/* ============================================================
   职信通官网 · 主样式
   设计语言：科技安全 · 冷峻精密
   ============================================================ */

/* ---------- CSS 变量 ---------- */
:root {
  --bg-0: #05070D;
  --bg-1: #0A0E18;
  --bg-2: #0F1524;
  --bg-3: #131B2E;
  --line: rgba(77, 223, 255, 0.08);
  --line-strong: rgba(77, 223, 255, 0.18);
  --tx-0: #E8EEF7;
  --tx-1: #B8C2D4;
  --tx-2: #8B95A7;
  --tx-3: #5C6878;
  --cyan: #4DDFFF;
  --blue: #3B82F6;
  --amber: #F5A623;
  --red: #FF5260;
  --grad-cool: linear-gradient(135deg, #4DDFFF 0%, #3B82F6 100%);
  --grad-glow: radial-gradient(circle at center, rgba(77,223,255,0.22) 0%, rgba(77,223,255,0) 70%);
  --ff-serif: 'Noto Serif SC', 'Songti SC', 'STSong', serif;
  --ff-sans: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --ff-mono: 'JetBrains Mono', 'SF Mono', Menlo, monospace;
  --container: 1280px;
  --gutter: 32px;
  --r-sm: 4px;
  --r-md: 8px;
  --r-lg: 14px;
}

/* ---------- 重置 ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
body {
  margin: 0;
  font-family: var(--ff-sans);
  font-weight: 400;
  font-size: 15px;
  line-height: 1.7;
  color: var(--tx-1);
  background: var(--bg-0);
  overflow-x: hidden;
  background-image:
    radial-gradient(ellipse 80% 50% at 20% 0%, rgba(59,130,246,0.08), transparent 60%),
    radial-gradient(ellipse 60% 40% at 90% 30%, rgba(77,223,255,0.05), transparent 60%);
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color 0.2s ease; }
ul, ol { list-style: none; padding: 0; margin: 0; }
button { background: none; border: 0; cursor: pointer; color: inherit; font: inherit; padding: 0; }

/* ---------- 容器 ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* ---------- 顶部导航 ---------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 14px 0;
  background: rgba(5, 7, 13, 0.55);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  border-bottom: 1px solid transparent;
  transition: all 0.3s ease;
}
.nav.is-scrolled {
  padding: 10px 0;
  background: rgba(5, 7, 13, 0.85);
  border-bottom-color: var(--line);
}
.nav__inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.nav__brand { display: flex; align-items: center; gap: 12px; }
.nav__logo { width: 36px; height: 36px; }
.nav__name { display: flex; flex-direction: column; line-height: 1.1; }
.nav__name-cn { font-family: var(--ff-serif); font-weight: 700; font-size: 18px; color: var(--tx-0); letter-spacing: 1px; }
.nav__name-en { font-family: var(--ff-mono); font-size: 9px; letter-spacing: 1.6px; color: var(--tx-3); }
.nav__menu { display: flex; gap: 28px; }
.nav__link {
  position: relative;
  font-size: 13px;
  color: var(--tx-2);
  padding: 6px 0;
  letter-spacing: 0.5px;
}
.nav__link::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 1px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}
.nav__link:hover, .nav__link.is-active { color: var(--tx-0); }
.nav__link:hover::after, .nav__link.is-active::after { transform: scaleX(1); }
.nav__toggle { display: none; flex-direction: column; gap: 5px; padding: 8px; }
.nav__toggle span { display: block; width: 22px; height: 1.5px; background: var(--tx-0); transition: all 0.3s; }
.nav__toggle.is-open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav__toggle.is-open span:nth-child(2) { opacity: 0; }
.nav__toggle.is-open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ---------- Hero 首屏 ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 0 80px;
  overflow: hidden;
}
.hero__bg { position: absolute; inset: 0; pointer-events: none; }
.hero__grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(77,223,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(77,223,255,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 50%, #000 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 50% 50%, #000 30%, transparent 80%);
}
.hero__glow { position: absolute; border-radius: 50%; filter: blur(80px); opacity: 0.55; }
.hero__glow--1 {
  width: 600px; height: 600px;
  top: -150px; left: -150px;
  background: radial-gradient(circle, rgba(77,223,255,0.35), transparent 70%);
  animation: float 14s ease-in-out infinite;
}
.hero__glow--2 {
  width: 500px; height: 500px;
  bottom: -100px; right: -100px;
  background: radial-gradient(circle, rgba(59,130,246,0.4), transparent 70%);
  animation: float 18s ease-in-out infinite reverse;
}
@keyframes float { 0%, 100% { transform: translate(0, 0); } 50% { transform: translate(40px, -30px); } }
.hero__scanline {
  position: absolute; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(77,223,255,0.4), transparent);
  animation: scan 8s linear infinite;
  opacity: 0.6;
}
@keyframes scan { 0% { top: 0; } 100% { top: 100%; } }
.hero__inner { position: relative; z-index: 2; text-align: center; }

