: -.035em; font-weight: 900;
}
.sec-lead { font-size: clamp(15px, 1.2vw, 17px); color: var(--muted); margin: 0; line-height: 1.8; }
.sec-lead b { color: var(--text); }
.sec-dark .sec-lead { color: rgba(255, 255, 255, .58); }
.sec-dark .sec-lead b { color: #fff; }

.tag {
  display: inline-block; font-size: 12.5px; font-weight: 800; letter-spacing: .08em;
  color: var(--accent-dark); background: rgba(255, 107, 53, .1);
  padding: 6px 14px; border-radius: 999px;
}
.tag-dark { color: var(--accent-2); background: rgba(255, 107, 53, .16); }

/* ── 痛点 ─────────────────────────────────────────────── */
.pain-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.pain {
  background: var(--surface); border-radius: var(--r); padding: 28px 24px;
  box-shadow: var(--shadow-sm), inset 0 0 0 1px var(--border);
  transition: transform .3s cubic-bezier(.22,1,.36,1), box-shadow .3s;
}
.pain:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.pain .emoji { font-size: 26px; font-style: normal; display: block; margin-bottom: 14px; }
.pain h3 { margin: 0 0 8px; font-size: 17px; font-weight: 800; letter-spacing: -.02em; }
.pain p { margin: 0; font-size: 14px; color: var(--muted); line-height: 1.72; }

.turn {
  text-align: center; margin: 46px auto 0; max-width: 720px;
  font-size: clamp(17px, 2vw, 22px); font-weight: 700; letter-spacing: -.02em; line-height: 1.6;
}
.turn b { color: var(--accent-dark); }

/* ── 对比表 ───────────────────────────────────────────── */
.table-wrap {
  overflow-x: auto; border-radius: var(--r-lg);
  box-shadow: var(--shadow), inset 0 0 0 1px var(--border);
  background: var(--surface); -webkit-overflow-scrolling: touch;
}
.cmp { width: 100%; border-collapse: collapse; min-width: 720px; font-size: 14.5px; }
.cmp th, .cmp td { padding: 16px 20px; text-align: left; vertical-align: middle; }
.cmp thead th {
  font-size: 13px; font-weight: 800; color: var(--muted); letter-spacing: .02em;
  background: var(--cream-2); border-bottom: 1px solid var(--border); white-space: nowrap;
}
.cmp thead th.c-dim { color: var(--text); }
.cmp thead th.c-us { color: var(--accent-dark); background: rgba(255, 107, 53, .08); }
.cmp tbody tr + tr th, .cmp tbody tr + tr td { border-top: 1px solid var(--border); }
.cmp tbody th { font-weight: 700; color: var(--text); white-space: nowrap; background: #fff; }
.cmp tbody td { color: var(--muted); }
.cmp tbody td.c-us { color: var(--text); font-weight: 700; background: rgba(255, 107, 53, .045); }
.cmp tbody tr:hover td { background: var(--cream-2); }
.cmp tbody tr:hover td.c-us { background: rgba(255, 107, 53, .1); }
.table-hint { display: none; text-align: center; font-size: 12.5px; color: var(--muted-2); margin: 12px 0 0; }

/* ── Bento 能力卡 ─────────────────────────────────────── */
.bento { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card {
  position: relative; background: var(--surface); border-radius: var(--r-lg);
  padding: 30px 26px; box-shadow: var(--shadow-sm), inset 0 0 0 1px var(--border);
  transition: transform .3s cubic-bezier(.22,1,.36,1), box-shadow .3s;
  overflow: hidden;
}
.card:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.card.big { grid-column: span 2; }
.card.big::after {
  content: ""; position: absolute; right: -80px; bottom: -100px; width: 300px; height: 300px;
  background: radial-gradient(circle, rgba(255, 107, 53, .16), transparent 68%);
}
.card-ico {
  font-size: 24px; margin-bottom: 16px; width: 48px; height: 48px; border-radius: 14px;
  display: grid; place-items: center; background: var(--cream-2);
  box-shadow: inset 0 0 0 1px var(--border);
}
.card h3 { margin: 0 0 10px; font-size: 19px; font-weight: 900; letter-spacing: -.025em; }
.card p { margin: 0; font-size: 14.5px; color: var(--muted); line-height: 1.75; }
.card .quote {
  margin-top: 18px; font-size: 13.5px; line-height: 1.9; color: var(--accent-dark);
  background: rgba(255, 107, 53, .07); border-radius: var(--r-sm); padding: 14px 16px;
  font-weight: 700;
}

