/* SceneCut 官网样式（10-19 改版：熔岩配色——黑曜石底 + 红橙渐变强调，和 logo 的青色互补）。无依赖、无外部字体。 */

:root {
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", Inter, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  --bg: #08080a;
  --bg-2: #0d0d10;
  --s1: #111114;
  --s2: #17171b;
  --s3: #1e1e23;
  --line: color-mix(in srgb, var(--fg) 8%, transparent);
  --line-2: color-mix(in srgb, var(--fg) 14%, transparent);
  --fg: #f5f5f7;
  --fg-2: #c9c9cf;
  --muted: #8e8e96;
  --muted-2: #7d7d86;
  --a1: #ff4d2e;
  --a2: #ff9a3c;
  --grad: linear-gradient(135deg, var(--a1), var(--a2));
  --tag: #ff7a45;
  --glow: rgba(255, 90, 46, .30);
  --ok: #4ade80;
  --bad: #f87171;
  --on: #0a0a0a;
  --shot-shadow: 0 30px 80px -36px rgba(0, 0, 0, .9);
  /* 使用帮助（help.css）沿用的老变量名 */
  --panel: var(--s1);
  --panel-2: var(--s2);
  --link: #ff9a6a;
  --tint-blue: rgba(255, 154, 60, .10);
  --tint-yellow: rgba(250, 204, 21, .12);
  --tint-green: rgba(74, 222, 128, .12);
  --r-sm: 8px;

  --wrap: 1200px;
  --pad: 48px;
  --r-md: 12px;
  --r-lg: 16px;
  --r-xl: 22px;
}

/* 浅色：跟系统走（data-theme 是人手动选的，优先） */
@media (prefers-color-scheme: light) { :root:not([data-theme="dark"]) { --bg: #fbfbfa; --bg-2: #f3f3f1; --s1: #ffffff; --s2: #f6f6f4; --s3: #ededea; --line: rgba(10, 10, 10, .08); --line-2: rgba(10, 10, 10, .14); --fg: #0b0b0c; --fg-2: #33333a; --muted: #5f5f67; --muted-2: #6a6a72; --tag: #e2461c; --glow: rgba(255, 90, 46, .16); --shot-shadow: 0 24px 60px -28px rgba(30, 20, 10, .28); color-scheme: light; } }
:root[data-theme="light"] { --bg: #fbfbfa; --bg-2: #f3f3f1; --s1: #ffffff; --s2: #f6f6f4; --s3: #ededea; --line: rgba(10, 10, 10, .08); --line-2: rgba(10, 10, 10, .14); --fg: #0b0b0c; --fg-2: #33333a; --muted: #5f5f67; --muted-2: #6a6a72; --tag: #e2461c; --glow: rgba(255, 90, 46, .16); --shot-shadow: 0 24px 60px -28px rgba(30, 20, 10, .28); color-scheme: light; }

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; color-scheme: dark; }
body { transition: background .3s ease, color .3s ease; }
body { margin: 0; background: var(--bg); color: var(--fg); font-family: var(--font); font-size: 16px; line-height: 1.6; -webkit-font-smoothing: antialiased; }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
p, h1, h2, h3, h4, ul, ol, figure { margin: 0; }
ul { padding: 0; list-style: none; }
button { font: inherit; }
[hidden] { display: none !important; }
::selection { background: rgba(255, 90, 46, .35); }
:focus-visible { outline: 2px solid var(--a2); outline-offset: 2px; border-radius: 6px; }

.skip { position: absolute; left: 16px; top: -60px; z-index: 100; padding: 8px 14px; border-radius: 8px; background: var(--fg); color: var(--on); text-decoration: none; }
.skip:focus { top: 12px; }
.grad { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* ---------- 按钮 ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; height: 42px; padding: 0 20px; border-radius: 999px; border: 1px solid transparent; font-size: .9375rem; font-weight: 600; text-decoration: none; cursor: pointer; white-space: nowrap; transition: filter .15s ease, background .15s ease, border-color .15s ease, transform .1s ease; }
.btn:active { transform: scale(.97); }
.btn--dark, .btn--primary { background: var(--grad); color: var(--on); box-shadow: 0 8px 28px -10px var(--glow); }
.btn--dark:hover, .btn--primary:hover { filter: brightness(1.08); }
.btn--light, .btn--ghost { background: color-mix(in srgb, var(--fg) 4%, transparent); color: var(--fg); border-color: var(--line-2); }
.btn--light:hover, .btn--ghost:hover { background: color-mix(in srgb, var(--fg) 9%, transparent); border-color: color-mix(in srgb, var(--fg) 24%, transparent); }
.btn--sm { height: 36px; padding: 0 16px; font-size: .875rem; }
.btn--lg { height: 50px; padding: 0 26px; font-size: 1rem; }
.btn[disabled] { opacity: .55; cursor: default; transform: none; }
.btn .arrow { width: 14px; height: 14px; }

/* ---------- 顶栏 ---------- */
.top { position: sticky; top: 0; z-index: 50; height: 64px; padding: 0 var(--pad); background: color-mix(in srgb, var(--bg) 78%, transparent); backdrop-filter: saturate(150%) blur(14px); -webkit-backdrop-filter: saturate(150%) blur(14px); border-bottom: 1px solid var(--line); }
.top__row { height: 100%; max-width: var(--wrap); margin: 0 auto; display: flex; align-items: center; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.0625rem; text-decoration: none; letter-spacing: -.01em; }
.brand__mark { flex: none; border-radius: 7px; }
.top__nav { display: flex; align-items: center; gap: 2px; }
.top__nav a { display: inline-flex; align-items: center; height: 34px; padding: 0 12px; border-radius: 8px; font-size: .9rem; color: var(--muted); text-decoration: none; transition: color .15s ease, background .15s ease; }
.top__nav a:hover, .top__nav a.is-active { color: var(--fg); background: color-mix(in srgb, var(--fg) 6%, transparent); }
.top__actions { margin-left: auto; display: flex; align-items: center; gap: 10px; }
.top__login { font-size: .9rem; color: var(--fg-2); padding: 0 8px; text-decoration: none; }
.top__login:hover { color: var(--fg); }
.top__toggle { display: none; width: 40px; height: 40px; align-items: center; justify-content: center; border: 1px solid var(--line-2); border-radius: 10px; background: none; color: var(--fg); cursor: pointer; }
.top__toggle-close { display: none; }
.top__toggle[aria-expanded="true"] .top__toggle-open { display: none; }
.top__toggle[aria-expanded="true"] .top__toggle-close { display: block; }

