/* 视觉基准：CapCut 模板库（浅色、9:16 圆角卡、左下角热度、标题在卡片下方、下划线标签） */
:root {
  --bg: #ffffff; --soft: #f5f6f8; --card: #f1f2f4; --line: #e8e9ec; --text: #16181d; --text2: #3b3e46; --muted: #80838c;
  --accent: #ff2d55; --accent-press: #e6194a; --accent-soft: #fff0f3; --ok: #12b76a; --focus: #2f6bff;
  --r: 12px; --r-lg: 20px;
  --shadow: 0 1px 2px rgba(16,24,40,.06), 0 1px 3px rgba(16,24,40,.08);
  --shadow-lg: 0 12px 32px rgba(16,24,40,.14);
  --ease: cubic-bezier(.2,.8,.2,1);
  --top-h: 56px;
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--text); font: 15px/1.5 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--top-h) + 52px); }
a { color: inherit; }
button { font: inherit; }
[hidden] { display: none !important; }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }

/* 顶栏 */
.top { position: sticky; top: 0; z-index: 10; height: var(--top-h); display: flex; justify-content: space-between; align-items: center; padding: 0 16px; padding-top: env(safe-area-inset-top); background: rgba(255,255,255,.9); backdrop-filter: saturate(180%) blur(12px); -webkit-backdrop-filter: saturate(180%) blur(12px); }
.brand { text-decoration: none; font-weight: 800; letter-spacing: -.03em; font-size: 20px; display: inline-flex; align-items: center; gap: 8px; }
.logo { display: inline-grid; place-items: center; width: 26px; height: 26px; border-radius: 8px; font-size: 11px; color: #fff; background: var(--text); }
.top-cta { text-decoration: none; font-weight: 600; font-size: 14px; padding: 8px 16px; border-radius: 999px; color: #fff; background: var(--text); transition: background .15s; }
.top-cta:hover { background: #000; }

main, .foot { max-width: 1320px; margin: 0 auto; padding: 0 16px; }
@media (min-width: 900px) { main, .foot { padding: 0 32px; } }

/* 首屏 */
.hero { text-align: center; padding: 20px 0 8px; }
@media (min-width: 900px) { .hero { padding: 48px 0 16px; } }
.hero h1 { font-size: clamp(30px, 8.4vw, 60px); line-height: 1.05; letter-spacing: -.04em; font-weight: 800; margin: 0 auto 12px; max-width: 760px; }
.grad { color: var(--accent); }
.sub { color: var(--muted); max-width: 520px; margin: 0 auto 16px; font-size: 16px; line-height: 1.55; }
.flow { list-style: none; display: flex; justify-content: center; align-items: center; gap: 4px; padding: 0; margin: 0 0 16px; font-size: 13px; font-weight: 600; color: var(--text2); flex-wrap: wrap; }
.flow li { display: inline-flex; align-items: center; gap: 6px; }
.flow li + li::before { content: ""; width: 16px; height: 1px; background: #c9cbd1; margin-right: 4px; }
.flow li span { display: inline-grid; place-items: center; width: 20px; height: 20px; border-radius: 50%; background: var(--text); color: #fff; font-size: 11px; }
.proof { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; margin: 0 0 18px; }
.proof-chip { display: inline-flex; align-items: center; gap: 6px; text-decoration: none; font-size: 13px; padding: 6px 12px 6px 8px; border-radius: 999px; background: var(--soft); color: var(--text2); transition: background .15s; }
.proof-chip:hover { background: var(--card); }
.proof-chip b { color: var(--accent); font-weight: 700; }
.proof-chip .t { max-width: 150px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.hero-cta { margin: 0 auto; }
.trust { list-style: none; display: flex; flex-wrap: wrap; justify-content: center; gap: 4px 16px; padding: 0; margin: 14px 0 0; color: var(--muted); font-size: 13px; }
.trust li { white-space: nowrap; }
.micro { color: var(--muted); font-size: 12.5px; margin: 10px 0 0; }
.center { text-align: center; }
.muted { color: var(--muted); }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; border: 0; border-radius: 999px; padding: 12px 22px; font-weight: 700; color: #fff; background: var(--accent); text-decoration: none; cursor: pointer; -webkit-tap-highlight-color: transparent; transition: background .15s, transform .1s var(--ease), box-shadow .15s; box-shadow: 0 6px 16px rgba(255,45,85,.25); }
.btn:hover { background: var(--accent-press); }
.btn:active { transform: scale(.97); }
.btn.big { padding: 15px 30px; font-size: 16px; }
.btn.full { width: 100%; }
.btn.ghost { background: var(--soft); color: var(--text); box-shadow: none; }
.btn.ghost:hover { background: var(--card); }
.btn:disabled { opacity: .6; cursor: wait; }

