/* 记忆缓存 · 官网 v3
   原则：每屏一个焦点；画面优先于文字；黑白 + 单一蓝色；只用系统字体（国内访问快） */

:root {
  --bg: #FFFFFF;
  --bg-alt: #F5F5F7;
  --ink: #1D1D1F;
  --ink-2: #6E6E73;
  --ink-3: #86868B;
  --faint: #D2D2D7;
  --line: #E8E8ED;
  --accent: #1F4BFF;
  --accent-soft: #8DA2FF;
  --dark: #000000;
  --dark-ink-2: #A1A1A6;
  --dark-line: #2C2C2E;

  --sans: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Helvetica Neue",
          "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  --wrap: 1180px;
  --gutter: clamp(16px, 4vw, 40px);
  --section: clamp(96px, 13vw, 180px);
  color-scheme: light;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: var(--sans); font-size: 17px; line-height: 1.6;
  -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
h1, h2, h3, p, ol, ul, dl, figure { margin: 0; }
ol, ul { padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button { font: inherit; color: inherit; }
::selection { background: var(--accent); color: #fff; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }
sup { font-size: .55em; color: var(--ink-3); margin-left: 2px; }
h1, h2, h3 { text-wrap: balance; }
p { text-wrap: pretty; }
section[id] { scroll-margin-top: 52px; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 var(--gutter); }
.skip { position: absolute; left: -999px; top: 8px; z-index: 100; background: var(--ink); color: #fff; padding: 8px 14px; border-radius: 8px; }
.skip:focus { left: 8px; }
.muted { color: var(--ink-3); }
.nw { white-space: nowrap; }

/* 通用排版 */
.h2 { font-size: clamp(34px, 5.2vw, 64px); line-height: 1.12; font-weight: 700; letter-spacing: -.03em; }
.h2--center { text-align: center; }
.lead { margin-top: 18px; font-size: clamp(17px, 1.6vw, 21px); color: var(--ink-2); }
.lead--center { text-align: center; }

/* 按钮 */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  height: 48px; padding: 0 28px; border-radius: 999px; border: 0; cursor: pointer;
  background: var(--ink); color: #fff; font-size: 16px; font-weight: 600;
  transition: background .2s, transform .15s;
}
.btn:hover { background: var(--accent); }
.btn:active { transform: scale(.98); }
.btn--sm { height: 34px; padding: 0 16px; font-size: 14px; }
.btn--lg { height: 54px; padding: 0 32px; font-size: 17px; }
.btn--full { width: 100%; }
.btn--light { background: #fff; color: var(--ink); }
.btn--light:hover { background: var(--accent); color: #fff; }
.link-arrow { font-size: 17px; font-weight: 600; color: var(--accent); }
.link-arrow:hover { text-decoration: underline; text-underline-offset: 4px; }

/* 导航 */
.nav {
  position: sticky; top: 0; z-index: 50; height: 52px;
  background: rgba(255,255,255,.72);
  backdrop-filter: saturate(180%) blur(20px); -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid transparent; transition: border-color .3s, background .3s, color .3s;
}
.nav.is-scrolled { border-bottom-color: rgba(0,0,0,.08); }
.nav.is-dark { background: rgba(0,0,0,.72); color: #fff; border-bottom-color: rgba(255,255,255,.08); }
.nav.is-dark .brand img { filter: invert(1); }
.nav.is-dark .btn { background: #fff; color: var(--ink); }
.nav__inner { height: 52px; display: flex; align-items: center; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 9px; font-weight: 650; font-size: 15px; }
.brand img { width: 32px; height: 16px; }
.nav__links { margin-left: auto; display: flex; gap: 26px; font-size: 13.5px; }
.nav__links a { opacity: .75; transition: opacity .2s; }
.nav__links a:hover, .nav__links a.is-active { opacity: 1; }

/* 首屏 */
.hero { min-height: calc(100svh - 52px); display: flex; flex-direction: column; justify-content: center; padding: clamp(40px, 7vh, 88px) 0 clamp(32px, 5vh, 64px); overflow: hidden; }
.hero__inner { text-align: center; }
.hero__kicker { font-size: clamp(15px, 1.5vw, 19px); color: var(--ink-2); font-weight: 500; }
.hero__title { margin-top: 14px; font-size: clamp(42px, 7.2vw, 92px); line-height: 1.06; font-weight: 700; letter-spacing: -.035em; }
.hero__title > span { display: block; }
.hero__l1 { color: var(--ink-3); }
.hero__sub { margin: 24px auto 0; max-width: 640px; font-size: clamp(17px, 1.7vw, 21px); color: var(--ink-2); }
.hero__cta { margin-top: 32px; display: flex; gap: 28px; justify-content: center; align-items: center; flex-wrap: wrap; }

