:root {
  --ink: #07161e;
  --ink-2: #12232e;
  --ink-3: #1d3544;
  --paper: #f6f3ec;
  --paper-2: #efeae0;
  --white: #fffcf7;
  --text: #1a2a33;
  --text-2: #4b5c66;
  --text-3: #6d7e88;
  --line: rgba(7, 22, 30, .1);
  --line-2: rgba(7, 22, 30, .16);
  --line-ink: rgba(255, 255, 255, .1);
  --brand: #1c5fbe;
  --brand-2: #7fb0ff;
  --brand-050: #eef5ff;
  --brand-200: #c5daf8;
  --ok: #1f8a5b;
  --warn: #c47b16;
  --gold: #b8892e;
  --r: 14px;
  --r-lg: 22px;
  --shadow: 0 18px 50px rgba(7, 22, 30, .08);
  --wrap: 1180px;
  --header: 72px;
  --font: "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font);
  color: var(--text);
  background: var(--paper);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  padding-bottom: calc(36px + env(safe-area-inset-bottom, 0px));
}
body::after {
  content: "本回答由 AI 生成，内容仅供参考，请仔细甄别。";
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 80;
  height: calc(36px + env(safe-area-inset-bottom, 0px));
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 16px env(safe-area-inset-bottom, 0px);
  background: #fff8eb;
  border-top: 1px solid #ead9b0;
  color: #8a5a12;
  font-size: 13px;
  line-height: 1.4;
  letter-spacing: .02em;
  pointer-events: none;
}
img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }

html[data-lang="zh"] .en,
html[data-lang="en"] .zh { display: none; }

.wrap { width: min(100% - 40px, var(--wrap)); margin-inline: auto; }
.center { text-align: center; }
.mx-auto { margin-inline: auto; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mt-48 { margin-top: 48px; }
.mb-8 { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.span-2 { grid-column: span 2; }

.h1 {
  font-size: clamp(36px, 5.4vw, 64px);
  line-height: 1.12;
  letter-spacing: -.03em;
  font-weight: 720;
  margin: 0;
}
.h2 {
  font-size: clamp(26px, 3.2vw, 40px);
  line-height: 1.22;
  letter-spacing: -.02em;
  font-weight: 700;
  margin: 0;
}
.h3 {
  font-size: clamp(18px, 1.6vw, 22px);
  line-height: 1.35;
  font-weight: 680;
  margin: 0;
}
.h4 { font-size: 16px; font-weight: 680; margin: 0; }
.lead { color: var(--text-2); font-size: clamp(15px, 1.2vw, 17px); max-width: 46em; }
.small { font-size: 13px; color: var(--text-3); }
.tiny { font-size: 12px; color: var(--text-3); }
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--brand);
  font-weight: 700;
}
.grad-text {
  background: linear-gradient(90deg, #9ec4ff, #fff 45%, #7fb0ff);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.head { max-width: 720px; }
.head .h2 { margin-top: 10px; }
.head .lead { margin-top: 14px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 999px;
  border: 1px solid transparent;
  padding: 10px 16px;
  font-weight: 650;
  line-height: 1;
  transition: transform .15s ease, background .15s ease, color .15s ease, border-color .15s ease;
  white-space: nowrap;
}
.btn svg { width: 16px; height: 16px; }
.btn:hover { transform: translateY(-1px); }
.btn--sm { padding: 8px 13px; font-size: 13px; }
.btn--lg { padding: 14px 20px; font-size: 15px; }
.btn--block { width: 100%; }
.btn--primary { background: var(--brand); color: #fff; }
.btn--primary:hover { background: #164ea0; }
.btn--ghost { background: transparent; color: var(--ink); border-color: var(--line-2); }
.btn--ink { background: var(--ink); color: #fff; }
.btn--light { background: #fff; color: var(--ink); }
.btn--outline-light { background: transparent; color: #fff; border-color: rgba(255,255,255,.28); }
.btn-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  height: var(--header);
  background: color-mix(in srgb, var(--paper) 86%, transparent);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap {
  height: 100%;
  display: flex;
  align-items: center;
  gap: 20px;
}
.brand { display: flex; align-items: center; gap: 10px; min-width: max-content; }
.brand__mark { width: 32px; height: 32px; color: var(--ink); }
.brand__text { display: flex; flex-direction: column; line-height: 1.1; }
.brand__cn { font-weight: 760; font-size: 15px; }
.brand__en { font-size: 10px; letter-spacing: .08em; color: var(--text-3); text-transform: uppercase; }
.nav { display: flex; gap: 18px; margin-left: 12px; flex: 1; }
.nav a { font-size: 14px; color: var(--text-2); padding: 6px 0; border-bottom: 2px solid transparent; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--brand-2); }
.header-actions { display: flex; align-items: center; gap: 10px; margin-left: auto; }
.lang-toggle {
  display: inline-flex;
  border: 1px solid var(--line-2);
  border-radius: 999px;
  overflow: hidden;
}
.lang-toggle button {
  border: 0;
  background: transparent;
  padding: 6px 10px;
  font-size: 12px;
  color: var(--text-3);
}
.lang-toggle button[aria-pressed="true"] { background: var(--ink); color: #fff; }
.burger {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line-2);
  border-radius: 12px;
  background: transparent;
  padding: 0;
}
.burger span {
  display: block;
  width: 16px;
  height: 1.5px;
  background: var(--ink);
  margin: 4px auto;
}
.scrim {
  position: fixed;
  inset: 0;
  background: rgba(7,22,30,.4);
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s ease;
  z-index: 50;
}
.drawer {
  position: fixed;
  top: 0;
  right: 0;
  width: min(86vw, 360px);
  height: 100%;
  background: var(--white);
  transform: translateX(100%);
  transition: transform .24s ease;
  z-index: 60;
  padding: 28px 22px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.drawer nav { display: grid; gap: 4px; }
.drawer nav a { padding: 12px 8px; border-radius: 10px; color: var(--text); }
.drawer nav a[aria-current="page"], .drawer nav a:hover { background: var(--brand-050); }
.drawer__foot { margin-top: auto; display: grid; gap: 10px; }
body.drawer-open .scrim { opacity: 1; pointer-events: auto; }
body.drawer-open .drawer { transform: none; }

