/* ==========================================================
   炼妖壶官网样式
   主色取自应用图标：靛蓝（湖面）+ 琥珀（天空）+ 雪白（山峰）
   ========================================================== */
:root {
    --indigo-900: #141a52;
    --indigo-800: #1e2570;
    --indigo-700: #283593;
    --indigo-600: #3949ab;
    --indigo-500: #3f51b5;
    --indigo-100: #e8eaf6;
    --indigo-50: #f3f4fc;
    --amber-500: #ffa726;
    --amber-400: #ffb74d;
    --amber-300: #ffcc80;
    --ink: #161a33;
    --ink-2: #4a5072;
    --ink-3: #8a8fae;
    --line: #e6e8f3;
    --bg: #ffffff;
    --bg-soft: #f6f7fc;
    --radius: 20px;
    --shadow: 0 10px 30px -12px rgba(30, 37, 112, .25);
    --shadow-lg: 0 30px 60px -20px rgba(20, 26, 82, .45);
    --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "HarmonyOS Sans SC", "MiSans", "Microsoft YaHei", "Segoe UI", "Helvetica Neue", sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; -webkit-text-size-adjust: 100%; }
body { font-family: var(--font); color: var(--ink); background: var(--bg); line-height: 1.65; -webkit-font-smoothing: antialiased; overflow-x: hidden; }
a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }
.wrap { width: 100%; max-width: 1180px; margin: 0 auto; padding: 0 24px; }
.wrap.narrow { max-width: 820px; }

/* ---------- 按钮 ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 10px; border: 0; cursor: pointer; font: inherit; font-weight: 600; border-radius: 999px; transition: transform .2s, box-shadow .2s, background .2s, color .2s; white-space: nowrap; }
.btn svg { width: 20px; height: 20px; }
.btn-sm { padding: 8px 18px; font-size: 14px; }
.btn-lg { padding: 15px 30px; font-size: 17px; }
.btn-amber { background: linear-gradient(135deg, #ffc15e, #ff9a1f); color: #3b2300; box-shadow: 0 10px 24px -8px rgba(255, 154, 31, .7); }
.btn-amber:hover { transform: translateY(-2px); box-shadow: 0 16px 30px -10px rgba(255, 154, 31, .85); }
.btn-amber.disabled { opacity: .7; cursor: default; transform: none; }
.btn-glass { background: rgba(255, 255, 255, .12); color: #fff; border: 1px solid rgba(255, 255, 255, .28); backdrop-filter: blur(8px); }
.btn-glass:hover { background: rgba(255, 255, 255, .22); }
.btn-line { border: 1px solid var(--line); color: var(--indigo-600); background: #fff; }
.btn-line:hover { border-color: var(--indigo-500); background: var(--indigo-50); }

/* ---------- 公告 ---------- */
.announce { background: linear-gradient(90deg, #ffb74d, #ff9a1f); color: #3b2300; text-align: center; font-size: 14px; font-weight: 500; padding: 9px 16px; position: relative; z-index: 60; }
.announce .dot { display: inline-block; width: 7px; height: 7px; border-radius: 50%; background: #3b2300; margin-right: 8px; vertical-align: 2px; animation: pulse 1.6s infinite; }
@keyframes pulse { 50% { opacity: .25; } }

/* ---------- 导航 ---------- */
.nav { position: sticky; top: 0; z-index: 50; transition: background .3s, box-shadow .3s; }
.nav-inner { display: flex; align-items: center; gap: 24px; height: 68px; }
.nav .brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 20px; color: #fff; letter-spacing: 1px; }
.nav .brand img { width: 36px; height: 36px; border-radius: 10px; box-shadow: 0 4px 12px rgba(0, 0, 0, .2); }
.nav-links { display: flex; gap: 6px; margin-left: auto; }
.nav-links a { color: rgba(255, 255, 255, .82); padding: 8px 14px; border-radius: 999px; font-size: 15px; transition: background .2s, color .2s; }
.nav-links a:hover { color: #fff; background: rgba(255, 255, 255, .12); }
.nav-toggle { display: none; }
.nav.scrolled { background: rgba(20, 26, 82, .82); backdrop-filter: saturate(160%) blur(14px); -webkit-backdrop-filter: saturate(160%) blur(14px); box-shadow: 0 6px 24px -10px rgba(0, 0, 0, .4); }