/* ---------- 首屏 ---------- */
.hero { position: relative; overflow: hidden; padding: 72px var(--pad) 0; text-align: center; }
.hero::before { content: ""; position: absolute; left: 50%; top: -260px; width: 1200px; height: 700px; transform: translateX(-50%); background: radial-gradient(closest-side, var(--glow), transparent); pointer-events: none; }
.hero::after { content: ""; position: absolute; inset: 0; 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; -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 0%, #000 30%, transparent 75%); mask-image: radial-gradient(ellipse 70% 60% at 50% 0%, #000 30%, transparent 75%); pointer-events: none; }
.hero > * { position: relative; z-index: 1; }
.pill { display: inline-flex; align-items: center; gap: 8px; padding: 6px 14px; border-radius: 999px; border: 1px solid var(--line-2); background: color-mix(in srgb, var(--fg) 4%, transparent); font-size: .8125rem; color: var(--tag); text-decoration: none; }
.pill i { width: 6px; height: 6px; border-radius: 50%; background: var(--grad); box-shadow: 0 0 10px var(--a1); }
.hero__title { margin-top: 24px; font-size: clamp(1.875rem, 1.1rem + 4.2vw, 4.25rem); line-height: 1.1; font-weight: 800; letter-spacing: -.025em; }
.hero__lead { margin: 22px auto 0; max-width: 38em; font-size: 1.125rem; line-height: 1.75; color: var(--muted); }
.hero__actions { margin-top: 32px; display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; }
.hero__note { margin-top: 14px; font-size: .8125rem; color: var(--muted-2); }
.hero-shot { position: relative; max-width: 1080px; margin: 44px auto 0; border-radius: 18px 18px 0 0; border: 1px solid var(--line-2); border-bottom: 0; overflow: hidden; max-height: 330px; background: var(--s1); box-shadow: 0 -20px 120px -30px var(--glow); }
.hero-shot img { width: 100%; }
.hero-shot::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 140px; background: linear-gradient(transparent, var(--bg)); }
.stats { max-width: var(--wrap); margin: 0 auto; padding: 24px var(--pad) 8px; display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 12px; }
.stat { text-align: center; }
.stat b { display: block; font-size: 1.875rem; font-weight: 800; letter-spacing: -.02em; }
.stat span { font-size: .8125rem; color: var(--muted); }

/* ---------- 分节 ---------- */
.page { max-width: var(--wrap); margin: 0 auto; }
.sec { padding: 72px var(--pad); }
.sec + .sec { border-top: 1px solid var(--line); }
.sec__head { max-width: 720px; margin: 0 0 40px; }
.sec__head--center { margin: 0 auto 36px; text-align: center; }
.kicker { display: inline-flex; align-items: center; gap: 8px; font-size: .8125rem; font-weight: 700; letter-spacing: .06em; color: var(--tag); }
.kicker::before { content: ""; width: 18px; height: 2px; border-radius: 2px; background: var(--grad); }
.sec__title { margin-top: 14px; font-size: clamp(1.75rem, 1.15rem + 2.1vw, 2.75rem); line-height: 1.18; font-weight: 800; letter-spacing: -.02em; }
.sec__lead { margin-top: 16px; font-size: 1.0625rem; line-height: 1.75; color: var(--muted); }
.sec__lead a { color: var(--fg); }

/* ---------- 痛点 ---------- */
.pains { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.pain { position: relative; display: flex; flex-direction: column; padding: 24px; border-radius: var(--r-lg); background: var(--s1); border: 1px solid var(--line); transition: border-color .2s ease, transform .2s ease; }
.pain:hover { border-color: rgba(255, 122, 69, .35); transform: translateY(-2px); }
.pain__n { font-size: .8125rem; color: var(--muted); }
.pain__q { margin-top: 14px; font-size: 1.25rem; line-height: 1.4; font-weight: 700; }
.pain__d { margin-top: 10px; font-size: .9rem; color: var(--muted); line-height: 1.65; }
.pain__fix { margin-top: auto; padding-top: 18px; }
.pain__fix p { padding-top: 16px; border-top: 1px solid var(--line); font-size: .9rem; line-height: 1.65; color: var(--fg-2); }
.pain__fix b { color: var(--tag); font-weight: 700; }

/* ---------- 方案（图文交替） ---------- */
.sol { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr); gap: 56px; align-items: center; }
.sol + .sol { margin-top: 96px; }
.sol--rev .sol__text { order: 2; }
.sol__no { font-size: .8125rem; font-weight: 700; color: var(--tag); letter-spacing: .06em; }
.sol__title { margin-top: 12px; font-size: clamp(1.5rem, 1.1rem + 1.3vw, 2.125rem); line-height: 1.25; font-weight: 800; letter-spacing: -.015em; }
.sol__lead { margin-top: 14px; color: var(--muted); line-height: 1.75; }
.ticks { margin-top: 22px; display: grid; gap: 12px; }
.ticks li { position: relative; padding-left: 20px; font-size: .95rem; line-height: 1.65; color: var(--fg-2); }
.ticks li::before { content: ""; position: absolute; left: 0; top: .62em; width: 8px; height: 8px; border-radius: 50%; background: var(--grad); box-shadow: 0 0 10px rgba(255, 90, 46, .6); }
.ticks b { color: var(--fg); font-weight: 600; }
.frame { position: relative; border-radius: 16px; overflow: hidden; box-shadow: var(--shot-shadow); }
.frame img { width: 100%; }
.frame--plain { background: var(--s1); }