.hero, .phero {
  position: relative;
  overflow: hidden;
  background: var(--ink);
  color: #e8f0f6;
}
.hero { padding: 72px 0 88px; }
.phero { padding: 56px 0 64px; }
.hero__grid, .phero .hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(127,176,255,.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(127,176,255,.08) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: radial-gradient(circle at 30% 20%, #000 0, transparent 70%);
}
.hero__glow {
  position: absolute;
  width: 420px;
  height: 420px;
  right: 8%;
  top: -80px;
  background: radial-gradient(circle, rgba(127,176,255,.28), transparent 65%);
  pointer-events: none;
}
.hero__split, .split {
  position: relative;
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: clamp(24px, 4vw, 56px);
  align-items: center;
}
.hero__sub { color: rgba(232,240,246,.78); font-size: clamp(15px, 1.3vw, 18px); max-width: 38em; margin-top: 18px; }
.badge {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  border: 1px solid rgba(127,176,255,.28);
  background: rgba(127,176,255,.08);
  color: #d7e7ff;
  border-radius: 999px;
  padding: 6px 12px;
  font-size: 13px;
  line-height: 1.45;
  margin-bottom: 18px;
  max-width: 100%;
}
.badge__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #7fb0ff;
  box-shadow: 0 0 0 4px rgba(127,176,255,.18);
}
.stat-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 36px;
}
.stat__n { font-size: 28px; font-weight: 760; color: #fff; }
.stat__n em { font-style: normal; color: var(--brand-2); }
.stat__l { margin: 4px 0 0; color: rgba(232,240,246,.62); font-size: 13px; }