/* ---------- 首屏 ---------- */
.hero { position: relative; margin-top: -68px; padding: 140px 0 150px; color: #fff; overflow: hidden;
    background: radial-gradient(120% 90% at 80% 0%, #3d4bb8 0%, transparent 60%), linear-gradient(170deg, #141a52 0%, #232a7a 45%, #3949ab 100%); }
.hero-sky { position: absolute; inset: 0; pointer-events: none; }
.sun { position: absolute; width: 520px; height: 520px; right: -120px; top: -140px; border-radius: 50%;
    background: radial-gradient(circle, rgba(255, 183, 77, .55) 0%, rgba(255, 167, 38, .18) 40%, transparent 70%); filter: blur(10px); animation: glow 8s ease-in-out infinite; }
@keyframes glow { 50% { transform: scale(1.08); opacity: .8; } }
.stars { position: absolute; inset: 0; opacity: .55;
    background-image: radial-gradient(1.5px 1.5px at 10% 20%, #fff 50%, transparent 51%), radial-gradient(1px 1px at 30% 70%, #fff 50%, transparent 51%), radial-gradient(1.2px 1.2px at 55% 15%, #fff 50%, transparent 51%), radial-gradient(1px 1px at 70% 45%, #fff 50%, transparent 51%), radial-gradient(1.4px 1.4px at 85% 75%, #fff 50%, transparent 51%), radial-gradient(1px 1px at 20% 50%, #fff 50%, transparent 51%), radial-gradient(1px 1px at 45% 40%, #fff 50%, transparent 51%), radial-gradient(1.3px 1.3px at 92% 30%, #fff 50%, transparent 51%); }
.cloud { position: absolute; height: 34px; border-radius: 40px; background: rgba(255, 255, 255, .09); filter: blur(1px); animation: drift linear infinite; }
.cloud::before, .cloud::after { content: ""; position: absolute; background: inherit; border-radius: 50%; }
.cloud::before { width: 50%; height: 160%; left: 15%; top: -70%; }
.cloud::after { width: 34%; height: 120%; right: 18%; top: -45%; }
.c1 { width: 170px; top: 22%; left: -10%; animation-duration: 60s; }
.c2 { width: 120px; top: 48%; left: -20%; animation-duration: 85s; animation-delay: -30s; }
.c3 { width: 210px; top: 12%; left: -30%; animation-duration: 110s; animation-delay: -70s; }
@keyframes drift { to { transform: translateX(140vw); } }

.hero-grid { position: relative; display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center; }
.pill { display: inline-flex; gap: 4px; padding: 5px; border-radius: 999px; background: rgba(255, 255, 255, .08); border: 1px solid rgba(255, 255, 255, .16); margin-bottom: 26px; }
.pill span { font-size: 13px; padding: 4px 12px; border-radius: 999px; color: rgba(255, 255, 255, .9); }
.pill span:first-child { background: var(--amber-500); color: #3b2300; font-weight: 600; }
.hero h1 { font-size: clamp(38px, 5.4vw, 64px); line-height: 1.18; font-weight: 800; letter-spacing: 1px; }
.hero h1 em { font-style: normal; background: linear-gradient(120deg, #ffd08a, #ffa726 60%, #ff8a3d); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lead { margin-top: 22px; font-size: 18px; color: rgba(255, 255, 255, .78); max-width: 540px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 36px; }
.hero-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-top: 24px; font-size: 14px; color: rgba(255, 255, 255, .6); }
.hero-meta i { width: 3px; height: 3px; border-radius: 50%; background: rgba(255, 255, 255, .45); }