.block { padding: 20px 0; }
.block h2 { font-size: 20px; letter-spacing: -.02em; margin: 0 0 14px; font-weight: 700; }
@media (min-width: 900px) { .block h2 { font-size: 24px; } }
.row-head { display: flex; justify-content: space-between; align-items: baseline; }

/* 热门横滑 */
.rail { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
@media (min-width: 720px) { .rail { grid-template-columns: repeat(4, 1fr); gap: 16px; } }
.rail-card { min-width: 0; }

/* 分类标签：吸顶 + 下划线滑动 */
.tabs { position: sticky; top: var(--top-h); z-index: 8; display: flex; gap: 24px; overflow-x: auto; margin: 0 -16px 16px; padding: 0 16px; background: rgba(255,255,255,.94); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); border-bottom: 1px solid var(--line); scrollbar-width: none; }
@media (min-width: 900px) { .tabs { margin: 0 -32px 20px; padding: 0 32px; gap: 32px; } }
.tabs::-webkit-scrollbar { display: none; }
.tab { position: relative; flex: none; border: 0; background: none; color: var(--muted); font-size: 16px; font-weight: 600; padding: 14px 0 12px; cursor: pointer; transition: color .2s; -webkit-tap-highlight-color: transparent; }
@media (min-width: 900px) { .tab { font-size: 18px; } }
.tab:hover { color: var(--text2); }
.tab.on { color: var(--text); }
.tabs .ink { position: absolute; left: 0; bottom: 0; height: 3px; width: 0; border-radius: 3px 3px 0 0; background: var(--accent); transition: transform .3s var(--ease), width .3s var(--ease); pointer-events: none; }
.tabs { position: sticky; } /* .ink 以标签栏为定位容器 */