/* ---------- 一条线 ---------- */
.flow { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 0; border: 1px solid var(--line); border-radius: var(--r-xl); overflow: hidden; background: var(--s1); }
.flow__step { position: relative; padding: 26px 22px; }
.flow__step + .flow__step { border-left: 1px solid var(--line); }
.flow__step i { font-style: normal; font-size: .75rem; font-weight: 700; color: var(--tag); }
.flow__step b { display: block; margin-top: 8px; font-size: 1.0625rem; }
.flow__step p { margin-top: 8px; font-size: .84rem; line-height: 1.6; color: var(--muted); }

/* ---------- 数字砖 ---------- */
.tiles { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.tile { padding: 22px; border-radius: var(--r-lg); background: var(--s1); border: 1px solid var(--line); }
.tile__num { font-size: 2rem; font-weight: 800; letter-spacing: -.02em; }
.tile__name { margin-top: 2px; font-size: .95rem; font-weight: 600; }
.tile__d { margin-top: 8px; font-size: .85rem; line-height: 1.6; color: var(--muted); }

/* ---------- 平台与模型 ---------- */
.duo { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.panel { padding: 28px; border-radius: var(--r-xl); background: var(--s1); border: 1px solid var(--line); }
.panel__h { font-size: 1.125rem; font-weight: 700; }
.panel__d { margin-top: 8px; font-size: .9rem; color: var(--muted); line-height: 1.65; }
.chips { margin-top: 18px; display: flex; flex-wrap: wrap; gap: 8px; }
.chip { display: inline-flex; align-items: center; gap: 6px; height: 34px; padding: 0 14px; border-radius: 999px; background: color-mix(in srgb, var(--fg) 5%, transparent); border: 1px solid var(--line); font-size: .875rem; color: var(--fg-2); }
.chip--hot { border-color: rgba(255, 122, 69, .45); color: var(--fg); background: rgba(255, 90, 46, .1); }
.panel .ticks { margin-top: 18px; }

/* ---------- 定价 ---------- */
#pricing { padding-top: 56px; padding-bottom: 56px; }
#pricing .sec__head { margin-bottom: 22px; }
#pricing .ptabs { margin-bottom: 20px; }
.pricing__grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; align-items: stretch; }
.price { position: relative; display: flex; flex-direction: column; padding: 22px 22px; border-radius: var(--r-xl); background: var(--s1); border: 1px solid var(--line); }
.price--hot { background: var(--s2); border-color: transparent; background-image: linear-gradient(var(--s2), var(--s2)), var(--grad); background-origin: border-box; background-clip: padding-box, border-box; box-shadow: 0 30px 80px -36px var(--glow); }
.price__badge { position: absolute; top: 20px; right: 20px; font-size: .75rem; font-weight: 700; padding: 3px 10px; border-radius: 999px; background: var(--grad); color: var(--on); }
.price__tier { font-size: 1rem; font-weight: 700; }
.price__seats { margin-top: 2px; font-size: .8125rem; color: var(--muted); }
.price__amt { margin-top: 14px; display: flex; align-items: baseline; gap: 4px; }
.price__num { font-size: 2.75rem; line-height: 1; font-weight: 800; letter-spacing: -.03em; }
.price__unit { font-size: .875rem; color: var(--muted); }
.price__was { color: var(--muted-2); }
.price__meta { margin-top: 10px; font-size: .8125rem; color: var(--muted); line-height: 1.6; }
.price__save { display: inline-block; margin-top: 10px; padding: 3px 10px; border-radius: 999px; font-size: .75rem; font-weight: 700; color: var(--tag); background: rgba(255, 90, 46, .12); }
.price__btn { margin-top: 16px; width: 100%; }
.price__group { margin-top: 18px; padding-top: 14px; border-top: 1px solid var(--line); }
.price__gh { font-size: .75rem; font-weight: 700; letter-spacing: .06em; color: var(--muted); }
.price__list { margin-top: 10px; display: grid; gap: 9px; font-size: .875rem; }
.price__list li { display: flex; justify-content: space-between; gap: 10px; color: var(--muted); }
.price__list li b, .price__list li span:last-child { color: var(--fg); font-weight: 600; text-align: right; }
.price__feat { margin-top: 10px; display: grid; gap: 8px; font-size: .84rem; color: var(--fg-2); }
.price__feat li { display: flex; gap: 8px; align-items: flex-start; line-height: 1.5; }
.price__feat li::before { content: "✓"; flex: none; font-weight: 800; color: var(--tag); }
.price--more { justify-content: center; text-align: center; background: transparent; border-style: dashed; border-color: var(--line-2); }
.price--more .price__tier { font-size: 1.125rem; }
.price--more p + p { margin-top: 8px; color: var(--muted); font-size: .9rem; }
.pricing__sub { margin-top: 72px; }
.pricing__sub-h { font-size: 1.375rem; font-weight: 800; letter-spacing: -.01em; }
.pricing__sub-d { margin-top: 8px; font-size: .9375rem; color: var(--muted); line-height: 1.7; }
.packs { margin-top: 24px; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.pack { display: flex; flex-direction: column; padding: 22px; border-radius: var(--r-lg); background: var(--s1); border: 1px solid var(--line); }
.pack__ico { width: 40px; height: 40px; border-radius: 12px; display: flex; align-items: center; justify-content: center; background: rgba(255, 90, 46, .12); color: var(--tag); font-weight: 800; font-size: .95rem; }
.pack__name { margin-top: 14px; font-size: 1rem; font-weight: 700; }
.pack__rows { margin-top: 12px; display: grid; gap: 8px; font-size: .875rem; }
.pack__rows li { display: flex; justify-content: space-between; gap: 10px; color: var(--muted); }
.pack__rows li b { color: var(--fg); font-weight: 700; }
.pack__note { margin-top: auto; padding-top: 14px; font-size: .8rem; color: var(--muted-2); line-height: 1.6; }
.trial { margin-top: 24px; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr) auto; gap: 28px; align-items: center; padding: 28px 30px; border-radius: var(--r-xl); border: 1px solid rgba(255, 122, 69, .35); background: radial-gradient(600px 200px at 0% 0%, rgba(255, 90, 46, .16), transparent), var(--s1); }
.trial__h { font-size: 1.5rem; font-weight: 800; }
.trial__d { margin-top: 6px; font-size: .875rem; color: var(--muted); line-height: 1.6; }
.trial .chips { margin-top: 0; }
.cmp { margin-top: 24px; overflow-x: auto; border: 1px solid var(--line); border-radius: var(--r-lg); }
.cmp table { width: 100%; min-width: 720px; border-collapse: collapse; font-size: .9rem; }
.cmp th, .cmp td { padding: 13px 18px; text-align: center; border-top: 1px solid var(--line); }
.cmp thead th { border-top: 0; background: var(--s2); font-weight: 700; }
.cmp tbody th { text-align: left; font-weight: 500; color: var(--fg-2); white-space: nowrap; }
.cmp td { color: var(--fg); }
.cmp .yes { color: var(--tag); font-weight: 800; }
.cmp tr.sub th { padding-top: 18px; font-size: .75rem; font-weight: 700; letter-spacing: .06em; color: var(--muted); background: color-mix(in srgb, var(--fg) 1.5%, transparent); }
.pricing__std { margin-top: 18px; font-size: .875rem; color: var(--muted); }
.pricing__std summary { cursor: pointer; color: var(--fg-2); }
.pricing__std p { margin-top: 10px; line-height: 1.7; }
.pricing__tbl { margin-top: 12px; overflow-x: auto; border: 1px solid var(--line); border-radius: var(--r-md); }
.pricing__tbl table { width: 100%; border-collapse: collapse; }
.pricing__tbl th, .pricing__tbl td { padding: 10px 14px; text-align: left; border-top: 1px solid var(--line); }
.pricing__tbl thead th { border-top: 0; background: var(--s2); color: var(--fg); }