.loop { position: relative; width: min(820px, 92vw); margin: clamp(36px, 6vh, 64px) auto 0; aspect-ratio: 880 / 340; }
.loop__svg { width: 100%; height: 100%; overflow: visible; }
.loop__left, .loop__right { fill: none; stroke-width: 2; stroke-dasharray: 1; stroke-dashoffset: 1; animation: draw 1.4s .3s cubic-bezier(.6,.1,.2,1) forwards; }
.loop__left { stroke: var(--faint); }
.loop__right { stroke: var(--ink); animation-delay: .9s; }
.loop__dot { fill: var(--accent); filter: drop-shadow(0 0 6px rgba(31,75,255,.6)); }
@keyframes draw { to { stroke-dashoffset: 0; } }
.loop__tag {
  position: absolute; transform: translate(-50%, -50%);
  font-size: clamp(11px, 1.3vw, 14px); white-space: nowrap;
  padding: .45em .9em; border-radius: 999px; background: #fff; border: 1px solid var(--line); color: var(--ink-3);
  opacity: 0; animation: pop .5s ease forwards;
}
.loop__tag:not(.is-new) { text-decoration: line-through; text-decoration-color: rgba(0,0,0,.28); }
.loop__tag.is-new { color: var(--ink); border-color: var(--ink); font-weight: 600; }
.loop__tag--l1 { left: 14%; top: 11%; animation-delay: .9s; }
.loop__tag--l2 { left: 7%;  top: 50%; animation-delay: 1.05s; }
.loop__tag--l3 { left: 16%; top: 89%; animation-delay: 1.2s; }
.loop__tag--r1 { left: 86%; top: 11%; animation-delay: 1.6s; }
.loop__tag--r2 { left: 93%; top: 50%; animation-delay: 1.75s; }
.loop__tag--r3 { left: 84%; top: 89%; animation-delay: 1.9s; }
.loop__core {
  position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%);
  font-size: clamp(12px, 1.4vw, 15px); font-weight: 650; padding: .5em 1em; border-radius: 999px;
  background: var(--ink); color: #fff; opacity: 0; animation: pop .5s 1.3s ease forwards;
}
@keyframes pop { from { opacity: 0; transform: translate(-50%, -40%) scale(.96); } to { opacity: 1; transform: translate(-50%, -50%); } }
.rise { opacity: 0; transform: translateY(18px); animation: rise .8s cubic-bezier(.2,.7,.2,1) forwards; }
.hero__kicker.rise { animation-delay: .05s; } .hero__title.rise { animation-delay: .12s; }
.hero__sub.rise { animation-delay: .22s; } .hero__cta.rise { animation-delay: .3s; } .loop.rise { animation-delay: .25s; }
@keyframes rise { to { opacity: 1; transform: none; } }

.legend { display: none; }

/* 宣言：逐字点亮 */
.manifesto { padding: clamp(80px, 13vw, 180px) 0; }
.manifesto__text { text-wrap: balance; max-width: 980px; margin: 0 auto; text-align: center; font-size: clamp(30px, 4.6vw, 58px); line-height: 1.3; font-weight: 700; letter-spacing: -.025em; }
.manifesto__text .ml { display: block; }
.lit .ch { color: var(--faint); transition: color .25s; }
.lit .ch.on { color: var(--ink); }

/* 场景：改造前后对比 */
.scenes { background: var(--bg-alt); }
.scenes__pin { position: relative; }
.scenes__sticky { padding: clamp(72px, 10vw, 120px) 0; }
.scenes__head { display: flex; align-items: end; justify-content: space-between; gap: 20px 24px; flex-wrap: wrap; margin-bottom: 24px; }
.tabs { display: flex; gap: 4px; padding: 4px; background: #fff; border-radius: 999px; border: 1px solid var(--line); overflow-x: auto; scrollbar-width: none; max-width: 100%; }
.tabs::-webkit-scrollbar { display: none; }
.tab { flex: none; border: 0; background: transparent; cursor: pointer; padding: 8px 16px; border-radius: 999px; font-size: 14px; color: var(--ink-2); transition: background .25s, color .25s; }
.tab.is-on { background: var(--ink); color: #fff; }
.tab:not(.is-on):hover { color: var(--ink); }

.cmp {
  --w: 0;
  position: relative; width: 100%; aspect-ratio: 16 / 9.4;
  font-size: clamp(10px, 1.25vw, 16px);
  user-select: none; -webkit-user-select: none; touch-action: pan-y;
}
.stage { position: absolute; inset: 0; opacity: 0; visibility: hidden; transition: opacity .35s, visibility .35s; }
.stage.is-on { opacity: 1; visibility: visible; }
.stage__layer { position: absolute; inset: 0; }
.stage__after { clip-path: inset(0 0 0 calc((100 - var(--w)) * 1%)); }
.cmp__handle {
  position: absolute; top: -12px; bottom: -12px; width: 2px; background: var(--accent);
  left: calc((100 - var(--w)) * 1%); transform: translateX(-1px); pointer-events: none; z-index: 3;
  box-shadow: 0 0 12px rgba(31,75,255,.55);
  opacity: clamp(0, calc(min(var(--w), 100 - var(--w)) / 3), 1);
}
.cmp__knob {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
  display: flex; background: var(--accent); color: #fff; border-radius: 999px; padding: 6px 2px;
  font-size: 12.5px; font-weight: 600; white-space: nowrap; box-shadow: 0 6px 18px rgba(31,75,255,.35);
}
.cmp__knob i { font-style: normal; padding: 0 10px; }
.cmp__knob i + i { border-left: 1px solid rgba(255,255,255,.35); }
.cmp__range { position: absolute; inset: -12px 0; width: 100%; height: calc(100% + 24px); opacity: 0; cursor: ew-resize; z-index: 4; margin: 0; direction: rtl; }

.cap { display: grid; grid-template-columns: 1fr 1fr auto; gap: 24px; align-items: start; margin-top: 28px; }
.cap p { font-size: 16px; line-height: 1.6; }
.cap__before { color: var(--ink-3); }
.cap__after { color: var(--ink); font-weight: 600; }
.cap p.cap__sig { font-size: 13.5px; color: var(--ink-2); padding: 6px 14px; border-radius: 999px; background: #fff; border: 1px solid var(--line); white-space: nowrap; }

/* 深色段 */
.dark { background: var(--dark); color: #fff; padding: var(--section) 0; }
.dark .lead { color: var(--dark-ink-2); }