/* 模板卡片 */
.grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px 10px; }
@media (min-width: 600px) { .grid { grid-template-columns: repeat(3, 1fr); gap: 24px 14px; } }
@media (min-width: 900px) { .grid { grid-template-columns: repeat(4, 1fr); gap: 28px 16px; } }
@media (min-width: 1100px) { .grid { grid-template-columns: repeat(5, 1fr); } }
@media (min-width: 1280px) { .grid { grid-template-columns: repeat(6, 1fr); } }
.card { display: block; text-decoration: none; color: inherit; cursor: pointer; -webkit-tap-highlight-color: transparent; }
.thumb { position: relative; aspect-ratio: 9 / 16; border-radius: var(--r); overflow: hidden; background: var(--card); transform: translateZ(0); transition: transform .2s var(--ease), box-shadow .2s var(--ease); }
.card:hover .thumb { box-shadow: var(--shadow-lg); transform: translateY(-2px); }
.card:active .thumb { transform: scale(.98); box-shadow: none; }
.thumb > .ph, .thumb > img, .thumb > video { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.thumb > .ph { display: grid; place-items: center; font-size: 40px; background: linear-gradient(100deg, #eceef1 30%, #f7f8fa 50%, #eceef1 70%) 0 0 / 250% 100%; animation: shimmer 1.3s linear infinite; }
.thumb > .ph span { opacity: .35; filter: grayscale(.3); }
.card.loaded .thumb > .ph { animation: none; }
.thumb > video { opacity: 0; transition: opacity .35s; }
.card.playing .thumb > video { opacity: 1; }
.card:hover .thumb > img, .card:hover .thumb > video { transform: scale(1.03); }
.thumb > img, .thumb > video { transition: opacity .35s, transform .4s var(--ease); }
.badges { position: absolute; top: 8px; left: 8px; right: 8px; display: flex; gap: 4px; flex-wrap: wrap; }
.tag { font-size: 11px; font-weight: 700; letter-spacing: .01em; padding: 3px 8px; border-radius: 6px; color: #fff; background: rgba(0,0,0,.45); backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px); }
.tag.hot { background: var(--accent); }
.stat { position: absolute; left: 0; right: 0; bottom: 0; display: flex; align-items: center; gap: 4px; padding: 28px 8px 8px; font-size: 12px; font-weight: 600; color: #fff; background: linear-gradient(transparent, rgba(0,0,0,.5)); text-shadow: 0 1px 2px rgba(0,0,0,.35); }
.stat i { font-style: normal; }
.use { position: absolute; right: 8px; bottom: 8px; font-size: 12px; font-weight: 700; padding: 6px 10px; border-radius: 999px; background: #fff; color: var(--text); opacity: 0; transform: translateY(4px); transition: opacity .2s, transform .2s var(--ease); }
@media (hover: hover) { .card:hover .use { opacity: 1; transform: none; } }
.cap { padding: 8px 2px 0; }
.cap b { display: block; font-size: 14px; font-weight: 600; line-height: 1.3; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.cap small { display: block; font-size: 12px; color: var(--muted); margin-top: 1px; }
.empty { padding: 24px 0; }
.soon { margin-top: 28px; }
.soon h3 { font-size: 13px; color: var(--muted); margin: 0 0 8px; font-weight: 600; text-transform: uppercase; letter-spacing: .06em; }
.soon-list { display: flex; flex-wrap: wrap; gap: 6px; }
.soon-chip { font-size: 13px; padding: 5px 10px; border-radius: 999px; background: var(--soft); color: var(--muted); }
@keyframes shimmer { to { background-position: -250% 0; } }

.steps ol { margin: 0; padding: 0; list-style: none; counter-reset: s; display: grid; gap: 10px; }
@media (min-width: 900px) { .steps ol { grid-template-columns: repeat(3, 1fr); gap: 16px; } }
.steps li { counter-increment: s; background: var(--soft); border-radius: var(--r); padding: 16px; color: var(--muted); }
.steps li::before { content: counter(s); display: inline-grid; place-items: center; width: 24px; height: 24px; border-radius: 50%; background: var(--text); color: #fff; font-size: 12px; font-weight: 700; margin-bottom: 8px; }
.steps b { display: block; color: var(--text); }
.faq { max-width: 760px; }
.faq details { border-bottom: 1px solid var(--line); padding: 14px 0; }
.faq summary { font-weight: 600; cursor: pointer; list-style: none; display: flex; justify-content: space-between; gap: 12px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--muted); font-weight: 400; font-size: 20px; line-height: 1; transition: transform .2s; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq p { color: var(--muted); margin: 8px 0 0; }