/* ---------- 常见问题 ---------- */
.faq { display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr); gap: 56px; }
.faq__list { border-top: 1px solid var(--line); }
.faq__item { border-bottom: 1px solid var(--line); }
.faq__q { width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 16px 0; border: 0; background: none; color: var(--fg); font-size: 1rem; font-weight: 600; text-align: left; cursor: pointer; }
.faq__q .plus { flex: none; width: 16px; height: 16px; color: var(--muted); transition: transform .2s ease; }
.faq__q[aria-expanded="true"] .plus { transform: rotate(45deg); color: var(--tag); }
.faq__a { padding: 0 0 22px; font-size: .9375rem; line-height: 1.8; color: var(--muted); }
.faq__a a { color: var(--fg); }

/* ---------- 下载 ---------- */
.dl__tip { margin-bottom: 16px; font-size: .875rem; color: var(--muted); }
.dl__list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.dl__row { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px; padding: 22px 24px; border-radius: var(--r-lg); background: var(--s1); border: 1px solid var(--line); }
.dl__plat { font-weight: 700; }
.dl__meta { margin-right: 12px; font-size: .8125rem; color: var(--muted); }
.dl__notes { flex-basis: 100%; font-size: .8125rem; color: var(--muted); }
.dl__sha { flex-basis: 100%; display: flex; flex-wrap: wrap; align-items: center; gap: 8px; font-size: .75rem; color: var(--muted-2); }
.dl__sha code { font-family: var(--mono); color: var(--muted); word-break: break-all; }
.dl__sha-btn { border: 0; background: none; color: var(--fg-2); font-size: .75rem; cursor: pointer; padding: 0; text-decoration: underline; }
.dl__empty { grid-column: 1 / -1; padding: 22px 24px; border-radius: var(--r-lg); border: 1px dashed var(--line-2); color: var(--muted); font-size: .9rem; }

