/* 色值、圆角、动效时长全部取自识多 VI 1.1.0 tokens/brand.css，不另起一套 */
:root {
  --ink: #0B0B0B;
  --paper: #FFFFFF;
  --blue: #2563EB;
  --blue-soft: #EFF6FF;
  --orange: #F59E0B;
  --warm-soft: #FFF3E6;
  --surface: #F8FAFC;
  --line: #E5E7EB;
  --body: #334155;
  --muted: #475569;
  --warm-text: #92400E;
  --control-border: #64748B;
  --error: #B91C1C;

  --font: "PingFang SC", "Noto Sans SC", "Noto Sans CJK SC", "Microsoft YaHei", "Inter", Arial, sans-serif;
  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 20px;
  --max: 1200px;
  --gutter: 20px;
  --fast: 180ms;
  --enter: 360ms;
  --ease: cubic-bezier(.2, .7, .2, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  color: var(--body);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }
a { color: inherit; }
h1, h2, h3, h4 { color: var(--ink); margin: 0; line-height: 1.2; font-weight: 700; letter-spacing: -0.01em; }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }

.wrap { width: 100%; max-width: calc(var(--max) + var(--gutter) * 2); margin: 0 auto; padding: 0 var(--gutter); }
@media (min-width: 768px) { :root { --gutter: 32px; } }

.skip-link {
  position: absolute; left: 16px; top: -64px; z-index: 100;
  background: var(--ink); color: var(--paper); padding: 8px 16px; border-radius: var(--r-sm);
}
.skip-link:focus { top: 12px; }

:focus-visible { outline: 3px solid var(--blue); outline-offset: 3px; border-radius: 4px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 44px; padding: 10px 20px;
  border-radius: var(--r-sm); border: 1px solid var(--ink);
  font: inherit; font-size: 15px; font-weight: 500; line-height: 1.2;
  text-decoration: none; cursor: pointer; white-space: nowrap;
  transition: background-color var(--fast) var(--ease), color var(--fast) var(--ease), transform var(--fast) var(--ease), border-color var(--fast) var(--ease);
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--ink); color: var(--paper); }
.btn-primary:hover { background: var(--body); border-color: var(--body); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--ink); }
.btn-light { background: var(--paper); color: var(--ink); border-color: var(--paper); }
.btn-light:hover { background: var(--blue-soft); }
.btn .arrow { transition: transform var(--fast) var(--ease); }
.btn:hover .arrow { transform: translateX(3px); }

.link { color: var(--blue); text-decoration: underline; text-underline-offset: .2em; }

/* ---------- 顶栏 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: var(--paper);
  border-bottom: 1px solid transparent;
  transition: border-color var(--fast) var(--ease);
}
.site-header.is-scrolled { border-bottom-color: var(--line); }
.header-inner { display: flex; align-items: center; gap: 24px; height: 72px; }
.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; color: var(--ink); }
.brand img { width: 40px; height: 40px; border-radius: 10px; }
.brand-name { font-weight: 700; font-size: 18px; letter-spacing: .02em; }
.brand-name small { font-weight: 500; font-size: 13px; color: var(--muted); margin-left: 6px; letter-spacing: .08em; }
.nav { display: none; margin-left: auto; gap: 4px; }
.nav a {
  text-decoration: none; color: var(--body); font-size: 15px;
  padding: 8px 12px; border-radius: var(--r-sm);
  transition: color var(--fast) var(--ease), background-color var(--fast) var(--ease);
}
.nav a:hover { color: var(--ink); background: var(--surface); }
.header-cta { margin-left: auto; }
@media (min-width: 960px) {
  .nav { display: flex; }
  .header-cta { margin-left: 8px; }
}

/* ---------- 通用区块 ---------- */
.section { padding: 64px 0; }
@media (min-width: 768px) { .section { padding: 96px 0; } }
.section-surface { background: var(--surface); }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 14px; font-weight: 500; color: var(--blue); letter-spacing: .04em;
}
.eyebrow::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--orange); }
.section-head { max-width: 720px; margin-bottom: 48px; }
.section-head h2 { font-size: 28px; margin-top: 12px; }
.section-head p { margin-top: 16px; color: var(--muted); font-size: 17px; }
@media (min-width: 768px) { .section-head h2 { font-size: 40px; } }

.demo-tag {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 12px; font-weight: 500; color: var(--warm-text);
  background: var(--warm-soft); border-radius: 999px; padding: 2px 10px;
}