/* 下单面板 */
.sheet { position: fixed; inset: 0; z-index: 30; background: rgba(15,17,22,.5); display: flex; align-items: flex-end; justify-content: center; animation: fade .22s var(--ease); }
@media (min-width: 720px) { .sheet { align-items: center; } }
.sheet-card { position: relative; width: 100%; max-width: 440px; max-height: 96vh; max-height: 96dvh; overflow: auto; overscroll-behavior: contain; background: var(--bg); border-radius: var(--r-lg) var(--r-lg) 0 0; padding: 12px 16px max(18px, env(safe-area-inset-bottom)); box-shadow: var(--shadow-lg); animation: up .32s var(--ease); }
@media (min-width: 720px) { .sheet-card { border-radius: var(--r-lg); animation-name: pop; } }
.sheet.closing { animation: fade-out .22s var(--ease) forwards; }
.sheet.closing .sheet-card { animation: down .22s var(--ease) forwards; }
@keyframes fade { from { opacity: 0; } }
@keyframes fade-out { to { opacity: 0; } }
@keyframes up { from { transform: translateY(100%); } }
@keyframes down { to { transform: translateY(100%); } }
@keyframes pop { from { transform: scale(.96); opacity: 0; } }
.s-media { position: relative; }
.sheet-card video { display: block; width: 100%; height: 34vh; height: 34dvh; object-fit: cover; border-radius: 14px; background: var(--card); }
.s-stat { position: absolute; left: 10px; bottom: 10px; font-size: 12px; font-weight: 700; padding: 4px 10px; border-radius: 999px; color: #fff; background: rgba(0,0,0,.5); backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px); }
.sheet-card h3 { margin: 12px 0 0; font-size: 20px; line-height: 1.25; letter-spacing: -.02em; }
#s-sub { margin: 2px 0 0; font-size: 14px; }
.s-steps { font-size: 13px; color: var(--muted); margin: 8px 0 0; }
.s-steps b { color: var(--text); }
.close { position: absolute; top: 20px; right: 24px; z-index: 2; width: 32px; height: 32px; border-radius: 50%; border: 0; background: rgba(0,0,0,.45); color: #fff; font-size: 20px; line-height: 1; cursor: pointer; backdrop-filter: blur(6px); }
.upload { display: block; margin: 12px 0 8px; border: 1.5px dashed #c9ccd3; border-radius: 14px; cursor: pointer; background: var(--soft); transition: border-color .15s, background .15s; }
.upload:hover { border-color: var(--accent); background: var(--accent-soft); }
.upload.done { border-style: solid; border-color: var(--ok); background: #f0fbf5; }
.upload-inner { display: flex; align-items: center; gap: 12px; padding: 12px 14px; }
.upload-icon { width: 44px; height: 44px; flex: none; display: grid; place-items: center; border-radius: 12px; background: var(--accent); color: #fff; font-size: 22px; }
.upload img { width: 52px; height: 66px; object-fit: cover; border-radius: 8px; flex: none; }
.consent { display: flex; gap: 8px; align-items: flex-start; font-size: 12px; color: var(--muted); margin: 6px 0 12px; padding: 6px; border-radius: 10px; transition: background .15s; }
.consent.need { background: #fff1f1; color: var(--text); }
.consent input { margin-top: 1px; width: 18px; height: 18px; flex: none; accent-color: var(--accent); }
.checks { list-style: none; padding: 0; margin: 12px 0 0; display: grid; gap: 4px; font-size: 13px; color: var(--text2); }
.checks li::before { content: "✓"; color: var(--ok); font-weight: 800; margin-right: 8px; }
.paddle { margin-top: 10px; }
.error { color: #d92d20; font-size: 13.5px; text-align: center; margin: 10px 0 0; }

/* 结果页 */
.result { max-width: 560px; margin: 0 auto; }
.result video { width: 100%; max-width: 400px; display: block; margin: 0 auto 14px; border-radius: 16px; background: var(--card); box-shadow: var(--shadow-lg); }
.result .actions { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }
.progress { height: 8px; background: var(--soft); border-radius: 999px; overflow: hidden; margin: 18px 0 10px; }
.progress > i { display: block; height: 100%; width: 5%; background: var(--accent); transition: width .6s var(--ease); }
.status-box { text-align: center; padding: 30px 0; }
.status-box .big-emoji { font-size: 54px; }
.mine { display: flex; gap: 8px; overflow-x: auto; scrollbar-width: none; }
.mine a { flex: none; text-decoration: none; padding: 10px 14px; border-radius: 12px; background: var(--soft); font-size: 14px; font-weight: 500; }

.foot { text-align: center; color: var(--muted); font-size: 13px; padding: 28px 16px 40px; border-top: 1px solid var(--line); margin-top: 24px; }
.foot a { color: var(--text2); text-decoration: none; }
.legal { max-width: 760px; margin: 0 auto; padding: 24px 16px 60px; color: var(--text2); }
.legal h1 { font-size: 28px; color: var(--text); letter-spacing: -.02em; }
.legal h2 { font-size: 18px; margin-top: 26px; color: var(--text); }

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