/* ---------- 申请表 ---------- */
.apply { display: grid; grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr); gap: 56px; align-items: start; }
.form { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px 18px; padding: 26px; border-radius: var(--r-xl); background: var(--s1); border: 1px solid var(--line); }
.form__hint { font-size: .8125rem; color: var(--muted); }
.field { margin: 0; padding: 0; border: 0; min-width: 0; }
.field__label { display: block; font-size: .875rem; font-weight: 600; margin-bottom: 8px; }
.field__label small { font-weight: 400; color: var(--muted); margin-left: 6px; }
.field__req { color: var(--tag); }
.form__trap { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.input { display: block; width: 100%; height: 44px; padding: 0 14px; border-radius: 10px; border: 1px solid var(--line-2); background: color-mix(in srgb, var(--fg) 3%, transparent); color: var(--fg); font: inherit; font-size: .9375rem; }
.input--area { height: auto; min-height: 96px; padding: 10px 14px; resize: vertical; }
.input:hover { border-color: color-mix(in srgb, var(--fg) 24%, transparent); }
.input:focus { outline: none; border-color: var(--a2); box-shadow: 0 0 0 3px rgba(255, 122, 69, .22); }
.input[aria-invalid="true"] { border-color: var(--bad); }
.field__err { margin-top: 6px; font-size: .8125rem; color: var(--bad); }
.field__err:empty { display: none; }
.seg { display: flex; flex-wrap: wrap; gap: 8px; }
.seg__opt { position: relative; }
.seg__opt input { position: absolute; opacity: 0; width: 1px; height: 1px; margin: 0; }
.seg__opt span { display: inline-flex; align-items: center; height: 36px; padding: 0 14px; border-radius: 999px; border: 1px solid var(--line-2); font-size: .875rem; color: var(--fg-2); cursor: pointer; }
.seg__opt span:hover { border-color: color-mix(in srgb, var(--fg) 30%, transparent); }
.seg__opt input:checked + span { background: var(--grad); border-color: transparent; color: var(--on); font-weight: 600; }
.seg__opt input:focus-visible + span { outline: 2px solid var(--a2); outline-offset: 2px; }
.form__foot { display: flex; align-items: center; flex-wrap: wrap; gap: 14px; }
.form__msg { font-size: .875rem; color: var(--muted); }
.form__msg.is-error { color: var(--bad); }
.form__msg.is-ok { color: var(--ok); }
.form__done { padding: 40px 28px; border-radius: var(--r-xl); background: var(--s1); border: 1px solid var(--line); text-align: center; }
.form__done-mark { width: 40px; height: 40px; margin: 0 auto; color: var(--tag); }
.form__done-title { margin-top: 14px; font-size: 1.125rem; font-weight: 700; }
.form__done-time { margin-top: 6px; font-size: .8125rem; color: var(--muted); }

.form > .form__hint, .form > fieldset, .form > .field:has(textarea), .form > .form__foot { grid-column: 1 / -1; }
@media (max-width: 640px) { .form { grid-template-columns: 1fr; } }

/* ---------- 收尾和页脚 ---------- */
.cta { position: relative; overflow: hidden; width: calc(100% - 2 * var(--pad)); max-width: calc(var(--wrap) - 2 * var(--pad)); margin: 0 auto 104px; padding: 72px 32px; border-radius: 28px; text-align: center; border: 1px solid var(--line-2); background: radial-gradient(700px 300px at 50% 0%, rgba(255, 90, 46, .28), transparent), var(--s1); }
.cta__title { font-size: clamp(1.75rem, 1.2rem + 2vw, 2.75rem); line-height: 1.2; font-weight: 800; letter-spacing: -.02em; }
.cta__d { margin-top: 14px; color: var(--muted); }
.cta .btn { margin-top: 28px; }
.foot { border-top: 1px solid var(--line); padding: 56px var(--pad) 32px; background: var(--bg-2); }
.foot__cols { max-width: var(--wrap); margin: 0 auto; display: grid; grid-template-columns: 1.4fr repeat(3, minmax(0, 1fr)); gap: 32px; }
.foot__brand p { margin-top: 12px; max-width: 22em; font-size: .875rem; color: var(--muted); line-height: 1.7; }
.foot h3 { font-size: .8125rem; font-weight: 700; color: var(--fg-2); letter-spacing: .04em; }
.foot ul { margin-top: 14px; display: grid; gap: 10px; font-size: .875rem; color: var(--muted); }
.foot a { text-decoration: none; color: var(--muted); }
.foot a:hover { color: var(--fg); }
.foot__bottom { max-width: var(--wrap); margin: 40px auto 0; padding-top: 24px; border-top: 1px solid var(--line); display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; font-size: .8125rem; color: var(--muted-2); }

/* ---------- 功能详解页 ---------- */
.ftoc { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; max-width: 900px; margin: 0 auto; }
.ftoc a { display: inline-flex; align-items: center; height: 34px; padding: 0 14px; border-radius: 999px; background: color-mix(in srgb, var(--fg) 5%, transparent); border: 1px solid var(--line); color: var(--fg-2); font-size: .875rem; text-decoration: none; }
.ftoc a:hover { border-color: rgba(255, 122, 69, .45); color: var(--fg); }
.spec { scroll-margin-top: 80px; }
.spec__h { display: flex; align-items: center; gap: 12px; font-size: clamp(1.375rem, 1.1rem + 1vw, 1.875rem); font-weight: 800; letter-spacing: -.01em; margin-bottom: 26px; }
.spec__h::before { content: ""; width: 4px; height: 1.1em; border-radius: 4px; background: var(--grad); }
.spec__grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.spec__grid ul { display: grid; gap: 14px; align-content: start; padding: 24px; border-radius: var(--r-lg); background: var(--s1); border: 1px solid var(--line); }
.spec__grid li { position: relative; padding-left: 18px; font-size: .9375rem; line-height: 1.7; color: var(--fg-2); }
.spec__grid li::before { content: ""; position: absolute; left: 0; top: .7em; width: 7px; height: 7px; border-radius: 50%; background: var(--grad); }
.spec__grid li b { color: var(--fg); font-weight: 700; }
.spec__note { margin-top: 16px; font-size: .875rem; line-height: 1.6; color: var(--muted); }
.ptable { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--r-lg); }
.ptable table { width: 100%; min-width: 640px; border-collapse: collapse; font-size: .9375rem; }
.ptable th, .ptable td { padding: 13px 18px; text-align: center; border-top: 1px solid var(--line); }
.ptable thead th { border-top: 0; background: var(--s2); font-weight: 700; }
.ptable tbody th { text-align: left; font-weight: 500; color: var(--fg-2); white-space: nowrap; }
.ptable td { color: var(--fg); }