/* ---------- 首屏 ---------- */
.hero { padding: 48px 0 64px; }
@media (min-width: 768px) { .hero { padding: 72px 0 96px; } }
.hero-grid { display: grid; gap: 48px; align-items: center; }
@media (min-width: 1024px) { .hero-grid { grid-template-columns: 1.05fr .95fr; gap: 64px; } }
.hero h1 { font-size: 36px; margin-top: 16px; }
.hero h1 .hl { color: var(--blue); }
@media (min-width: 768px) { .hero h1 { font-size: 56px; } }
.hero-lead { margin-top: 24px; font-size: 18px; color: var(--muted); max-width: 560px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.hero-points { display: flex; flex-wrap: wrap; gap: 8px 24px; margin-top: 32px; font-size: 14px; color: var(--muted); }
.hero-points li { display: inline-flex; align-items: center; gap: 8px; }
.hero-points li::before { content: ""; width: 16px; height: 2px; background: var(--blue); }

/* 首屏演示面板：一件示例商品走完整条链路 */
.demo-panel {
  border: 1px solid var(--line); border-radius: var(--r-lg);
  background: var(--paper); padding: 24px; position: relative;
}
@media (min-width: 768px) { .demo-panel { padding: 32px; } }
.demo-top { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.demo-top h3 { font-size: 15px; font-weight: 500; color: var(--muted); }
.demo-item {
  margin-top: 20px; padding: 20px; border-radius: var(--r-md); background: var(--surface);
  display: grid; grid-template-columns: 56px 1fr; gap: 16px; align-items: center;
}
.demo-thumb {
  width: 56px; height: 56px; border-radius: var(--r-sm); background: var(--blue-soft);
  display: grid; place-items: center; color: var(--blue);
}
.demo-title { position: relative; min-height: 52px; }
.demo-title span {
  position: absolute; inset: 0; display: flex; flex-direction: column; justify-content: center;
  font-size: 15px; color: var(--ink); font-weight: 500; line-height: 1.4;
  transition: opacity var(--enter) var(--ease), transform var(--enter) var(--ease);
}
.demo-title span small { font-size: 12px; font-weight: 400; color: var(--muted); }
.demo-title .after { opacity: 0; transform: translateY(6px); }
.demo-panel.is-clean .demo-title .before { opacity: 0; transform: translateY(-6px); }
.demo-panel.is-clean .demo-title .after { opacity: 1; transform: none; }

.demo-steps { margin-top: 20px; display: grid; gap: 8px; }
.demo-step {
  display: grid; grid-template-columns: 32px 1fr auto; gap: 12px; align-items: center;
  padding: 12px 14px; border-radius: var(--r-md); border: 1px solid var(--line);
  transition: background-color var(--fast) var(--ease), border-color var(--fast) var(--ease);
}
.demo-step .num {
  width: 32px; height: 32px; border-radius: 50%; display: grid; place-items: center;
  font-size: 13px; font-weight: 700; color: var(--muted); background: var(--surface);
  transition: background-color var(--fast) var(--ease), color var(--fast) var(--ease);
}
.demo-step b { display: block; color: var(--ink); font-size: 15px; font-weight: 500; }
.demo-step em { display: block; font-style: normal; font-size: 13px; color: var(--muted); }
.demo-step .state { font-size: 13px; color: var(--muted); }
.demo-step.is-active { border-color: var(--blue); background: var(--blue-soft); }
.demo-step.is-active .num { background: var(--blue); color: var(--paper); }
.demo-step.is-active .state { color: var(--blue); font-weight: 500; }
.demo-step.is-done .num { background: var(--ink); color: var(--paper); }
.demo-step.is-done .state { color: var(--ink); }
.demo-bar { margin-top: 20px; height: 4px; border-radius: 2px; background: var(--line); overflow: hidden; }
.demo-bar i { display: block; height: 100%; width: 0; background: var(--blue); transition: width 2800ms linear; }
.demo-note { margin-top: 12px; font-size: 12px; color: var(--muted); }