/* 手机样机 */
.hero-visual { position: relative; display: flex; justify-content: center; }
.phone { width: 300px; height: 631px; border-radius: 46px; padding: 12px; background: linear-gradient(160deg, #2b2f55, #0c0f2a); box-shadow: var(--shadow-lg), inset 0 0 0 2px rgba(255, 255, 255, .08); transform: rotate(-4deg); animation: float 7s ease-in-out infinite; }
@keyframes float { 50% { transform: rotate(-4deg) translateY(-14px); } }
.phone-screen { height: 100%; border-radius: 36px; overflow: hidden; background: #f3f3f6; }
.phone-screen img { width: 100%; height: 100%; object-fit: cover; object-position: top; }

.float { position: absolute; display: flex; align-items: center; gap: 12px; padding: 12px 18px 12px 12px; border-radius: 18px; background: rgba(255, 255, 255, .95); color: var(--ink); box-shadow: var(--shadow-lg); animation: float2 6s ease-in-out infinite; }
.float b { width: 38px; height: 38px; border-radius: 12px; display: grid; place-items: center; background: #e7f0ff; color: #3d7bff; font-size: 18px; }
.float b.g { background: #e6f8f1; color: #11a674; }
.float strong { display: block; font-size: 14px; }
.float small { font-size: 12px; color: var(--ink-3); }
.f1 { left: -40px; top: 46%; }
.f2 { right: -14px; bottom: 18%; animation-delay: -3s; }
@keyframes float2 { 50% { transform: translateY(-10px); } }

.mountains { position: absolute; left: 0; right: 0; bottom: -1px; width: 100%; height: 160px; }
.m1 { fill: rgba(255, 255, 255, .08); }
.m2 { fill: rgba(255, 255, 255, .16); }
.m3 { fill: #fff; }

/* ---------- 数据条 ---------- */
.stats { position: relative; z-index: 2; margin-top: -54px; display: grid; grid-template-columns: repeat(4, 1fr); background: #fff; border-radius: var(--radius); box-shadow: var(--shadow); border: 1px solid var(--line); }
.stats div { padding: 26px 20px; text-align: center; }
.stats div + div { border-left: 1px solid var(--line); }
.stats strong { display: block; font-size: 28px; font-weight: 800; color: var(--indigo-600); }
.stats span { font-size: 14px; color: var(--ink-3); }

/* ---------- 通用区块 ---------- */
.section { padding: 110px 0; }
.section-head { text-align: center; max-width: 680px; margin: 0 auto 56px; }
.eyebrow { display: inline-block; font-size: 13px; font-weight: 700; letter-spacing: 2px; color: var(--indigo-500); background: var(--indigo-50); padding: 5px 14px; border-radius: 999px; margin-bottom: 16px; }
.section-head h2 { font-size: clamp(28px, 3.6vw, 40px); line-height: 1.3; font-weight: 800; }
.section-head p { margin-top: 14px; color: var(--ink-2); font-size: 17px; }
.section-head.light .eyebrow { background: rgba(255, 255, 255, .12); color: var(--amber-300); }
.section-head.light h2 { color: #fff; }
.section-head.light p { color: rgba(255, 255, 255, .7); }