/* ---------- 解决方案：左边点、右边换图（不点每 6 秒自动换） ---------- */
.soltab { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.25fr); gap: 40px; align-items: center; }
.soltab__list { display: grid; gap: 8px; }
.soltab__item { position: relative; display: block; width: 100%; text-align: left; padding: 18px 20px 18px 22px; border-radius: var(--r-lg); border: 1px solid transparent; background: none; color: var(--fg); cursor: pointer; transition: background .25s ease, border-color .25s ease; }
.soltab__item::before { content: ""; position: absolute; left: 0; top: 18px; bottom: 18px; width: 3px; border-radius: 3px; background: var(--line-2); transition: background .25s ease; }
.soltab__item:hover { background: color-mix(in srgb, var(--fg) 3%, transparent); }
.soltab__item.is-on { background: var(--s1); border-color: var(--line); }
.soltab__item.is-on::before { background: var(--grad); box-shadow: 0 0 12px var(--a1); }
.soltab__no { display: block; font-size: .78rem; font-weight: 700; letter-spacing: .06em; color: var(--muted); }
.soltab__item.is-on .soltab__no { color: var(--tag); }
.soltab__t { display: block; margin-top: 6px; font-size: 1.125rem; font-weight: 700; color: var(--fg-2); }
.soltab__item.is-on .soltab__t { color: var(--fg); }
.soltab__d { display: block; max-height: 0; opacity: 0; overflow: hidden; margin-top: 0; font-size: .9rem; line-height: 1.7; color: var(--muted); transition: max-height .4s ease, opacity .3s ease, margin .4s ease; }
.soltab__item.is-on .soltab__d { max-height: 9em; opacity: 1; margin-top: 8px; }
/* 右边是一块留白的底板，截图从左上角探进来、只露一部分，右下出血 */
.soltab__view { position: relative; }
.soltab__frame { position: relative; aspect-ratio: 5 / 4; overflow: hidden; border-radius: 22px; background: radial-gradient(120% 90% at 0% 0%, color-mix(in srgb, var(--a1) 16%, transparent), transparent 62%), radial-gradient(90% 80% at 100% 100%, color-mix(in srgb, var(--a2) 10%, transparent), transparent 60%), var(--s1); }
.soltab__view .soltab__img { position: absolute; left: 9%; top: 10%; width: 135%; height: auto; aspect-ratio: 16 / 10; border-radius: 14px; opacity: 0; transform: translateY(12px) scale(.985); transition: opacity .5s ease, transform .6s cubic-bezier(.2, .7, .2, 1); pointer-events: none; }
.soltab__img.is-on { opacity: 1; transform: none; pointer-events: auto; }
.soltab__img img { width: 100%; height: 100%; object-fit: cover; object-position: top left; }
.soltab__bar { position: absolute; left: 24px; right: 24px; bottom: -14px; height: 2px; border-radius: 2px; background: var(--line); overflow: hidden; }
.soltab__bar i { display: block; height: 100%; width: 100%; background: var(--grad); transform: scaleX(0); transform-origin: left; }
.soltab__bar i.run { transform: scaleX(1); transition: transform 6s linear; }

/* ---------- 定价页签 ---------- */
.billing { display: flex; align-items: center; justify-content: center; gap: 4px; width: max-content; margin: 0 auto 20px; padding: 4px; border-radius: 999px; background: var(--s1); border: 1px solid var(--line); }
.billing button { height: 34px; padding: 0 18px; border: 0; border-radius: 999px; background: none; color: var(--muted); font: inherit; font-weight: 600; font-size: .875rem; cursor: pointer; }
.billing button[aria-pressed="true"] { background: var(--grad); color: var(--on); }
.billing__note { padding: 0 10px 0 6px; font-size: .8rem; color: var(--muted); }
.editions { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.edition { display: flex; flex-direction: column; gap: 10px; padding: 24px; border-radius: var(--r-xl); background: var(--s1); border: 1px solid var(--line); }
.edition--ml { border-color: color-mix(in srgb, var(--a1) 45%, var(--line)); box-shadow: 0 20px 60px -30px var(--a1); }
.edition__head { display: flex; align-items: center; gap: 10px; }
.edition__head .price__badge { position: static; }
.edition__name { font-size: 1.25rem; font-weight: 700; }
.edition__tag { color: var(--muted); font-size: .9rem; line-height: 1.6; min-height: 2.9em; }
.etable { list-style: none; margin: 4px 0 0; padding: 0; display: grid; }
.etable li { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; padding: 12px 0; border-top: 1px solid var(--line); }
.etable__tier { font-weight: 600; color: var(--fg-2); }
.etable__price { display: inline-flex; align-items: baseline; gap: 6px; }
.etable__num { font-size: 1.5rem; font-weight: 700; letter-spacing: -.01em; }
.etable__unit { font-size: .8rem; color: var(--muted); }
.edition__note { font-size: .875rem; color: var(--tag); font-weight: 600; }
.edition .price__btn { margin-top: auto; }
.editions__gift { margin-top: 14px; text-align: center; font-size: .875rem; color: var(--muted); }
.bento--flip { grid-template-columns: minmax(0, 1.25fr) minmax(0, .85fr); }
.bento--flip .bento__img { order: -1; }
@media (max-width: 960px) { .editions { grid-template-columns: 1fr; } .bento--flip { grid-template-columns: 1fr; } .bento--flip .bento__img { order: 0; } }
.price--wide { max-width: 560px; margin: 0 auto; }
.ppanel--center > .pricing__sub-d { text-align: center; }
.ptabs { display: flex; justify-content: center; gap: 4px; margin: 0 auto 28px; padding: 4px; width: max-content; max-width: 100%; border-radius: 999px; background: var(--s1); border: 1px solid var(--line); }
.ptabs button { height: 38px; padding: 0 20px; border: 0; border-radius: 999px; background: none; color: var(--muted); font-weight: 600; font-size: .9rem; cursor: pointer; transition: color .2s ease, background .2s ease; }
.ptabs button:hover { color: var(--fg); }
.ptabs button[aria-selected="true"] { background: var(--grad); color: var(--on); }
.ppanel { animation: pin .35s ease; }
@keyframes pin { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
.price__lite { margin-top: 18px; padding-top: 16px; border-top: 1px solid var(--line); font-size: .8125rem; color: var(--fg-2); }
.price__lite b { color: var(--tag); }
.pstrip { margin-top: 16px; display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 14px; padding: 16px 22px; border-radius: var(--r-lg); border: 1px solid rgba(255, 122, 69, .3); background: radial-gradient(500px 120px at 0% 0%, rgba(255, 90, 46, .14), transparent), var(--s1); }
.pstrip__t { font-weight: 700; }
.pstrip__t span { margin-left: 10px; font-weight: 400; font-size: .875rem; color: var(--muted); }
.pstrip__acts { display: flex; gap: 10px; flex-wrap: wrap; }
.cmp--lite table { min-width: 640px; }
.cmp--lite th, .cmp--lite td { padding: 10px 16px; }
.featchips { margin-top: 16px; display: flex; flex-wrap: wrap; gap: 8px; }