.mid-cta { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 16px; margin-top: 44px; }
.mid-cta span { font-size: 13.5px; color: var(--muted); }

/* ── 模型墙 ───────────────────────────────────────────── */
.chips { display: flex; flex-wrap: wrap; gap: 11px; justify-content: center; max-width: 900px; margin: 0 auto; }
.chip {
  font-size: 14px; font-weight: 700; padding: 11px 20px; border-radius: 999px;
  color: rgba(255, 255, 255, .82);
  background: rgba(255, 255, 255, .05);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .1);
  transition: .22s;
}
.chip:hover { background: rgba(255, 107, 53, .16); color: #fff; box-shadow: inset 0 0 0 1px rgba(255, 107, 53, .5); transform: translateY(-2px); }
.chip-more { color: var(--accent-2); background: rgba(255, 107, 53, .12); box-shadow: inset 0 0 0 1px rgba(255, 107, 53, .3); }

.model-notes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 52px; }
.mnote {
  padding: 22px 24px; border-radius: var(--r);
  background: rgba(255, 255, 255, .04);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .08);
}
.mnote b { display: block; font-size: 26px; font-weight: 900; letter-spacing: -.03em; color: var(--accent-2); margin-bottom: 6px; }
.mnote span { font-size: 13.5px; color: rgba(255, 255, 255, .55); line-height: 1.7; }

/* ── 技能 ─────────────────────────────────────────────── */
.skill-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.skill {
  background: var(--surface); border-radius: var(--r); padding: 24px 22px;
  box-shadow: var(--shadow-sm), inset 0 0 0 1px var(--border);
  transition: transform .28s cubic-bezier(.22,1,.36,1), box-shadow .28s;
}
.skill:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.skill i { font-size: 22px; font-style: normal; display: block; margin-bottom: 12px; }
.skill b { display: block; font-size: 16px; margin-bottom: 6px; letter-spacing: -.02em; }
.skill span { font-size: 13.5px; color: var(--muted); line-height: 1.7; }

/* ── 信任 ─────────────────────────────────────────────── */
.trust-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; }
.trust i { font-size: 22px; font-style: normal; display: block; margin-bottom: 12px; }
.trust b { display: block; font-size: 16px; margin-bottom: 7px; letter-spacing: -.02em; }
.trust p { margin: 0; font-size: 13.5px; color: var(--muted); line-height: 1.72; }

/* ── 下载区 ───────────────────────────────────────────── */
.dl-panel {
  background: linear-gradient(165deg, #1d1712 0%, #16120f 60%, #100d0a 100%);
  border-radius: 34px; padding: 58px 46px 46px; color: #fff;
  box-shadow: var(--shadow-lg), inset 0 1px 0 rgba(255, 255, 255, .07);
  position: relative; overflow: hidden;
}
.dl-panel::before {
  content: ""; position: absolute; width: 720px; height: 420px; right: -160px; top: -180px;
  background: radial-gradient(circle, rgba(255, 107, 53, .26), transparent 66%); filter: blur(16px);
}
.dl-head { position: relative; text-align: center; margin-bottom: 40px; }
.dl-head h2 { margin: 16px 0 12px; font-size: clamp(26px, 3.2vw, 40px); font-weight: 900; letter-spacing: -.035em; line-height: 1.2; }
.dl-head p { margin: 0; font-size: 14px; color: rgba(255, 255, 255, .52); }
.dl-head p b { color: #fff; }
.stale { color: var(--accent-3); }