.ui {
  background: #10212c;
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 18px;
  overflow: hidden;
  box-shadow: 0 30px 80px rgba(0,0,0,.28);
}
.ui__bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 12px 14px;
  background: #0c1a23;
  border-bottom: 1px solid rgba(255,255,255,.06);
}
.ui__bar i { width: 8px; height: 8px; border-radius: 50%; background: #3d5562; }
.ui__bar i:nth-child(1) { background: #ef7a6b; }
.ui__bar i:nth-child(2) { background: #e0b45a; }
.ui__bar i:nth-child(3) { background: #67c28a; }
.ui__title { margin-left: 8px; font-size: 11px; letter-spacing: .12em; color: #8ea3af; }
.ui__body { padding: 8px 6px 12px; }
.ui-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  color: #d5e2ea;
  font-size: 13px;
}
.ui-row__v { display: inline-flex; align-items: center; gap: 8px; color: #fff; }
.ui-note {
  margin: 8px 12px 4px;
  padding: 10px 12px;
  border-radius: 10px;
  background: rgba(127,176,255,.1);
  color: #d7e7ff;
  font-size: 13px;
}
.bar {
  display: inline-block;
  width: 72px;
  height: 6px;
  border-radius: 99px;
  background: rgba(255,255,255,.1);
  overflow: hidden;
  vertical-align: middle;
}
.bar i { display: block; height: 100%; background: #7fb0ff; }
.bar--ok i { background: #67c28a; }
.chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  border-radius: 999px;
  padding: 3px 8px;
  font-size: 12px;
  background: rgba(255,255,255,.08);
}
.chip--ok { background: rgba(31,138,91,.16); color: #8ee0b6; }
.chip--run { background: rgba(127,176,255,.16); color: #b9d4ff; }
.chip--gold { background: rgba(184,137,46,.16); color: #e8c77a; }
.chip--wait { background: rgba(196,123,22,.14); color: #efc48a; }

.section { padding: 84px 0; }
.section--top0 { padding-top: 0; }
.section--tight { padding: 48px 0; }
.section--white { background: var(--white); }
.section--paper { background: var(--paper); }
.section--paper2 { background: var(--paper-2); }
.section--dark { background: var(--ink); color: #e8f0f6; }
.section--dark .lead, .section--dark .tiny, .section--dark p { color: rgba(232,240,246,.72); }
.section--dark .h2, .section--dark .h3, .section--dark h4 { color: #fff; }

.grid { display: grid; gap: 18px; }
.g-2 { grid-template-columns: repeat(2, 1fr); }
.g-3 { grid-template-columns: repeat(3, 1fr); }

.card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 24px;
}
.card p { color: var(--text-2); margin: 10px 0 0; }
.card__eyebrow { font-size: 12px; letter-spacing: .08em; color: var(--brand); font-weight: 700; margin-bottom: 10px; }
.card__foot { margin-top: 18px; }
.card__list { margin: 0; padding: 0; list-style: none; display: grid; gap: 10px; }
.card__list li { padding-left: 18px; position: relative; color: var(--text-2); }
.card__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .55em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--brand-2);
}
.card--dark {
  background: #10212c;
  border-color: var(--line-ink);
  color: #e8f0f6;
}
.card--dark p, .card--dark .tiny { color: rgba(232,240,246,.72); }
.card--accent { background: var(--ink); color: #fff; border-color: transparent; }
.card--accent p { color: rgba(255,255,255,.78); }
.ico {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: var(--brand-050);
  color: var(--brand);
  margin-bottom: 14px;
}
.ico svg { width: 22px; height: 22px; }
.ico--dark { background: rgba(127,176,255,.12); color: var(--brand-2); }

.cmp-card { overflow: auto; border: 1px solid var(--line); border-radius: var(--r-lg); background: var(--white); }
.cmp { width: 100%; border-collapse: collapse; min-width: 640px; }
.cmp th, .cmp td { padding: 16px 18px; text-align: left; border-bottom: 1px solid var(--line); vertical-align: top; font-size: 14px; }
.cmp th { font-size: 13px; color: var(--text-3); font-weight: 650; background: #faf8f3; }
.col-label { width: 18%; color: var(--text-3); }
.col-mut { color: var(--text-3); }
.col-us { background: var(--brand-050); color: var(--ink); }