/* ---------- 动效：进场、跟手的光、数字 ---------- */
.js .rv { opacity: 0; transform: translateY(22px); transition: opacity .7s ease, transform .8s cubic-bezier(.2, .7, .2, 1); }
.js .rv.in { opacity: 1; transform: none; }
:is(.pain, .tile, .price, .panel, .pack, .spec__grid ul) { position: relative; isolation: isolate; }
:is(.pain, .tile, .price, .panel, .pack, .spec__grid ul)::after { content: ""; position: absolute; inset: 0; z-index: -1; border-radius: inherit; background: radial-gradient(260px circle at var(--mx, 50%) var(--my, 0%), rgba(255, 110, 60, .14), transparent 70%); opacity: 0; transition: opacity .25s ease; pointer-events: none; }
:is(.pain, .tile, .price, .panel, .pack, .spec__grid ul):hover::after { opacity: 1; }
.hero::before { animation: breathe 7s ease-in-out infinite; }
@keyframes breathe { 0%, 100% { opacity: .85; transform: translateX(-50%) scale(1); } 50% { opacity: 1; transform: translateX(-50%) scale(1.06); } }
.hero-shot { animation: rise 1s .15s cubic-bezier(.2, .7, .2, 1) both; }
@keyframes rise { from { opacity: 0; transform: translateY(40px); } to { opacity: 1; transform: none; } }
@media (max-width: 960px) {
  .soltab { grid-template-columns: 1fr; gap: 24px; }
  .soltab__view { order: -1; }
}
@media (prefers-reduced-motion: reduce) {
  .js .rv { opacity: 1; transform: none; transition: none; }
  .hero::before, .hero-shot, .ppanel { animation: none; }
  .soltab__img, .soltab__d { transition: none; }
}

/* ---------- 顶栏深浅色按钮 ---------- */
html.i18n-wait body { visibility: hidden; }
/* 只给一种语言看的（英文版首页用外语样片）：页面语言由 js/i18n.js 定 */
html[lang="en"] [data-only-lang="zh"], html:not([lang="en"]) [data-only-lang="en"] { display: none !important; }
.lang-btn { display: inline-flex; align-items: center; justify-content: center; width: 36px; height: 36px; padding: 0; border-radius: 10px; border: 1px solid var(--line-2); background: none; color: var(--fg-2); cursor: pointer; }
.lang-btn:hover { color: var(--fg); background: color-mix(in srgb, var(--fg) 6%, transparent); }
.theme-btn { display: inline-flex; align-items: center; justify-content: center; width: 36px; height: 36px; border-radius: 10px; border: 1px solid var(--line-2); background: none; color: var(--fg-2); cursor: pointer; }
.theme-btn:hover { color: var(--fg); background: color-mix(in srgb, var(--fg) 6%, transparent); }
.theme-btn__moon { display: none; }
:root[data-theme="light"] .theme-btn__sun { display: none; }
:root[data-theme="light"] .theme-btn__moon { display: block; }
@media (prefers-color-scheme: light) { :root:not([data-theme="dark"]) .theme-btn__sun { display: none; } :root:not([data-theme="dark"]) .theme-btn__moon { display: block; } }

/* ---------- 截图：不要边框，悬停浮起，点开放大 ---------- */
.shotcard, .heroview__img, .tool__img { position: relative; overflow: hidden; border-radius: 16px; box-shadow: var(--shot-shadow); background: var(--s1); }
[data-zoom] { cursor: zoom-in; }
[data-zoom] img { width: 100%; height: 100%; object-fit: cover; object-position: top left; transition: transform .6s cubic-bezier(.2, .7, .2, 1); }
[data-zoom]:hover img { transform: scale(1.025); }
.lightbox { position: fixed; inset: 0; z-index: 200; display: flex; align-items: center; justify-content: center; padding: 4vh 4vw; background: rgba(0, 0, 0, .82); backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px); cursor: zoom-out; animation: pin .25s ease; }
.lightbox img { max-width: 100%; max-height: 100%; border-radius: 12px; box-shadow: 0 30px 100px rgba(0, 0, 0, .6); }
.lightbox__x { position: absolute; top: 18px; right: 22px; width: 40px; height: 40px; border-radius: 50%; border: 0; background: rgba(255, 255, 255, .12); color: #fff; font-size: 24px; cursor: pointer; }