.rail { margin-top: clamp(56px, 8vw, 96px); display: grid; grid-template-columns: repeat(5, 1fr); position: relative; --fill: 0; }
.rail::before, .rail::after { content: ""; position: absolute; left: 0; top: 7px; height: 2px; background: var(--dark-line); width: 100%; }
.rail::after { background: var(--accent); width: calc(var(--fill) * 100%); box-shadow: 0 0 10px rgba(31,75,255,.6); }
.rail__item { position: relative; padding: 36px 18px 0 0; opacity: .35; transition: opacity .5s; }
.rail__item.is-lit { opacity: 1; }
.rail__dot { position: absolute; left: 0; top: 0; width: 16px; height: 16px; border-radius: 50%; background: #000; border: 2px solid var(--dark-line); z-index: 1; transition: all .4s; }
.rail__item.is-lit .rail__dot { background: var(--accent); border-color: var(--accent); box-shadow: 0 0 0 6px rgba(31,75,255,.22); }
.rail__item h3 { font-size: clamp(20px, 2vw, 26px); font-weight: 700; letter-spacing: -.01em; }
.rail__item p { margin-top: 8px; font-size: 15px; color: var(--dark-ink-2); line-height: 1.55; }
.rail__item em { display: inline-block; margin-top: 14px; font-style: normal; font-size: 14px; color: var(--accent-soft); }
.also { margin-top: clamp(56px, 8vw, 88px); text-align: center; color: var(--dark-ink-2); font-size: 15px; display: flex; flex-wrap: wrap; justify-content: center; gap: 8px 10px; align-items: center; }
.also span { padding: 5px 12px; border-radius: 999px; border: 1px solid var(--dark-line); color: #fff; font-size: 14px; }

.dark--case { padding-top: 0; }
.case__who { text-align: center; font-size: 15px; color: var(--dark-ink-2); }
.case__big { text-align: center; margin-top: 8px; font-size: clamp(110px, 18vw, 220px); line-height: 1; font-weight: 700; letter-spacing: -.05em; color: #fff; }
.case__big small { font-size: .3em; letter-spacing: 0; margin-left: .12em; color: var(--dark-ink-2); font-weight: 600; }
.case__line { text-align: center; margin-top: 16px; font-size: clamp(19px, 2.2vw, 28px); font-weight: 600; }

.tl { margin: clamp(64px, 9vw, 112px) auto 0; max-width: 980px; display: grid; grid-template-columns: repeat(4, 1fr); position: relative; --fill: 0; }
.tl::before, .tl::after { content: ""; position: absolute; left: 0; top: 5px; height: 2px; width: 100%; background: var(--dark-line); }
.tl::after { background: var(--accent); width: calc(var(--fill) * 100%); }
.tl li { position: relative; padding: 28px 16px 0 0; display: grid; gap: 6px; }
.tl li::before { content: ""; position: absolute; left: 0; top: 0; width: 12px; height: 12px; border-radius: 50%; background: var(--accent); z-index: 1; }
.tl b { font-size: 14px; font-weight: 500; color: var(--accent-soft); font-variant-numeric: tabular-nums; }
.tl span { font-size: 16px; font-weight: 600; }

.nums { margin-top: clamp(72px, 10vw, 128px); display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; text-align: center; }
.num__v { font-size: clamp(54px, 7.6vw, 108px); font-weight: 700; letter-spacing: -.045em; line-height: 1; font-variant-numeric: tabular-nums; }
.num__k { margin-top: 12px; font-size: 15px; color: var(--dark-ink-2); }
.minor { margin-top: clamp(48px, 6vw, 72px); text-align: center; font-size: 15px; color: #fff; opacity: .8; }
.foot { margin-top: 14px; text-align: center; font-size: 12px; color: #6E6E73; }

/* 价格 */
.offer .plans { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; align-items: stretch; }
.plan-free { background: var(--ink); color: #fff; border-radius: 26px; padding: clamp(28px, 3.5vw, 44px); display: flex; flex-direction: column; }
.plan-free__tag { font-size: 14px; color: var(--accent-soft); font-weight: 500; }
.plan-free h3 { margin-top: 8px; font-size: clamp(28px, 3vw, 40px); font-weight: 700; letter-spacing: -.02em; }
.plan-free__price { margin-top: 6px; font-size: 18px; font-weight: 600; }
.plan-free__price b { font-size: clamp(64px, 7vw, 96px); letter-spacing: -.04em; line-height: 1; }
.plan-free__desc { margin: 18px 0 28px; font-size: 16px; color: var(--dark-ink-2); line-height: 1.7; max-width: 420px; }
.plan-free .btn { margin-top: auto; align-self: flex-start; }
.plan-right { align-self: center; }
.plan-list { border-top: 1px solid var(--faint); }
.plan-note { margin-top: 18px; font-size: 13.5px; color: var(--ink-3); line-height: 1.7; }
.plan-list li { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 22px 0; border-bottom: 1px solid var(--faint); }
.plan-list h3 { font-size: clamp(19px, 1.9vw, 23px); font-weight: 700; letter-spacing: -.01em; }
.plan-list p { margin-top: 4px; font-size: 14.5px; color: var(--ink-2); }
.plan-list span { flex: none; font-size: 17px; color: var(--ink); font-weight: 650; }