/* 功能卡片 */
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.feature { position: relative; padding: 32px 28px; border-radius: var(--radius); background: #fff; border: 1px solid var(--line); transition: transform .3s, box-shadow .3s, border-color .3s; overflow: hidden; }
.feature::after { content: ""; position: absolute; width: 160px; height: 160px; right: -60px; top: -60px; border-radius: 50%; background: radial-gradient(circle, rgba(255, 183, 77, .22), transparent 70%); opacity: 0; transition: opacity .3s; }
.feature:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: transparent; }
.feature:hover::after { opacity: 1; }
.f-icon { width: 54px; height: 54px; border-radius: 16px; display: grid; place-items: center; color: #fff; background: linear-gradient(140deg, var(--indigo-500), var(--indigo-800)); box-shadow: 0 10px 20px -8px rgba(57, 73, 171, .7); margin-bottom: 22px; }
.f-icon svg { width: 26px; height: 26px; }
.feature:nth-child(3n+2) .f-icon { background: linear-gradient(140deg, #ffc15e, #ff8a1f); box-shadow: 0 10px 20px -8px rgba(255, 138, 31, .7); }
.feature h3 { font-size: 19px; margin-bottom: 10px; }
.feature p { color: var(--ink-2); font-size: 15px; }

/* 原理 */
.how { background: var(--bg-soft); }
.spaces { display: grid; grid-template-columns: 1fr auto 1fr; align-items: stretch; gap: 0; }
.space { padding: 30px; border-radius: 26px; background: #fff; border: 1px solid var(--line); }
.space.island { background: linear-gradient(160deg, var(--indigo-700), var(--indigo-900)); color: #fff; border: 0; box-shadow: var(--shadow-lg); }
.space-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 24px; }
.chip { font-weight: 700; font-size: 15px; padding: 6px 14px; border-radius: 999px; background: var(--indigo-50); color: var(--indigo-600); }
.island .chip { background: rgba(255, 183, 77, .18); color: var(--amber-300); }
.space-top small { color: var(--ink-3); font-size: 13px; }
.island .space-top small { color: rgba(255, 255, 255, .55); }
.apps { display: grid; grid-template-columns: repeat(6, 1fr); gap: 10px; margin-bottom: 24px; }
.apps i { aspect-ratio: 1; border-radius: 28%; background: var(--c); position: relative; box-shadow: 0 6px 14px -8px var(--c); }
.apps i.ice { filter: grayscale(.85) brightness(1.15); opacity: .55; }
.apps i.ice::after { content: "❄"; position: absolute; inset: 0; display: grid; place-items: center; color: #fff; font-size: 14px; font-style: normal; }
.space ul { list-style: none; display: grid; gap: 10px; }
.space li { position: relative; padding-left: 26px; font-size: 15px; color: var(--ink-2); }
.island li { color: rgba(255, 255, 255, .82); }
.space li::before { content: ""; position: absolute; left: 0; top: 7px; width: 14px; height: 14px; border-radius: 50%; background: var(--indigo-100); box-shadow: inset 0 0 0 4px var(--indigo-500); }
.island li::before { background: transparent; box-shadow: inset 0 0 0 4px var(--amber-500); }
.wall { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 10px; padding: 0 22px; position: relative; }
.wall::before { content: ""; position: absolute; top: 10%; bottom: 10%; width: 2px; background: repeating-linear-gradient(to bottom, var(--indigo-500) 0 8px, transparent 8px 16px); opacity: .35; }
.wall span { position: relative; width: 56px; height: 56px; border-radius: 50%; display: grid; place-items: center; background: #fff; color: var(--indigo-500); box-shadow: var(--shadow); }
.wall span svg { width: 26px; height: 26px; }
.wall em { position: relative; font-style: normal; font-size: 12px; font-weight: 700; color: var(--indigo-500); background: var(--bg-soft); padding: 2px 6px; writing-mode: vertical-rl; letter-spacing: 3px; }

.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 56px; counter-reset: s; }
.step { position: relative; padding: 28px; border-radius: var(--radius); background: #fff; border: 1px solid var(--line); }
.step b { display: inline-grid; place-items: center; width: 40px; height: 40px; border-radius: 12px; font-size: 18px; color: var(--indigo-600); background: var(--indigo-50); margin-bottom: 16px; }
.step h4 { font-size: 18px; margin-bottom: 6px; }
.step p { color: var(--ink-2); font-size: 15px; }