/* ---------- 首屏：大图 + 下面切换看哪个界面 ---------- */
.heroview { position: relative; max-width: 980px; margin: 40px auto 0; }
.heroview__stage { position: relative; aspect-ratio: 16 / 10; }
.heroview__stage .heroview__img { position: absolute; inset: 0; opacity: 0; transform: translateY(16px) scale(.985); transition: opacity .5s ease, transform .7s cubic-bezier(.2, .7, .2, 1); pointer-events: none; }
.heroview__img.is-on { opacity: 1; transform: none; pointer-events: auto; }
.heroview__tabs { display: flex; justify-content: center; gap: 4px; width: max-content; max-width: 100%; margin: 20px auto 0; padding: 4px; border-radius: 999px; background: var(--s1); border: 1px solid var(--line); }
.heroview__tabs button { height: 36px; padding: 0 18px; border: 0; border-radius: 999px; background: none; color: var(--muted); font-weight: 600; font-size: .875rem; cursor: pointer; }
.heroview__tabs button:hover { color: var(--fg); }
.heroview__tabs button[aria-selected="true"] { background: var(--grad); color: var(--on); }

/* ---------- 包装：两排样片，反向缓慢滚动，悬停暂停 ---------- */
.sec--wide { max-width: none; }
.marquee { display: grid; gap: 16px; margin: 0 calc(-1 * var(--pad)); -webkit-mask-image: linear-gradient(90deg, transparent, #000 6%, #000 94%, transparent); mask-image: linear-gradient(90deg, transparent, #000 6%, #000 94%, transparent); }
.marquee__row { overflow: hidden; }
.marquee__track { display: flex; gap: 16px; width: max-content; animation: slide 60s linear infinite; }
.marquee__row--rev .marquee__track { animation-direction: reverse; animation-duration: 70s; }
.marquee:hover .marquee__track { animation-play-state: paused; }
@keyframes slide { to { transform: translateX(-50%); } }
.reel { position: relative; flex: none; width: 138px; aspect-ratio: 9 / 16; border-radius: 14px; overflow: hidden; background: var(--s2); box-shadow: var(--shot-shadow); transition: transform .3s ease; }
.reel:hover { transform: translateY(-6px) scale(1.03); }
.reel video, .reel img { width: 100%; height: 100%; object-fit: cover; display: block; }
.reel figcaption { position: absolute; left: 8px; right: 8px; bottom: 8px; padding: 5px 9px; border-radius: 8px; font-size: .72rem; color: #fff; background: rgba(0, 0, 0, .55); backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px); opacity: 0; transform: translateY(6px); transition: opacity .25s ease, transform .25s ease; }
.reel:hover figcaption { opacity: 1; transform: none; }

/* ---------- 咔咔 ---------- */
.bento { display: grid; grid-template-columns: minmax(0, .85fr) minmax(0, 1.25fr); gap: 48px; align-items: center; }
.bento__img { aspect-ratio: 16 / 10; }
.asks { margin-top: 24px; display: flex; flex-wrap: wrap; gap: 10px; }
.ask { display: inline-flex; align-items: center; gap: 8px; padding: 10px 14px; border-radius: 14px 14px 14px 4px; background: var(--s1); border: 1px solid var(--line); font-size: .9rem; color: var(--fg-2); transition: transform .2s ease, border-color .2s ease; }
.ask::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--grad); }
.ask:hover { transform: translateY(-2px); border-color: color-mix(in srgb, var(--a1) 40%, transparent); }
.bento__note { margin-top: 18px; font-size: .85rem; color: var(--muted); }

/* ---------- 更多工具 ---------- */
.tools { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px 22px; }
#tools .sec__head, #gallery .sec__head { margin-bottom: 28px; }
#gallery .sec__head { max-width: 960px; }
.tool__img { aspect-ratio: 16 / 9; }
.tool__h { margin-top: 16px; font-size: 1.0625rem; font-weight: 700; }
.tool__d { margin-top: 6px; font-size: .875rem; line-height: 1.65; color: var(--muted); }

@media (max-width: 960px) {
  .bento { grid-template-columns: 1fr; gap: 28px; }
  .tools { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .reel { width: 132px; }
  .heroview__tabs button { padding: 0 12px; }
}
@media (max-width: 640px) { .tools { grid-template-columns: 1fr; } }
@media (prefers-reduced-motion: reduce) { .marquee__track { animation: none; } .heroview__img { transition: none; } }

/* ---------- 窄屏 ---------- */
@media (max-width: 1100px) {
  .pricing__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .pains, .tiles { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .flow { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .flow__step:nth-child(4) { border-left: 0; }
  .flow__step:nth-child(n+4) { border-top: 1px solid var(--line); }
}
@media (max-width: 960px) {
  :root { --pad: 24px; }
  .top__nav { position: absolute; top: 64px; left: 0; right: 0; flex-direction: column; align-items: stretch; gap: 0; padding: 8px var(--pad) 16px; background: color-mix(in srgb, var(--bg) 96%, transparent); border-bottom: 1px solid var(--line); display: none; }
  .top__nav.is-open { display: flex; }
  .top__nav a { height: 44px; }
  .top__toggle { display: inline-flex; }
  .top__login { display: none; }
  .sol, .faq, .apply, .duo { grid-template-columns: 1fr; gap: 32px; }
  .sol--rev .sol__text { order: 0; }
  .packs { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .trial { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(3, minmax(0, 1fr)); row-gap: 24px; }
  .foot__cols { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .spec__grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .sec { padding: 72px var(--pad); }
  .hero { padding-top: 64px; }
  .pains, .tiles, .pricing__grid, .packs, .dl__list { grid-template-columns: 1fr; }
  .flow { grid-template-columns: 1fr; }
  .flow__step + .flow__step { border-left: 0; border-top: 1px solid var(--line); }
  .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .cta { margin-bottom: 72px; padding: 56px 20px; }
  .top .btn--sm { padding: 0 12px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } .btn, .pain, .top__nav a { transition: none; } }