.offer { padding: var(--section) 0; }
.plans { margin-top: clamp(40px, 6vw, 64px); display: grid; grid-template-columns: 1.3fr repeat(4, 1fr); gap: 14px; }
.plan { background: var(--bg-alt); border-radius: 22px; padding: 26px 22px 26px; display: flex; flex-direction: column; gap: 6px; min-height: 210px; }
.plan--free { background: var(--ink); color: #fff; }
.plan__tag { font-size: 13px; color: var(--ink-3); font-weight: 500; }
.plan--free .plan__tag { color: var(--accent-soft); }
.plan h3 { font-size: 22px; font-weight: 700; letter-spacing: -.01em; }
.plan__price { margin-top: 4px; font-size: 15px; font-weight: 600; color: var(--ink); }
.plan__price b { font-size: 44px; letter-spacing: -.03em; line-height: 1.1; }
.plan--free .plan__price { color: #fff; }
.plan__desc { margin-top: auto; padding-top: 18px; font-size: 14.5px; color: var(--ink-2); line-height: 1.6; }
.plan--free .plan__desc { color: var(--dark-ink-2); margin-top: 8px; padding-top: 0; margin-bottom: 20px; }
.plan--free .btn { margin-top: auto; }

.promise { margin-top: clamp(48px, 7vw, 80px); display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); }
.promise li { padding: 26px 24px 0 0; display: grid; gap: 4px; }
.promise li + li { padding-left: 24px; border-left: 1px solid var(--line); }
.promise b { font-size: clamp(19px, 2vw, 24px); font-weight: 700; letter-spacing: -.01em; }
.promise span { font-size: 15px; color: var(--ink-2); }
.works-with { margin-top: 48px; font-size: 14px; color: var(--ink-3); text-align: center; }

/* 测算 */
.h2--roi { font-size: clamp(32px, 4.4vw, 56px); }
.roi { padding: var(--section) 0; background: var(--bg-alt); }
.roi__grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(32px, 6vw, 96px); align-items: center; }
.roi__form { margin-top: 40px; display: grid; gap: 22px; }
.roi__form label { display: grid; grid-template-columns: 1fr auto; gap: 8px 12px; align-items: center; }
.roi__form span { font-size: 15.5px; font-weight: 600; }
.roi__form output { font-size: 15px; color: var(--accent); font-variant-numeric: tabular-nums; font-weight: 600; }
.roi__form input { grid-column: 1 / -1; width: 100%; accent-color: var(--ink); height: 28px; cursor: pointer; }
.roi__out { text-align: center; }
.roi__big { font-size: clamp(96px, 14vw, 172px); font-weight: 700; letter-spacing: -.05em; line-height: 1; font-variant-numeric: tabular-nums; }
.roi__big small { font-size: .2em; letter-spacing: 0; margin-left: 8px; color: var(--ink-2); font-weight: 600; }
.roi__hours { margin-top: 10px; font-size: 18px; color: var(--ink-2); }
.roi__hours b { color: var(--ink); }
.roi__out .btn { margin-top: 30px; }
.roi__note { margin-top: 14px; font-size: 12.5px; color: var(--ink-3); }

/* 问答 */
.faq { padding: var(--section) 0; }
.faq__grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: clamp(32px, 6vw, 96px); align-items: start; }
.faq__list { border-top: 1px solid var(--ink); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { list-style: none; cursor: pointer; padding: 24px 40px 24px 0; position: relative; font-size: 19px; font-weight: 650; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: ""; position: absolute; right: 4px; top: 50%; width: 14px; height: 14px; margin-top: -7px;
  background: linear-gradient(var(--ink), var(--ink)) center/14px 1.6px no-repeat, linear-gradient(var(--ink), var(--ink)) center/1.6px 14px no-repeat;
  transition: transform .25s;
}
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { padding: 0 40px 26px 0; font-size: 16px; color: var(--ink-2); line-height: 1.75; }

/* 关于 */
.about { padding: 0 0 var(--section); }
.about__inner { text-align: center; }
.founder { display: inline-flex; align-items: center; gap: 16px; text-align: left; margin-bottom: 36px; }
.founder[hidden] { display: none; }
.founder__photo { width: 88px; height: 88px; border-radius: 50%; object-fit: cover; background: var(--bg-alt); }
.founder__name { font-size: 19px; font-weight: 700; }
.founder__title { font-size: 14.5px; color: var(--ink-2); }
.about__text { font-size: clamp(22px, 3vw, 36px); line-height: 1.45; font-weight: 600; letter-spacing: -.015em; }
.about__meta { margin-top: 20px; font-size: 14px; color: var(--ink-3); }

/* 联系 */
.contact .founder { margin: 28px 0 0; display: flex; align-items: center; gap: 14px; }
.contact .founder[hidden] { display: none; }
.contact .founder__photo { width: 64px; height: 64px; }
.contact .founder__title { color: var(--dark-ink-2); }
.contact__grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(32px, 6vw, 96px); align-items: start; }
.ways { margin-top: 36px; display: grid; gap: 12px; }
.way {
  display: grid; gap: 2px; text-align: left; cursor: pointer; width: 100%;
  padding: 18px 22px; border-radius: 16px; border: 1px solid var(--dark-line); background: #0E0E10; color: #fff;
  transition: border-color .2s, background .2s;
}
.way[hidden] { display: none; }
.way:hover { border-color: #fff; }
.way b { font-size: 18px; }
.way span { font-size: 14px; color: var(--dark-ink-2); }
.ways--light .way { background: var(--bg-alt); border-color: var(--line); color: var(--ink); }
.ways--light .way span { color: var(--ink-2); }
.ways--light .way:hover { border-color: var(--ink); }