/* ---------- 能力 ---------- */
.cap-grid { display: grid; gap: 0 32px; grid-template-columns: 1fr; }
@media (min-width: 640px) { .cap-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .cap-grid { grid-template-columns: repeat(3, 1fr); } }
.cap {
  padding: 28px 0 32px; border-top: 1px solid var(--line);
  display: grid; grid-template-columns: 48px 1fr; gap: 16px; align-content: start;
}
.cap-icon {
  width: 48px; height: 48px; border-radius: var(--r-md); background: var(--blue-soft); color: var(--blue);
  display: grid; place-items: center;
  transition: background-color var(--fast) var(--ease), color var(--fast) var(--ease);
}
.cap:hover .cap-icon { background: var(--blue); color: var(--paper); }
.cap h3 { font-size: 19px; display: flex; flex-wrap: wrap; align-items: center; gap: 8px 12px; }
.cap p { margin-top: 8px; color: var(--muted); font-size: 15px; }
.status { display: inline-flex; align-items: center; gap: 6px; font-size: 12px; font-weight: 500; color: var(--muted); }
.status::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--blue); }
.status-partial::before { background: var(--orange); }
.status-next::before { background: transparent; border: 1.5px dashed var(--control-border); }

/* ---------- 全链路 ---------- */
.flow { position: relative; display: grid; gap: 0; counter-reset: flow; }
.flow::before {
  content: ""; position: absolute; left: 19px; top: 20px; bottom: 20px; width: 2px; background: var(--line);
}
.flow-progress {
  position: absolute; left: 19px; top: 20px; width: 2px; height: 0; background: var(--blue);
  transition: height 1600ms var(--ease);
}
.flow-step { position: relative; display: grid; grid-template-columns: 40px 1fr; gap: 16px; padding: 12px 0; }
.flow-dot {
  position: relative; z-index: 1; width: 40px; height: 40px; border-radius: 50%;
  background: var(--paper); border: 2px solid var(--line);
  display: grid; place-items: center; font-size: 14px; font-weight: 700; color: var(--muted);
  transition: background-color var(--fast) var(--ease), border-color var(--fast) var(--ease), color var(--fast) var(--ease);
}
.flow-step.is-lit .flow-dot { background: var(--blue); border-color: var(--blue); color: var(--paper); }
.flow-step h3 { font-size: 17px; padding-top: 8px; }
.flow-step p { font-size: 14px; color: var(--muted); margin-top: 4px; }
.flow-group {
  font-size: 12px; font-weight: 500; color: var(--blue); letter-spacing: .06em;
  margin-top: 6px;
}

@media (min-width: 1024px) {
  .flow { grid-template-columns: repeat(9, 1fr); gap: 16px; }
  .flow::before { left: 20px; right: 20px; top: 19px; bottom: auto; width: auto; height: 2px; }
  .flow-progress { left: 20px; top: 19px; height: 2px; width: 0; transition: width 1600ms var(--ease); }
  .flow-step { grid-template-columns: 1fr; gap: 12px; padding: 0; }
  .flow-step h3 { padding-top: 4px; }
}
.flow.is-run .flow-progress { height: calc(100% - 40px); }
@media (min-width: 1024px) {
  .flow.is-run .flow-progress { height: 2px; width: calc(100% - 40px); }
}
.flow-legend { display: flex; flex-wrap: wrap; gap: 8px 24px; margin-top: 40px; font-size: 14px; color: var(--muted); }
.flow-legend b { color: var(--ink); font-weight: 500; }

/* ---------- 产品 ---------- */
.prod-grid { display: grid; gap: 24px; }
@media (min-width: 1024px) { .prod-grid { grid-template-columns: 1.4fr 1fr; } }
.prod {
  border: 1px solid var(--line); border-radius: var(--r-lg); padding: 32px;
  display: flex; flex-direction: column; gap: 16px;
  transition: border-color var(--fast) var(--ease), transform var(--fast) var(--ease);
}
.prod:hover { border-color: var(--ink); }
.prod-main { background: var(--ink); color: var(--paper); border-color: var(--ink); grid-row: span 2; }
.prod-main:hover { border-color: var(--ink); }
.prod-main h3, .prod-main .prod-kicker { color: var(--paper); }
.prod.prod-main p, .prod.prod-main li { color: var(--line); }
.prod-kicker { font-size: 13px; font-weight: 500; color: var(--blue); letter-spacing: .04em; }
.prod h3 { font-size: 24px; }
.prod p { color: var(--muted); }
.prod ul { display: grid; gap: 10px; margin-top: 4px; }
.prod li { display: grid; grid-template-columns: 20px 1fr; gap: 10px; font-size: 15px; }
.prod li svg { margin-top: 3px; color: var(--blue); }
.prod-main li svg { color: var(--orange); }
.prod-actions { margin-top: auto; padding-top: 8px; display: flex; flex-wrap: wrap; gap: 12px; }
.prod-tag { font-size: 12px; color: var(--muted); border: 1px solid var(--line); border-radius: 999px; padding: 2px 10px; align-self: flex-start; }