/* 下载 */
.download { position: relative; overflow: hidden; background: radial-gradient(80% 70% at 100% 0%, rgba(255, 167, 38, .22), transparent 60%), linear-gradient(160deg, var(--indigo-900), var(--indigo-700)); }
.dl-card { position: relative; display: grid; grid-template-columns: 1fr 260px; background: #fff; border-radius: 28px; box-shadow: var(--shadow-lg); overflow: hidden; }
.dl-main { padding: 40px; min-width: 0; }
.dl-app { display: flex; align-items: center; gap: 20px; }
.dl-app img { width: 84px; height: 84px; border-radius: 22px; box-shadow: 0 12px 24px -10px rgba(0, 0, 0, .35); }
.dl-app h3 { font-size: 26px; display: flex; align-items: center; flex-wrap: wrap; gap: 10px; }
.ver { font-size: 14px; font-weight: 700; padding: 3px 12px; border-radius: 999px; background: #fff3e0; color: #e07b00; }
.dl-app p { color: var(--ink-3); font-size: 15px; margin-top: 4px; }
.new-tag { display: inline-flex; align-items: center; gap: 4px; font-size: 12px; font-weight: 700; line-height: 1; padding: 5px 10px; border-radius: 999px; color: #fff; background: linear-gradient(135deg, #22c39a, #10a37f); box-shadow: 0 4px 10px -4px rgba(16, 163, 127, .7); letter-spacing: 1px; }
.new-tag::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: #fff; animation: pulse 1.6s infinite; }
.history .new-tag { margin-right: 10px; vertical-align: 2px; }
.latest-note { display: flex; gap: 10px; align-items: flex-start; margin-bottom: 18px; padding: 12px 16px; border-radius: 14px; background: #e9f8f2; color: #0b7a52; font-size: 14px; }
.latest-note b { flex: none; width: 20px; height: 20px; border-radius: 50%; display: grid; place-items: center; background: #10a37f; color: #fff; font-size: 12px; margin-top: 1px; }
.dl-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 18px; margin: 30px 0; }
.dl-count { font-size: 14px; color: var(--ink-3); }
.changelog { padding: 20px 22px; border-radius: 16px; background: var(--bg-soft); }
.changelog h4 { font-size: 14px; color: var(--indigo-600); margin-bottom: 8px; }
.log { font-size: 15px; color: var(--ink-2); max-height: 220px; overflow: auto; }
.hash { display: flex; align-items: center; gap: 10px; margin-top: 18px; font-size: 12px; color: var(--ink-3); min-width: 0; }
.hash span { flex: none; font-weight: 700; }
.hash code { font-family: ui-monospace, Menlo, Consolas, monospace; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; cursor: pointer; padding: 4px 8px; border-radius: 8px; background: var(--bg-soft); }
.hash code:hover { color: var(--indigo-600); }
.dl-qr { display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 30px; background: linear-gradient(180deg, var(--indigo-50), #fff); border-left: 1px dashed var(--line); text-align: center; }
.qr { width: 170px; height: 170px; padding: 12px; background: #fff; border-radius: 18px; box-shadow: var(--shadow); }
.qr img, .qr svg { width: 100%; height: 100%; }
.dl-qr p { margin-top: 16px; font-weight: 700; }
.dl-qr small { color: var(--ink-3); font-size: 12px; }
.dl-card.empty { display: block; text-align: center; padding: 60px 30px; }
.dl-card.empty img { width: 84px; margin: 0 auto 18px; border-radius: 22px; }
.dl-card.empty p { color: var(--ink-3); margin-top: 6px; }
.history { margin-top: 20px; background: rgba(255, 255, 255, .08); border: 1px solid rgba(255, 255, 255, .16); border-radius: 20px; color: #fff; }
.history summary { cursor: pointer; padding: 18px 26px; font-weight: 600; list-style: none; display: flex; justify-content: space-between; }
.history summary::after { content: "展开 ▾"; font-size: 13px; opacity: .6; font-weight: 400; }
.history[open] summary::after { content: "收起 ▴"; }
.history ul { list-style: none; padding: 0 16px 16px; display: grid; gap: 10px; }
.history li { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; padding: 16px 18px; border-radius: 14px; background: #fff; color: var(--ink); }
.history li strong { margin-right: 10px; }
.history li span { font-size: 13px; color: var(--ink-3); }
.history li p { font-size: 14px; color: var(--ink-2); margin-top: 4px; }
.dl-tip { margin-top: 26px; text-align: center; font-size: 14px; color: rgba(255, 255, 255, .6); }