.lead-form { background: #fff; color: var(--ink); border-radius: 24px; padding: clamp(24px, 3vw, 36px); display: grid; gap: 18px; }
.lead-form__t { font-size: 20px; font-weight: 700; }
.needs { border: 0; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.needs legend { font-size: 13.5px; font-weight: 600; color: var(--ink-2); margin-bottom: 10px; }
.needs label { display: inline-flex; }
.needs input { position: absolute; opacity: 0; pointer-events: none; }
.needs span { padding: 8px 16px; border-radius: 999px; border: 1px solid var(--line); font-size: 14.5px; cursor: pointer; transition: all .2s; }
.needs input:checked + span { background: var(--ink); color: #fff; border-color: var(--ink); }
.needs input:focus-visible + span { outline: 2px solid var(--accent); outline-offset: 2px; }
.field { display: grid; gap: 6px; }
.field span { font-size: 13.5px; font-weight: 600; color: var(--ink-2); }
.field input { font: inherit; font-size: 16px; padding: 13px 14px; border-radius: 12px; border: 1px solid var(--line); background: var(--bg-alt); }
.field input:focus { outline: none; border-color: var(--ink); background: #fff; }
.field input.is-invalid { border-color: #E5484D; }
.lead-form__hint { font-size: 12.5px; color: var(--ink-3); text-align: center; }

/* 页脚 */
.footer { padding: 32px 0 40px; border-top: 1px solid var(--line); font-size: 13px; color: var(--ink-3); }
.footer__inner { display: flex; align-items: center; gap: 24px; flex-wrap: wrap; }
.footer .brand { color: var(--ink); }
.footer__inner > a:last-child { margin-left: auto; }
.footer a:hover { color: var(--ink); }

/* 吸底、面板、提示 */
.dock { display: none; }
.sheet { position: fixed; inset: 0; z-index: 90; }
.sheet[hidden] { display: none; }
.sheet__bg { position: absolute; inset: 0; background: rgba(0,0,0,.4); animation: fade .25s ease; }
.sheet__panel {
  position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%);
  width: min(420px, calc(100vw - 32px)); background: #fff; color: var(--ink); border-radius: 24px; padding: 28px 24px 24px;
  animation: up .3s cubic-bezier(.2,.7,.2,1);
}
.sheet__t { font-size: 22px; font-weight: 700; }
.sheet__x { position: absolute; right: 14px; top: 12px; width: 36px; height: 36px; border-radius: 50%; border: 0; background: var(--bg-alt); font-size: 22px; line-height: 1; cursor: pointer; }
.sheet__qr { margin-top: 18px; display: grid; justify-items: center; gap: 8px; font-size: 13px; color: var(--ink-2); }
.sheet__qr[hidden] { display: none; }
.sheet__qr img { width: 180px; height: 180px; border-radius: 12px; border: 1px solid var(--line); }
.sheet .ways { margin-top: 18px; }
@keyframes fade { from { opacity: 0; } }
@keyframes up { from { opacity: 0; transform: translate(-50%, -46%); } }
.toast {
  position: fixed; left: 50%; bottom: 28px; z-index: 95; transform: translate(-50%, 20px);
  background: var(--ink); color: #fff; padding: 10px 18px; border-radius: 999px; font-size: 14px;
  opacity: 0; pointer-events: none; transition: opacity .3s, transform .3s;
}
.toast.is-on { opacity: 1; transform: translate(-50%, 0); }

/* 进场 */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity .8s ease, transform .8s cubic-bezier(.2,.7,.2,1); }
.reveal.is-in { opacity: 1; transform: none; }

/* 宽屏：场景区吸顶，随滚动揭开 */
@media (min-width: 861px) {
  .scenes__pin { height: calc(5 * 85vh + 100vh); }
  .scenes__sticky { position: sticky; top: 52px; height: calc(100svh - 52px); display: flex; flex-direction: column; justify-content: center; padding: 20px 0; }
  .scenes__sticky .scenes__head, .scenes__sticky .cmp, .scenes__sticky .cap { width: min(100%, calc((100svh - 270px) * 1.75)); margin-left: auto; margin-right: auto; }
  .scenes__sticky .scenes__head { padding: 0; margin-bottom: 18px; }
  .scenes__sticky .h2 { font-size: clamp(32px, 3.6vw, 48px); }
}

@media (max-width: 1080px) {
  .plans { grid-template-columns: repeat(2, 1fr); }
  .plan--free { grid-column: 1 / -1; min-height: 0; }
  .rail { grid-template-columns: repeat(3, 1fr); row-gap: 40px; }
  .rail::before, .rail::after { display: none; }
}