/* ---------- 谁在用 ---------- */
.role-grid { display: grid; gap: 24px; }
@media (min-width: 768px) { .role-grid { grid-template-columns: repeat(2, 1fr); } }
.role { background: var(--paper); border-radius: var(--r-lg); padding: 28px; border: 1px solid var(--line); }
.role-head { display: flex; align-items: center; gap: 12px; }
.role-head span {
  width: 40px; height: 40px; border-radius: 50%; display: grid; place-items: center;
  background: var(--blue-soft); color: var(--blue); font-weight: 700;
}
.role-head h3 { font-size: 18px; }
.role-head small { display: block; font-size: 13px; color: var(--muted); font-weight: 400; }
.role ol { margin: 20px 0 0; padding: 0; list-style: none; display: grid; gap: 12px; }
.role li { position: relative; padding-left: 20px; font-size: 15px; }
.role li::before { content: ""; position: absolute; left: 0; top: .7em; width: 8px; height: 2px; background: var(--blue); }

/* ---------- 扩展（单色蓝大色块） ---------- */
.expand { background: var(--blue); color: var(--paper); }
.expand .eyebrow, .expand h2, .expand .section-head p { color: var(--paper); }
.expand .eyebrow::before { background: var(--paper); }
.matrix { display: grid; gap: 24px; align-items: stretch; }
@media (min-width: 1024px) { .matrix { grid-template-columns: 1fr 1.3fr 1fr; gap: 32px; } }
.matrix-col h3 { color: var(--paper); font-size: 15px; font-weight: 500; letter-spacing: .06em; margin-bottom: 16px; }
.slot {
  border-radius: var(--r-md); padding: 16px 18px; margin-bottom: 12px;
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  font-weight: 500;
}
.slot small { font-weight: 400; font-size: 13px; }
.slot-live { background: var(--paper); color: var(--ink); }
.slot-live small { color: var(--blue); }
.slot-next { border: 1.5px dashed var(--paper); color: var(--paper); }
.core { background: var(--ink); border-radius: var(--r-lg); padding: 28px; }
.core h3 { color: var(--paper); font-size: 15px; font-weight: 500; letter-spacing: .06em; }
.core ul { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-top: 16px; }
.core li {
  border-radius: var(--r-sm); background: var(--body); color: var(--paper);
  font-size: 14px; text-align: center; padding: 12px 4px;
}
.core p { margin-top: 16px; font-size: 14px; color: var(--line); }

/* ---------- 稳定原则 ---------- */
.rules { display: grid; gap: 0 48px; }
@media (min-width: 768px) { .rules { grid-template-columns: repeat(2, 1fr); } }
.rule { display: grid; grid-template-columns: 56px 1fr; gap: 16px; padding: 24px 0; border-top: 1px solid var(--line); }
.rule-num { font-size: 28px; font-weight: 700; color: var(--blue); line-height: 1; padding-top: 2px; }
.rule h3 { font-size: 18px; }
.rule p { margin-top: 6px; color: var(--muted); font-size: 15px; }

/* ---------- 收尾 CTA 与页脚 ---------- */
.cta-band { display: grid; gap: 24px; align-items: center; padding: 48px 0; border-top: 1px solid var(--line); }
@media (min-width: 768px) { .cta-band { grid-template-columns: 1fr auto; } }
.cta-band h2 { font-size: 28px; }
.cta-band p { margin-top: 8px; color: var(--muted); }
.site-footer { background: var(--surface); padding: 32px 0; font-size: 14px; color: var(--muted); }
.footer-inner { display: flex; flex-wrap: wrap; gap: 16px 32px; align-items: center; justify-content: space-between; }
.footer-links { display: flex; flex-wrap: wrap; gap: 8px 24px; }
.footer-links a { text-decoration: none; }
.footer-links a:hover { color: var(--ink); text-decoration: underline; }

/* ---------- 进场动效：只在 JS 可用时隐藏，保证无脚本也能看全 ---------- */
.js [data-reveal] { opacity: 0; transform: translateY(16px); transition: opacity var(--enter) var(--ease), transform var(--enter) var(--ease); }
.js [data-reveal].is-in { opacity: 1; transform: none; }