.dl-cards { display: grid; grid-template-columns: 1.6fr 1fr; gap: 16px; position: relative; }
.dl-card {
  position: relative; display: flex; flex-direction: column; gap: 7px;
  padding: 26px 24px 22px; border-radius: var(--r-lg);
  background: rgba(255, 255, 255, .045);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .1);
  transition: transform .3s cubic-bezier(.22,1,.36,1), background .3s, box-shadow .3s;
}
.dl-card:hover { transform: translateY(-5px); background: rgba(255, 255, 255, .075); box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .2), 0 24px 50px -30px rgba(0, 0, 0, .9); }
.dl-card.primary {
  background: linear-gradient(160deg, rgba(255, 107, 53, .22), rgba(255, 107, 53, .08));
  box-shadow: inset 0 0 0 1.5px rgba(255, 107, 53, .55), 0 20px 50px -30px rgba(255, 107, 53, .7);
}
.dl-badge {
  position: absolute; top: -10px; left: 24px;
  font-size: 11px; font-weight: 900; letter-spacing: .06em;
  padding: 4px 12px; border-radius: 999px; color: #fff;
  background: linear-gradient(135deg, #ff8a4c, var(--accent));
  box-shadow: 0 8px 18px -8px rgba(255, 107, 53, .9);
}
.dl-badge.ghost { background: rgba(255, 255, 255, .16); color: rgba(255, 255, 255, .82); box-shadow: none; }
.dl-title { font-size: 20px; font-weight: 900; letter-spacing: -.025em; margin-top: 6px; }
.dl-note { font-size: 13px; color: rgba(255, 255, 255, .55); line-height: 1.6; }
.dl-meta { font-size: 12px; color: rgba(255, 255, 255, .38); font-variant-numeric: tabular-nums; }
.dl-btn {
  margin-top: 14px; text-align: center; font-size: 14px; font-weight: 800;
  padding: 12px; border-radius: 999px; color: #fff;
  background: rgba(255, 255, 255, .1);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .14);
  transition: .22s;
}
.dl-card.primary .dl-btn { background: linear-gradient(135deg, #ff8a4c, var(--accent)); box-shadow: 0 12px 26px -12px rgba(255, 107, 53, .9); }
.dl-card:hover .dl-btn { background: #fff; color: var(--ink); }
.dl-card.primary:hover .dl-btn { background: #fff; color: var(--accent-dark); }

.dl-foot {
  display: grid; grid-template-columns: 1.25fr 1.25fr .9fr; gap: 28px;
  margin-top: 38px; padding-top: 32px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .09);
  position: relative;
}
.dl-foot > div { display: flex; flex-direction: column; gap: 9px; }
.dl-foot b { font-size: 12.5px; letter-spacing: .08em; color: rgba(255, 255, 255, .4); font-weight: 800; margin-bottom: 2px; }
.dl-foot span { font-size: 13.5px; color: rgba(255, 255, 255, .72); display: flex; align-items: center; gap: 8px; }
.dl-steps span i {
  font-style: normal; width: 19px; height: 19px; border-radius: 50%; font-size: 11px; font-weight: 900;
  display: grid; place-items: center; background: rgba(255, 107, 53, .22); color: var(--accent-2);
}
.dl-share .btn-ghost { color: #fff; background: rgba(255, 255, 255, .07); box-shadow: inset 0 0 0 1.5px rgba(255, 255, 255, .16); align-self: flex-start; }
.dl-share .btn-ghost:hover { background: #fff; color: var(--ink); box-shadow: none; }
.share-tip { font-size: 12.5px !important; color: rgba(255, 255, 255, .38) !important; }
.qr-wrap { display: flex; align-items: center; gap: 14px; }
.qr-wrap img {
  width: 92px; height: 92px; flex: 0 0 92px;
  border-radius: 12px; background: #fff; padding: 5px;
  box-shadow: 0 10px 24px -14px rgba(0, 0, 0, .9);
}
.qr-meta { display: flex; flex-direction: column; gap: 9px; align-items: flex-start; min-width: 0; }