@media (max-width: 860px) {
  .nav__links { display: none; }
  .nav .btn { margin-left: auto; }
  .hero { min-height: auto; padding-top: 56px; }
  .hero__title { font-size: clamp(32px, 9vw, 56px); }
  .loop { width: min(320px, 86vw); margin-top: 32px; }
  .loop__tag { display: none; }
  .legend { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 18px; text-align: center; font-size: 13.5px; }
  .legend li { padding: 3px 0; color: var(--ink); font-weight: 600; }
  .legend s { color: var(--ink-3); font-weight: 400; }
  .legend .legend__h { font-size: 12px; color: var(--ink-3); font-weight: 500; }
  .loop__tag { font-size: 10px; padding: .4em .7em; }
  .loop__tag--l2 { left: 12%; } .loop__tag--r2 { left: 88%; }
  .loop__tag--l1 { left: 18%; } .loop__tag--r1 { left: 82%; }
  .scenes__head { flex-direction: column; align-items: stretch; }
  .cmp { aspect-ratio: 4 / 3.7; font-size: clamp(10.5px, 3.1vw, 12.5px); }
  .cap { grid-template-columns: 1fr; gap: 6px; }
  .cap p { font-size: 15px; }
  .cap p.cap__sig { justify-self: start; margin-top: 8px; white-space: normal; }
  .rail { grid-template-columns: 1fr; row-gap: 0; }
  .rail__item { padding: 0 0 28px 36px; opacity: 1; }
  .rail__dot { top: 6px; background: var(--accent); border-color: var(--accent); }
  .rail__item + .rail__item::before { content: ""; position: absolute; left: 7px; top: -26px; height: 32px; width: 2px; background: var(--dark-line); }
  .rail__item p { margin-top: 4px; }
  .rail__item em { margin-top: 6px; }
  .tl { grid-template-columns: 1fr 1fr; row-gap: 32px; }
  .tl::before, .tl::after { display: none; }
  .nums { grid-template-columns: 1fr; gap: 40px; }
  .plan { min-height: 0; }
  .promise { grid-template-columns: 1fr; }
  .promise li { padding: 20px 0; }
  .promise li + li { padding-left: 0; border-left: 0; border-top: 1px solid var(--line); }
  .roi__grid, .faq__grid, .contact__grid, .offer .plans { grid-template-columns: 1fr; }
  .dark { padding-bottom: calc(var(--section) + 40px); }
  .dock {
    display: flex; gap: 10px; position: fixed; left: 12px; right: 12px; bottom: calc(12px + env(safe-area-inset-bottom)); z-index: 70;
    transform: translateY(160%); transition: transform .35s ease;
  }
  .dock.is-on { transform: none; }
  .dock.is-dark .dock__main { background: #fff; color: var(--ink); box-shadow: 0 0 0 1px rgba(255,255,255,.16), 0 12px 30px -10px rgba(0,0,0,.6); }
  .dock a, .dock button { flex: 1; height: 52px; border-radius: 14px; display: grid; place-items: center; font-weight: 650; font-size: 16px; border: 0; cursor: pointer; }
  .dock__main { background: var(--ink); color: #fff; box-shadow: 0 12px 30px -10px rgba(0,0,0,.45); }
  .dock__alt { background: #fff; color: var(--ink); outline: 1px solid var(--line); box-shadow: 0 12px 30px -10px rgba(0,0,0,.25); }
  .footer { padding-bottom: 100px; }
  .footer__inner > a:last-child { margin-left: 0; }
  .sheet__panel { left: 0; right: 0; top: auto; bottom: 0; transform: none; width: auto; border-radius: 24px 24px 0 0; padding-bottom: calc(24px + env(safe-area-inset-bottom)); animation: upm .3s cubic-bezier(.2,.7,.2,1); }
}
@keyframes upm { from { transform: translateY(40px); opacity: 0; } }

@media (max-width: 560px) {
  .plans { grid-template-columns: 1fr 1fr; gap: 10px; }
  .plan { padding: 18px 16px; border-radius: 18px; }
  .plan h3 { font-size: 18px; }
  .plan__desc { font-size: 13.5px; padding-top: 10px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .rise, .reveal, .loop__tag, .loop__core { opacity: 1 !important; transform: none !important; animation: none !important; transition: none !important; }
  .loop__tag { transform: translate(-50%, -50%) !important; }
  .loop__left, .loop__right { animation: none; stroke-dashoffset: 0; }
  .loop__dot { display: none; }
  .lit .ch { color: var(--ink); }
}

/* =========================================================
   界面效果图组件（场景内使用）
   ========================================================= */

.win {
  position: relative; height: 100%;
  display: flex; flex-direction: column;
  background: #fff; border: 1px solid var(--line); border-radius: 1.1em;
  box-shadow: 0 2.4em 5em -2.4em rgba(10,10,10,.28), 0 .2em .6em rgba(10,10,10,.04);
  overflow: hidden;
}
.win__bar {
  flex: none; height: 2.8em; display: flex; align-items: center; gap: .45em;
  padding: 0 1.1em; border-bottom: 1px solid #EEEDE8; background: #FBFBFA;
  font-size: 1em; color: var(--ink-3);
}
.win__bar i { width: .75em; height: .75em; border-radius: 50%; background: #E2E1DC; }
.win__bar span { margin-left: .8em; font-weight: 550; color: var(--ink-2); }

/* 标签与表格 */
.tag {
  display: inline-block; padding: .15em .6em; border-radius: .4em;
  font-size: .9em; font-weight: 600; background: #F0EFEB; color: var(--ink-3); white-space: nowrap;
}
.tag--red { background: #FDECEC; color: #D93636; }
.tag--purple { background: #F1ECFE; color: #7C4DEB; }
.tag--amber { background: #FEF4E2; color: #C27C0E; }
.tag--green { background: #E5F6EC; color: #16904A; }
.tag--blue { background: #E8EDFF; color: var(--accent); }
.tbl { width: 100%; border-collapse: collapse; font-size: 1em; }
.tbl th { text-align: left; font-weight: 550; color: var(--ink-3); font-size: .88em; padding: .6em .7em; border-bottom: 1px solid #EEEDE8; white-space: nowrap; }
.tbl td { padding: .72em .7em; border-bottom: 1px solid #F3F2EE; white-space: nowrap; color: var(--ink); }
.tbl .muted { color: var(--ink-3); }
.row-new td { background: #F3F6FF; }
.stage.is-after .row-new td { animation: flash 1.6s .4s ease-out both; }
@keyframes flash { 0% { background: #DCE4FF } 100% { background: #F3F6FF } }
.row-warn td { background: #FFF8EC; }