.steps { display: grid; gap: 0; }
.step {
  display: grid;
  grid-template-columns: 72px 1fr auto;
  gap: 18px;
  align-items: start;
  padding: 22px 0;
  border-top: 1px solid var(--line);
}
.step__n { font-size: 22px; font-weight: 760; color: var(--brand); }
.step__tag {
  font-size: 12px;
  color: var(--text-3);
  border: 1px solid var(--line-2);
  border-radius: 999px;
  padding: 6px 10px;
  white-space: nowrap;
}

.loop-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--line-ink);
  border: 1px solid var(--line-ink);
  border-radius: var(--r-lg);
  overflow: hidden;
}
.loop-cell { background: #10212c; padding: 26px; }
.loop-cell__n { color: var(--brand-2); font-size: 12px; letter-spacing: .12em; margin-bottom: 10px; font-weight: 700; }
.engine { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; }
.engine__item {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 18px 16px;
}
.engine__n { color: var(--brand); font-weight: 760; margin-bottom: 8px; }

.guarantee {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 28px;
  padding: clamp(24px, 4vw, 40px);
  position: relative;
}
.guarantee__seal {
  width: 52px;
  height: 52px;
  color: var(--brand);
  margin-bottom: 16px;
}

.cta-band {
  background: var(--ink);
  color: #fff;
  border-radius: 28px;
  padding: clamp(32px, 5vw, 56px);
}
.cta-band .lead { color: rgba(255,255,255,.72); }

.site-footer { background: #06131a; color: #c9d6de; padding: 48px 0 24px; }
.site-footer .brand__mark, .site-footer .brand__cn { color: #fff; }
.footer-top { display: grid; grid-template-columns: 1.4fr repeat(3, .7fr); gap: 28px; }
.footer-desc { color: #8ea3af; max-width: 36em; }
.fcol h5 { margin: 0 0 12px; color: #fff; font-size: 13px; letter-spacing: .08em; }
.fcol ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 8px; }
.fcol li { overflow-wrap: anywhere; }
.fcol a:hover { color: #fff; }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-top: 32px;
  padding-top: 18px;
  border-top: 1px solid rgba(255,255,255,.08);
  font-size: 13px;
  color: #7d909b;
}
.footer-soc { display: flex; gap: 10px; }
.footer-soc a { width: 34px; height: 34px; display: grid; place-items: center; color: #c9d6de; border: 1px solid rgba(255,255,255,.12); border-radius: 10px; }
.footer-soc svg { width: 18px; height: 18px; }

.phero__in { position: relative; }
.phero .h1 { color: #fff; }
.phero__sub { color: rgba(232,240,246,.76); }
.crumb { display: flex; gap: 8px; color: #8ea3af; font-size: 13px; margin-bottom: 18px; }
.crumb a:hover { color: #fff; }
.quote { font-size: clamp(22px, 2.6vw, 32px); line-height: 1.4; color: #fff; margin: 0; }
.quote em { color: var(--brand-2); font-style: normal; }
.value {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 18px;
  padding: 18px 0;
  border-top: 1px solid var(--line-ink);
}
.value__k { color: #fff; font-weight: 720; font-size: 18px; }
.value__v { color: rgba(232,240,246,.72); }
.contact-item { display: flex; gap: 12px; padding: 14px 0; }
.contact-item h4 { margin: 0 0 4px; }
.contact-item p { margin: 0; color: var(--text-2); }
.contact-item .soon { color: var(--text-3); font-weight: 650; letter-spacing: .04em; }
.wechat-row { display: flex; gap: 14px; align-items: center; margin-top: 8px; }
.wechat-qr {
  width: 120px; height: 120px; flex: 0 0 auto;
  border: 1px solid var(--line); border-radius: 12px;
  background: #fff; padding: 8px; box-sizing: border-box;
}
.wechat-qr img { width: 100%; height: 100%; display: block; image-rendering: pixelated; }
.timeline { display: grid; gap: 0; }
.tl-item { padding: 18px 0 18px 18px; border-left: 2px solid var(--brand-200); }
.tl-item__d { color: var(--brand); font-size: 12px; letter-spacing: .08em; font-weight: 700; margin-bottom: 6px; }
.person {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 22px;
}
.person__av {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: var(--ink);
  color: #fff;
  font-weight: 760;
  margin-bottom: 14px;
}
.person__role { color: var(--text-3); font-size: 13px; margin: 6px 0 8px; }