/* FAQ */
.faq { display: grid; gap: 14px; }
.faq details { border-radius: 18px; border: 1px solid var(--line); background: #fff; transition: box-shadow .3s, border-color .3s; }
.faq details[open] { box-shadow: var(--shadow); border-color: transparent; }
.faq summary { list-style: none; cursor: pointer; padding: 22px 26px; font-weight: 600; font-size: 17px; display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.faq summary::-webkit-details-marker, .history summary::-webkit-details-marker { display: none; }
.faq summary i { position: relative; flex: none; width: 28px; height: 28px; border-radius: 50%; background: var(--indigo-50); transition: transform .3s, background .3s; }
.faq summary i::before, .faq summary i::after { content: ""; position: absolute; left: 50%; top: 50%; width: 12px; height: 2px; background: var(--indigo-500); transform: translate(-50%, -50%); border-radius: 2px; }
.faq summary i::after { transform: translate(-50%, -50%) rotate(90deg); transition: transform .3s; }
.faq details[open] summary i { background: var(--amber-500); }
.faq details[open] summary i::before, .faq details[open] summary i::after { background: #3b2300; }
.faq details[open] summary i::after { transform: translate(-50%, -50%) rotate(0); }
.faq p { padding: 0 26px 22px; color: var(--ink-2); }

/* CTA */
.cta { margin-bottom: 90px; }
.cta-box { display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap; padding: 48px 56px; border-radius: 30px; color: #fff; position: relative; overflow: hidden;
    background: radial-gradient(60% 120% at 100% 100%, rgba(255, 167, 38, .45), transparent 60%), linear-gradient(130deg, var(--indigo-700), var(--indigo-900)); box-shadow: var(--shadow-lg); }
.cta-box h2 { font-size: clamp(24px, 3vw, 32px); }
.cta-box p { color: rgba(255, 255, 255, .7); margin-top: 6px; }

/* 页脚 */
.footer { background: #0f1440; color: rgba(255, 255, 255, .65); padding: 50px 0 28px; font-size: 14px; }
.foot-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 24px; padding-bottom: 28px; border-bottom: 1px solid rgba(255, 255, 255, .08); }
.foot-brand { display: flex; align-items: center; gap: 14px; }
.foot-brand img { width: 44px; border-radius: 12px; }
.foot-brand strong { display: block; color: #fff; font-size: 18px; }
.foot-links { display: flex; flex-wrap: wrap; gap: 26px; }
.foot-links a:hover { color: #fff; }
.foot-bottom { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; padding-top: 22px; font-size: 13px; color: rgba(255, 255, 255, .4); }
.foot-bottom a { margin-left: 16px; }
.foot-bottom a:hover { color: #fff; }