/* 聊天（微信 / 钉钉风格） */
.chat { flex: 1; padding: 1.2em 1.3em; background: #F2F2F0; display: flex; flex-direction: column; justify-content: flex-end; gap: .85em; overflow: hidden; }
.msg { display: flex; gap: .7em; align-items: flex-start; }
.msg > div { max-width: 78%; }
.msg em { display: block; font-style: normal; font-size: .85em; color: var(--ink-3); margin-bottom: .25em; }
.msg p { display: inline-block; background: #fff; padding: .55em .85em; border-radius: .6em; line-height: 1.5; font-size: 1.02em; }
.av { flex: none; width: 2.3em; height: 2.3em; border-radius: .5em; display: grid; place-items: center; font-size: .9em; font-weight: 650; color: #fff; background: #7A8C9E; }
.av--2 { background: #A38B6B; }
.av--3 { background: #5B5B5B; }
.av--ai { background: var(--accent); font-size: .8em; }
.msg-time { align-self: center; font-size: .8em; color: var(--ink-3); background: #E6E5E0; padding: .15em .7em; border-radius: .4em; }
.shot { display: grid; grid-template-columns: repeat(4, 2.6em); gap: .3em; margin-top: .4em; }
.shot b { height: 3.6em; background: linear-gradient(#D8D7D2, #CFCEC8); border-radius: .25em; }
.msg--me { justify-content: flex-end; }
.msg--me p { background: #DCE4FF; }
.filecard { display: flex !important; flex-direction: column; gap: .2em; min-width: 12em; }
.filecard small { color: var(--ink-3); font-size: .82em; }
.answer { background: #fff; border-radius: .6em; padding: .9em 1em; }
.answer p { padding: 0; background: none; }
.answer small { display: block; margin-top: .7em; color: var(--ink-3); font-size: .82em; }
.bars { margin-top: .7em; display: grid; gap: .45em; }
.bars div { display: grid; grid-template-columns: 5.2em 1fr 2em; align-items: center; gap: .6em; font-size: .92em; }
.bars i { height: .7em; border-radius: .35em; background: var(--accent); transform-origin: left; transform: scaleX(0); transition: transform .9s cubic-bezier(.2,.7,.2,1) .35s; width: calc(var(--w) * 100%); }
.stage.is-after .bars i { transform: scaleX(1); }
.bars b { text-align: right; font-variant-numeric: tabular-nums; }

/* CRM 应用 */
.app { flex: 1; display: grid; grid-template-columns: 7.5em 1fr; min-height: 0; }
.app__side { background: #FAFAF8; border-right: 1px solid #EEEDE8; padding: 1em .7em; display: flex; flex-direction: column; gap: .3em; }
.app__side b { font-weight: 500; font-size: .95em; color: var(--ink-2); padding: .45em .7em; border-radius: .45em; }
.app__side b.on { background: var(--ink); color: #fff; }
.app__main { padding: 1em 1.1em; min-width: 0; overflow: hidden; }
.app__tools { display: flex; gap: .45em; margin-bottom: .8em; }
.chip { font-size: .88em; padding: .3em .8em; border-radius: 999px; border: 1px solid #E6E5E0; color: var(--ink-2); }
.chip.on { background: var(--ink); color: #fff; border-color: var(--ink); }
.toast {
  position: absolute; right: 1.2em; bottom: 1.2em;
  display: flex; align-items: center; gap: .6em;
  background: var(--ink); color: #fff; font-size: .95em; font-weight: 550;
  padding: .75em 1.1em; border-radius: .7em; box-shadow: 0 1em 2em -1em rgba(0,0,0,.4);
  opacity: 0; transform: translateY(1em); transition: opacity .5s .6s, transform .5s .6s;
}
.stage.is-after .toast { opacity: 1; transform: none; }
.toast__dot { width: .6em; height: .6em; border-radius: 50%; background: #3DDC84; }

/* 录音文件夹 */
.files { flex: 1; font-size: .98em; }
.files__head, .file { display: grid; grid-template-columns: 1fr 5em 3.5em; padding: .55em 1.3em; }
.files__head { color: var(--ink-3); font-size: .88em; border-bottom: 1px solid #EEEDE8; }
.file:nth-child(odd) { background: #F7F7F5; }
.file span:first-child { color: var(--ink-2); font-family: var(--mono); font-size: .92em; }
.file span:not(:first-child) { color: var(--ink-3); font-variant-numeric: tabular-nums; }
.files__foot { padding: .9em 1.3em; color: var(--ink-3); font-size: .9em; border-top: 1px solid #EEEDE8; }

/* 通话洞察 */
.insight { flex: 1; padding: 1.2em 1.3em; display: flex; flex-direction: column; gap: 1em; min-height: 0; }
.insight__wave { display: flex; align-items: center; gap: .3em; height: 3em; padding: 0 .2em; }
.insight__wave span { flex: 1; height: calc(var(--h) * 100%); border-radius: .2em; background: #D9DFFF; }
.insight__wave span:nth-child(-n+8) { background: var(--accent); }
.insight__grid { display: grid; grid-template-columns: 1.15fr 1fr; gap: 1.1em; min-height: 0; }
.transcript { display: flex; flex-direction: column; gap: .7em; font-size: 1em; line-height: 1.6; }
.transcript em { font-style: normal; font-size: .85em; color: var(--ink-3); margin-right: .5em; }
.transcript mark { background: #FEF0D3; color: inherit; padding: 0 .15em; border-radius: .2em; }
.transcript mark.mark-blue { background: #DCE4FF; }
.cards { display: grid; grid-template-columns: 1fr 1fr; gap: .55em; align-content: start; }
.icard { border: 1px solid #EEEDE8; border-radius: .6em; padding: .6em .75em; display: flex; flex-direction: column; gap: .2em; }
.icard span { font-size: .82em; color: var(--ink-3); }
.icard b { font-size: 1.02em; font-weight: 650; }
.icard--wide { grid-column: span 2; }
.icard--accent { background: var(--ink); border-color: var(--ink); }
.icard--accent span { color: #9B9A95; }
.icard--accent b { color: #fff; }
.lvl { color: #16904A; }