/* ---------- 登录页 ---------- */
.login-page { min-height: 100vh; display: grid; grid-template-rows: auto 1fr; }
.demo-banner {
  background: var(--warm-soft); color: var(--warm-text); font-size: 13px; text-align: center; padding: 8px 16px;
}
.login-shell { display: grid; }
@media (min-width: 960px) { .login-shell { grid-template-columns: 1fr 1fr; } }
.login-side { background: var(--blue); color: var(--paper); padding: 20px var(--gutter) 24px; display: flex; flex-direction: column; gap: 16px; }
/* 手机端品牌区只留 Logo 和标题，让表单进入首屏 */
.login-side .login-intro, .login-side .side-foot { display: none; }
@media (min-width: 960px) {
  .login-side { gap: 32px; }
  .login-side .login-intro, .login-side .side-foot { display: block; }
}
@media (min-width: 960px) { .login-side { padding: 48px 64px; justify-content: space-between; } }
.login-side .brand { color: var(--paper); }
.login-side .brand-name small { color: var(--blue-soft); }
.login-side h1 { color: var(--paper); font-size: 24px; }
@media (min-width: 960px) { .login-side h1 { font-size: 40px; } }
.login-side p { color: var(--blue-soft); margin-top: 16px; max-width: 440px; }
.login-values { display: none; gap: 16px; }
@media (min-width: 960px) { .login-values { display: grid; } }
.login-values li { display: grid; grid-template-columns: 40px 1fr; gap: 16px; align-items: start; }
.login-values span {
  width: 40px; height: 40px; border-radius: var(--r-md); background: var(--paper); color: var(--blue);
  display: grid; place-items: center;
}
.login-values b { display: block; color: var(--paper); font-weight: 500; }
.login-values em { display: block; font-style: normal; font-size: 14px; color: var(--blue-soft); }
.login-side .side-foot { font-size: 13px; color: var(--blue-soft); }
.login-side .side-foot a { color: var(--paper); }

.login-main { display: grid; place-items: center; padding: 32px var(--gutter) 48px; }
.login-card { width: 100%; max-width: 400px; }
.login-card h2 { font-size: 28px; }
.login-card > p { margin-top: 8px; color: var(--muted); }
.form { margin-top: 32px; display: grid; gap: 20px; }
.field label { display: block; font-size: 14px; font-weight: 500; color: var(--ink); margin-bottom: 8px; }
.input-wrap { position: relative; }
.field input {
  width: 100%; min-height: 48px; padding: 12px 14px; font: inherit; font-size: 16px; color: var(--ink);
  background: var(--paper); border: 1px solid var(--control-border); border-radius: var(--r-sm);
  transition: border-color var(--fast) var(--ease), box-shadow var(--fast) var(--ease);
}
.field input::placeholder { color: var(--muted); opacity: .8; }
.field input:hover { border-color: var(--ink); }
.field input:focus { outline: none; border-color: var(--blue); box-shadow: 0 0 0 3px var(--blue-soft); }
.field input[aria-invalid="true"] { border-color: var(--error); }
.field .input-wrap input { padding-right: 76px; }
.toggle-pw {
  position: absolute; right: 6px; top: 50%; transform: translateY(-50%);
  min-height: 36px; padding: 0 12px; border: 0; background: transparent; border-radius: 6px;
  font: inherit; font-size: 14px; color: var(--blue); cursor: pointer;
}
.toggle-pw:hover { background: var(--blue-soft); }
.field-error { margin-top: 6px; font-size: 13px; color: var(--error); min-height: 0; }
.field-error:empty { display: none; }
.form-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; font-size: 14px; }
.check { display: inline-flex; align-items: center; gap: 8px; cursor: pointer; color: var(--body); }
.check input { width: 18px; height: 18px; accent-color: var(--ink); }
.form .btn { width: 100%; min-height: 48px; font-size: 16px; }
.form-status {
  display: none; align-items: flex-start; gap: 10px;
  padding: 12px 14px; border-radius: var(--r-sm); font-size: 14px;
  background: var(--blue-soft); color: var(--ink);
}
.form-status.is-shown { display: flex; }
.spinner {
  flex: none; width: 16px; height: 16px; margin-top: 2px; border-radius: 50%;
  border: 2px solid var(--line); border-top-color: var(--blue); animation: spin 800ms linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.login-alt { margin-top: 24px; font-size: 14px; color: var(--muted); display: flex; flex-wrap: wrap; gap: 8px 16px; justify-content: space-between; }

/* 用户开启「减少动态效果」时去掉全部非必要动效，演示直接停在完成态 */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .js [data-reveal] { opacity: 1; transform: none; }
}