/* 微信遮罩 & 提示 */
.wx-mask { position: fixed; inset: 0; z-index: 100; background: rgba(8, 10, 30, .88); display: none; color: #fff; }
.wx-mask.show { display: block; }
.wx-arrow { position: absolute; right: 28px; top: 10px; font-size: 64px; color: var(--amber-400); animation: float2 1.6s infinite; }
.wx-tip { position: absolute; right: 30px; top: 100px; text-align: right; font-size: 20px; line-height: 2; }
.wx-tip b { color: var(--amber-400); }
.wx-tip small { display: block; font-size: 14px; opacity: .6; }
.toast { position: fixed; left: 50%; bottom: 40px; transform: translate(-50%, 20px); z-index: 120; background: rgba(20, 26, 82, .95); color: #fff; padding: 12px 22px; border-radius: 999px; font-size: 14px; opacity: 0; pointer-events: none; transition: .3s; }
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* 滚动渐显 */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .8s cubic-bezier(.2, .7, .2, 1), transform .8s cubic-bezier(.2, .7, .2, 1); transition-delay: var(--d, 0ms); }
.reveal.delay { --d: 150ms; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation: none !important; transition: none !important; }
    .reveal { opacity: 1; transform: none; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1000px) {
    .hero-grid { grid-template-columns: 1fr; text-align: center; }
    .lead { margin-left: auto; margin-right: auto; }
    .hero-actions, .hero-meta { justify-content: center; }
    .hero-visual { margin-top: 30px; }
    .features { grid-template-columns: repeat(2, 1fr); }
    .spaces { grid-template-columns: 1fr; gap: 18px; }
    .wall { flex-direction: row; padding: 4px 0; }
    .wall::before { top: 50%; bottom: auto; left: 10%; right: 10%; width: auto; height: 2px; background: repeating-linear-gradient(to right, var(--indigo-500) 0 8px, transparent 8px 16px); }
    .wall em { writing-mode: horizontal-tb; letter-spacing: 1px; }
    .dl-card { grid-template-columns: 1fr; }
    .dl-qr { display: none; }
}
@media (max-width: 760px) {
    .wrap { padding: 0 16px; }
    .nav-inner { height: 60px; gap: 12px; }
    .hero { margin-top: -60px; padding: 110px 0 120px; }
    .nav-cta { margin-left: auto; }
    .nav-toggle { display: grid; gap: 5px; width: 40px; height: 40px; place-content: center; background: rgba(255, 255, 255, .12); border: 0; border-radius: 12px; cursor: pointer; }
    .nav-toggle span { width: 18px; height: 2px; background: #fff; border-radius: 2px; transition: .3s; }
    .nav.open .nav-toggle span:first-child { transform: translateY(3.5px) rotate(45deg); }
    .nav.open .nav-toggle span:last-child { transform: translateY(-3.5px) rotate(-45deg); }
    .nav-links { position: absolute; top: 100%; left: 12px; right: 12px; flex-direction: column; padding: 10px; border-radius: 18px; background: rgba(20, 26, 82, .97); box-shadow: var(--shadow-lg); opacity: 0; visibility: hidden; transform: translateY(-8px); transition: .25s; }
    .nav.open .nav-links { opacity: 1; visibility: visible; transform: none; }
    .nav-links a { padding: 12px 16px; }
    .lead { font-size: 16px; }
    .btn-lg { padding: 14px 24px; font-size: 16px; }
    .phone { width: 260px; height: 543px; }
    .float { padding: 9px 14px 9px 9px; }
    .float b { width: 32px; height: 32px; }
    .f1 { left: 0; top: 12%; }
    .f2 { right: 0; bottom: 10%; }
    .stats { grid-template-columns: repeat(2, 1fr); margin-top: -40px; }
    .stats div:nth-child(3) { border-left: 0; }
    .stats div:nth-child(n+3) { border-top: 1px solid var(--line); }
    .stats strong { font-size: 22px; }
    .section { padding: 76px 0; }
    .section-head { margin-bottom: 40px; }
    .features, .steps { grid-template-columns: 1fr; }
    .dl-main { padding: 26px 20px; }
    .dl-app img { width: 64px; height: 64px; border-radius: 18px; }
    .dl-app h3 { font-size: 21px; }
    .dl-actions .btn { width: 100%; }
    .cta-box { padding: 34px 26px; }
    .cta-box .btn { width: 100%; }
    .foot-bottom a { margin: 0 16px 0 0; }
}
@media (max-width: 380px) {
    .float { display: none; }
}