/* Excel */
.win--sheet .win__bar { background: #F2F7F3; }
.sheet { flex: 1; font-size: .95em; }
.sheet__row { display: grid; grid-template-columns: 2.2em 1fr .8fr 1.1fr .8fr 1fr; }
.sheet__row span { padding: .5em .6em; border-right: 1px solid #ECEBE6; border-bottom: 1px solid #ECEBE6; white-space: nowrap; overflow: hidden; color: var(--ink-2); font-variant-numeric: tabular-nums; }
.sheet__row span:first-child { background: #F5F5F3; color: var(--ink-3); text-align: center; }
.sheet__row--h span { background: #F5F5F3; color: var(--ink-3); font-size: .9em; }
.sheet .hl { background: #FFF2A8; }
.sticky-note {
  position: absolute; right: 1.6em; bottom: 1.6em; transform: rotate(3deg);
  background: #FFE873; color: #4A3F00; padding: .9em 1.1em; font-size: 1.05em; font-weight: 600; line-height: 1.5;
  box-shadow: 0 .6em 1.2em -.4em rgba(0,0,0,.25);
}

/* 自动对账 */
.recon { flex: 1; padding: 1.2em 1.3em; display: flex; flex-direction: column; gap: 1em; }
.recon__sum { display: grid; grid-template-columns: repeat(3, 1fr); gap: .6em; }
.recon__sum div { border: 1px solid #EEEDE8; border-radius: .6em; padding: .6em .8em; display: flex; flex-direction: column; gap: .15em; }
.recon__sum span { font-size: .82em; color: var(--ink-3); }
.recon__sum b { font-size: 1.5em; font-weight: 700; letter-spacing: -.02em; }
.ok-t { color: #16904A; }
.warn-t { color: #C27C0E; }
.recon__bar { height: .45em; background: #F0EFEB; border-radius: .3em; overflow: hidden; }
.recon__bar i { display: block; height: 100%; background: #16904A; transform-origin: left; transform: scaleX(0); transition: transform 1.1s cubic-bezier(.2,.7,.2,1) .3s; }
.stage.is-after .recon__bar i { transform: scaleX(1); }

/* 空白文档 */
.doc { flex: 1; padding: 2.2em 2.4em; }
.doc__q { font-size: 2em; font-weight: 650; color: #BDBCB6; letter-spacing: -.01em; }
.caret { display: inline-block; width: 2px; height: 1em; background: var(--ink); vertical-align: -.12em; margin-left: .1em; animation: blink 1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0 } }
.todo { margin-top: 1.6em; display: grid; gap: .75em; }
.todo li { position: relative; padding-left: 1.9em; color: var(--ink-2); font-size: 1.05em; line-height: 1.45; }
.todo li::before { content: ""; position: absolute; left: 0; top: .2em; width: 1.05em; height: 1.05em; border: 1.5px solid #CFCEC8; border-radius: .25em; }
.todo small { color: var(--ink-3); font-size: .85em; }

/* AI 画布 */
.canvas {
  flex: 1; position: relative;
  background-color: #FAFAF8;
  background-image: radial-gradient(#DDDCD6 1px, transparent 1px);
  background-size: 1.4em 1.4em;
}
.canvas__lines { position: absolute; inset: 0; width: 100%; height: 100%; }
.canvas__lines path { fill: none; stroke: var(--accent); stroke-width: .9; stroke-dasharray: 1; stroke-dashoffset: 1; transition: stroke-dashoffset 1s ease .3s; }
.stage.is-after .canvas__lines path { stroke-dashoffset: 0; }
.node {
  position: absolute; width: 22%;
  background: #fff; border: 1px solid #E6E5E0; border-radius: .7em;
  padding: .7em .8em; box-shadow: 0 .5em 1.2em -.6em rgba(0,0,0,.18);
  display: flex; flex-direction: column; gap: .25em;
}
.node span { font-size: .8em; color: var(--ink-3); }
.node b { font-size: .98em; font-weight: 650; }
.node--video .vid { display: grid; place-items: center; height: 4.4em; border-radius: .45em; color: #fff; background: linear-gradient(135deg, #1F4BFF, #0A0A0A); font-size: .9em; }
.node--out { width: 24%; border-color: var(--ink); }
.node--out ul { display: grid; gap: .2em; margin-top: .2em; }
.node--out li { font-size: .9em; color: #16904A; font-weight: 550; }


.win { box-shadow: 0 2.4em 5em -2.4em rgba(0,0,0,.22), 0 .2em .6em rgba(0,0,0,.04); }
.stage__before .win { filter: saturate(.85); }
@media (max-width: 860px) {
  .insight__grid { grid-template-columns: 1fr; }
  .insight__wave { display: none; }
  .app { grid-template-columns: 1fr; }
  .app__side { display: none; }
  .app .tbl th:nth-child(2), .app .tbl td:nth-child(2), .app .tbl th:nth-child(4), .app .tbl td:nth-child(4) { display: none; }
}