/* ── FAQ ──────────────────────────────────────────────── */
.faq { display: flex; flex-direction: column; gap: 12px; }
.qa {
  background: var(--surface); border-radius: var(--r);
  box-shadow: var(--shadow-sm), inset 0 0 0 1px var(--border);
  overflow: hidden; transition: box-shadow .25s;
}
.qa[open] { box-shadow: var(--shadow); }
.qa summary {
  list-style: none; cursor: pointer; padding: 20px 56px 20px 24px; position: relative;
  font-size: 16px; font-weight: 800; letter-spacing: -.015em; line-height: 1.55;
}
.qa summary::-webkit-details-marker { display: none; }
.qa summary::after {
  content: "+"; position: absolute; right: 24px; top: 50%; transform: translateY(-50%);
  width: 26px; height: 26px; border-radius: 50%; display: grid; place-items: center;
  font-size: 17px; font-weight: 700; color: var(--accent-dark); background: rgba(255, 107, 53, .1);
  transition: .25s;
}
.qa[open] summary::after { content: "−"; background: var(--accent); color: #fff; }
.qa-body { padding: 0 24px 22px; font-size: 14.5px; color: var(--muted); line-height: 1.85; }

/* ── 结尾 CTA ─────────────────────────────────────────── */
.final {
  background:
    radial-gradient(760px 380px at 50% 0%, rgba(255, 107, 53, .18), transparent 68%),
    linear-gradient(180deg, #16120f, #0f0c09);
  color: #fff; padding: 96px 0 104px; text-align: center;
}
.final-in h2 { margin: 0 0 18px; font-size: clamp(28px, 3.8vw, 48px); font-weight: 900; letter-spacing: -.04em; line-height: 1.16; }
.final-in > p { margin: 0 0 30px; font-size: 15px; color: rgba(255, 255, 255, .55); }
.final-sub { margin: 26px 0 0 !important; font-size: 13px !important; color: rgba(255, 255, 255, .38) !important; }
.final-sub b { color: rgba(255, 255, 255, .75); }

/* ── 页脚 ─────────────────────────────────────────────── */
.foot { background: #0d0b08; color: rgba(255, 255, 255, .6); padding: 64px 0 30px; }
.foot-in { display: grid; grid-template-columns: 1.1fr 1.4fr; gap: 48px; padding-bottom: 44px; box-shadow: inset 0 -1px 0 rgba(255, 255, 255, .08); }
.foot-brand .brand { color: #fff; margin-bottom: 14px; }
.foot-brand p { margin: 0; font-size: 13.5px; line-height: 1.8; max-width: 320px; color: rgba(255, 255, 255, .42); }
.foot-cols { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.foot-col { display: flex; flex-direction: column; gap: 10px; }
.foot-col b { font-size: 12.5px; letter-spacing: .08em; color: rgba(255, 255, 255, .85); font-weight: 800; margin-bottom: 2px; }
.foot-col a { font-size: 13.5px; color: rgba(255, 255, 255, .5); transition: color .2s; }
.foot-col a:hover { color: var(--accent-2); }
.foot-bottom {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: 10px; padding-top: 24px; font-size: 12.5px; color: rgba(255, 255, 255, .34);
}
.foot-bottom a:hover { color: rgba(255, 255, 255, .7); }

/* ── 手机常驻条 ───────────────────────────────────────── */
.mobile-bar {
  display: none; position: fixed; left: 12px; right: 12px; bottom: 12px; z-index: 95;
  align-items: center; gap: 12px; padding: 11px 14px;
  border-radius: 18px; background: rgba(22, 18, 15, .94);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 20px 44px -18px rgba(0, 0, 0, .8), inset 0 0 0 1px rgba(255, 255, 255, .1);
  transform: translateY(140%); transition: transform .4s cubic-bezier(.22,1,.36,1);
}
.mobile-bar.show { transform: translateY(0); }
.mb-info { display: flex; flex-direction: column; line-height: 1.35; min-width: 0; }
.mb-info b { font-size: 14px; color: #fff; font-weight: 800; white-space: nowrap; }
.mb-info span { font-size: 11.5px; color: rgba(255, 255, 255, .45); font-variant-numeric: tabular-nums; }
.mobile-bar .btn { margin-left: auto; flex: 0 0 auto; }