.form-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: clamp(22px, 3vw, 32px);
  box-shadow: var(--shadow);
}
.form-ok, .form-err {
  display: none;
  gap: 10px;
  padding: 12px 14px;
  border-radius: 12px;
  margin-bottom: 18px;
  font-size: 14px;
}
.form-ok { background: #e9f7ef; color: #1f8a5b; }
.form-ok.is-on, .form-err:not([hidden]) { display: flex; }
.form-err { background: #fdecec; color: #b42318; }
.field { margin-bottom: 16px; }
.field label { display: block; font-size: 13px; font-weight: 650; margin-bottom: 6px; }
.field input, .field select, .field textarea {
  width: 100%;
  border: 1px solid var(--line-2);
  background: #fff;
  border-radius: 12px;
  padding: 11px 12px;
  outline: none;
}
.field textarea { min-height: 120px; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--brand); box-shadow: 0 0 0 3px rgba(28,95,190,.12); }
.field__err { display: none; color: #b42318; font-size: 12px; margin-top: 6px; }
.field.is-invalid .field__err { display: block; }
.field.is-invalid input, .field.is-invalid select { border-color: #b42318; }
.req { color: #b42318; }
.check { display: flex; gap: 10px; align-items: flex-start; font-size: 13px; color: var(--text-2); margin: 8px 0 18px; }
.check input { margin-top: 3px; }
.form-note { font-size: 13px; color: var(--text-3); }

.faq details { border-top: 1px solid var(--line); padding: 16px 0; }
.faq summary { cursor: pointer; font-weight: 680; }
.faq details p { color: var(--text-2); margin: 10px 0 0; }

.tabs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
.tab {
  border: 1px solid var(--line-2);
  background: transparent;
  border-radius: 999px;
  padding: 7px 12px;
  font-size: 13px;
}
.tab.is-active { background: var(--ink); color: #fff; border-color: var(--ink); }
.post {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 18px;
  padding: 22px 0;
  border-top: 1px solid var(--line);
}
.post__thumb {
  width: 72px;
  height: 72px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  background: var(--brand-050);
  color: var(--brand);
}
.post__thumb svg { width: 28px; height: 28px; }
.post__meta { display: flex; gap: 10px; align-items: center; color: var(--text-3); font-size: 13px; margin-bottom: 8px; }
.link-arrow { display: inline-flex; align-items: center; gap: 6px; color: var(--brand); font-weight: 650; }
.link-arrow svg { width: 16px; height: 16px; }

.case {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 24px;
}
.case__tags { display: flex; gap: 8px; margin-bottom: 12px; }
.case__kpi { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 18px; }
.case__kpi b { display: block; font-size: 28px; }
.case__kpi span { color: var(--text-3); font-size: 13px; }

.rv { opacity: 0; transform: translateY(12px); animation: none; }
.js .rv.in, .rv.in { opacity: 1; transform: none; transition: opacity .5s ease, transform .5s ease; transition-delay: var(--d, 0ms); }
html:not(.js) .rv { opacity: 1; transform: none; }

@media (max-width: 980px) {
  .nav { display: none; }
  /* 保留「进入平台」，仅收起「申请试用」到抽屉，避免窄屏点不到入口 */
  .header-actions .btn--primary.btn--sm { display: none; }
  .burger { display: inline-block; }
  .hero__split, .split, .g-2, .g-3, .engine, .footer-top, .loop-grid, .value { grid-template-columns: 1fr; }
  .span-2 { grid-column: auto; }
  .step { grid-template-columns: 48px 1fr; }
  .step__tag { grid-column: 2; }
  .stat-row { grid-template-columns: 1fr; }
  .post { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .wrap { width: min(100% - 28px, var(--wrap)); }
  .hero, .section, .phero { padding-top: 48px; padding-bottom: 48px; }
}