/* ── 滚动揭示 ─────────────────────────────────────────── */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity .7s cubic-bezier(.22,1,.36,1), transform .7s cubic-bezier(.22,1,.36,1); }
.reveal.in { opacity: 1; transform: none; }

/* ══════════ 响应式 ══════════ */
@media (max-width: 1024px) {
  .hero-in { grid-template-columns: 1fr; gap: 46px; }
  .hero-visual { max-width: 520px; margin: 0 auto; width: 100%; }
  .app-mock { transform: none; }
  .pain-grid { grid-template-columns: repeat(2, 1fr); }
  .bento { grid-template-columns: repeat(2, 1fr); }
  .card.big { grid-column: span 2; }
  .skill-grid { grid-template-columns: repeat(2, 1fr); }
  .trust-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .model-notes { grid-template-columns: 1fr; }
  .dl-cards { grid-template-columns: 1fr; }
  .dl-foot { grid-template-columns: 1fr 1fr; gap: 24px; }
  .dl-share { grid-column: span 2; }
  .foot-in { grid-template-columns: 1fr; gap: 32px; }
  .sec { padding: 76px 0; }
}

@media (max-width: 768px) {
  .wrap { padding: 0 18px; }
  .nav { padding: 10px 0; }
  .nav-links {
    position: fixed; inset: 64px 14px auto 14px; flex-direction: column; gap: 0;
    background: #fff; border-radius: 20px; padding: 10px 6px;
    box-shadow: 0 30px 60px -24px rgba(0, 0, 0, .4), inset 0 0 0 1px var(--border);
    opacity: 0; visibility: hidden; transform: translateY(-10px); transition: .25s;
  }
  .nav-links.open { opacity: 1; visibility: visible; transform: none; }
  .nav-links a { color: var(--text) !important; padding: 13px 16px; font-size: 15px; border-radius: 12px; }
  .nav-links a:hover { background: var(--cream-2); }
  .burger { display: flex; }
  .nav-cta { display: none; }

  .hero { padding-top: 108px; }
  .hero h1 { font-size: clamp(34px, 9.4vw, 46px); }
  .hero .lead { font-size: 15px; }
  .hero-cta { flex-direction: column; align-items: stretch; }
  .hero-cta .btn { width: 100%; }
  .statbar { grid-template-columns: repeat(3, 1fr); gap: 16px 0; padding: 18px 6px; }
  .stat:nth-child(3n+1) { box-shadow: none; }
  .stat:nth-child(n+4) { padding-top: 14px; }
  .float-tag { display: none; }

  .sec { padding: 64px 0; }
  .sec-head { margin-bottom: 36px; }
  .pain-grid { grid-template-columns: 1fr; }
  .bento { grid-template-columns: 1fr; }
  .card.big { grid-column: span 1; }
  .skill-grid { grid-template-columns: 1fr; }
  .trust-grid { grid-template-columns: 1fr; }
  .table-hint { display: block; }
  .cmp { font-size: 13.5px; }
  .cmp th, .cmp td { padding: 13px 15px; }

  .dl-panel { padding: 40px 20px 30px; border-radius: 26px; }
  .dl-foot { grid-template-columns: 1fr; }
  .dl-share { grid-column: span 1; }
  .qa summary { padding: 17px 52px 17px 18px; font-size: 15px; }
  .qa-body { padding: 0 18px 18px; font-size: 14px; }
  .foot-cols { grid-template-columns: 1fr 1fr; }
  .final { padding: 72px 0 88px; }
  .mobile-bar { display: flex; }
  body { padding-bottom: 0; }
}

@media (max-width: 480px) {
  .brand { font-size: 15.5px; }
  .brand img { width: 30px; height: 30px; }
  .hero h1 { letter-spacing: -.03em; }
  .stat b { font-size: 19px; }
  .stat span { font-size: 11px; }
  .foot-cols { grid-template-columns: 1fr; }
  .btn-xl { padding: 17px 26px; font-size: 16px; width: 100%; }
  .chips { gap: 8px; }
  .chip { font-size: 12.5px; padding: 9px 15px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .float-tag { animation: none; }
  * { transition-duration: .01ms !important; }
}