.hero__chip {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 14px;
  border: 1px solid var(--line-strong);
  border-radius: 100px;
  background: rgba(15, 21, 36, 0.6);
  font-family: var(--ff-mono);
  font-size: 10.5px;
  letter-spacing: 1.5px;
  color: var(--tx-2);
  margin-bottom: 40px;
}
.hero__chip .dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 10px var(--cyan);
  animation: pulse 1.6s ease-in-out infinite;
}
@keyframes pulse { 0%, 100% { opacity: 1; transform: scale(1); } 50% { opacity: 0.4; transform: scale(0.8); } }

.hero__title { margin: 0 0 32px; font-family: var(--ff-serif); }
.hero__title-line {
  display: block;
  font-size: clamp(64px, 12vw, 168px);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -2px;
  background: linear-gradient(180deg, #FFFFFF 0%, #4DDFFF 50%, #3B82F6 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero__title-line em {
  display: inline-block;
  font-style: normal;
  color: var(--cyan);
  -webkit-text-fill-color: var(--cyan);
  font-size: 0.5em;
  vertical-align: middle;
  margin: 0 0.05em;
  transform: translateY(-0.15em);
  opacity: 0.7;
}
.hero__title-sub {
  display: block;
  margin-top: 24px;
  font-family: var(--ff-sans);
  font-size: clamp(14px, 1.6vw, 18px);
  font-weight: 300;
  letter-spacing: 6px;
  color: var(--tx-2);
}
.hero__lead {
  max-width: 580px;
  margin: 0 auto 56px;
  font-size: 15px;
  line-height: 2;
  color: var(--tx-1);
}
.hero__meta { display: flex; justify-content: center; gap: 60px; flex-wrap: wrap; }
.hero__meta-item {
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  position: relative;
  padding: 0 24px;
}
.hero__meta-item:not(:last-child)::after {
  content: '';
  position: absolute;
  right: -30px; top: 50%;
  transform: translateY(-50%);
  width: 1px; height: 28px;
  background: var(--line);
}
.hero__meta-k { font-family: var(--ff-mono); font-size: 10px; letter-spacing: 2px; color: var(--tx-3); }
.hero__meta-v { font-family: var(--ff-serif); font-size: 14px; color: var(--tx-0); font-weight: 500; }
.hero__scroll {
  position: absolute;
  bottom: 32px; left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  font-family: var(--ff-mono);
  font-size: 10px;
  letter-spacing: 2px;
  color: var(--tx-3);
  animation: bob 2.4s ease-in-out infinite;
}
@keyframes bob { 0%, 100% { transform: translate(-50%, 0); } 50% { transform: translate(-50%, 6px); } }
.hero__corner {
  position: absolute;
  width: 24px; height: 24px;
  border-color: var(--line-strong);
  border-style: solid;
  border-width: 0;
}
.hero__corner--tl { top: 90px; left: 24px; border-top-width: 1px; border-left-width: 1px; }
.hero__corner--tr { top: 90px; right: 24px; border-top-width: 1px; border-right-width: 1px; }
.hero__corner--bl { bottom: 24px; left: 24px; border-bottom-width: 1px; border-left-width: 1px; }
.hero__corner--br { bottom: 24px; right: 24px; border-bottom-width: 1px; border-right-width: 1px; }

/* ---------- 通用区块 ---------- */
.section {
  position: relative;
  padding: 140px 0;
  border-top: 1px solid var(--line);
}
.section::before {
  content: '';
  position: absolute;
  top: 0; left: 50%;
  transform: translateX(-50%);
  width: 1px; height: 60px;
  background: linear-gradient(180deg, var(--cyan), transparent);
  opacity: 0.6;
}
.sec-head { margin-bottom: 80px; max-width: 720px; }
.sec-head__index {
  display: inline-block;
  font-family: var(--ff-mono);
  font-size: 11px;
  letter-spacing: 3px;
  color: var(--cyan);
  margin-bottom: 20px;
  padding-left: 24px;
  position: relative;
}
.sec-head__index::before {
  content: '';
  position: absolute;
  left: 0; top: 50%;
  width: 16px; height: 1px;
  background: var(--cyan);
}
.sec-head__title {
  font-family: var(--ff-serif);
  font-size: clamp(36px, 5vw, 60px);
  font-weight: 700;
  line-height: 1.15;
  color: var(--tx-0);
  margin: 0 0 24px;
  letter-spacing: -0.5px;
}
.sec-head__title em {
  font-style: normal;
  background: var(--grad-cool);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.sec-head__desc { font-size: 15px; line-height: 1.9; color: var(--tx-2); margin: 0; }

/* ---------- 关于我们：双栏 ---------- */
.duo { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.duo__card {
  position: relative;
  padding: 48px 40px;
  background: linear-gradient(155deg, var(--bg-2) 0%, var(--bg-1) 100%);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
  transition: border-color 0.3s ease, transform 0.3s ease;
}
.duo__card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan), transparent);
  opacity: 0.4;
}
.duo__card:hover { border-color: var(--line-strong); transform: translateY(-4px); }
.duo__card--alt::before { background: linear-gradient(90deg, transparent, var(--blue), transparent); }
.duo__num {
  display: inline-block;
  font-family: var(--ff-mono);
  font-size: 11px;
  letter-spacing: 2px;
  color: var(--cyan);
  padding: 4px 10px;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-sm);
  margin-bottom: 28px;
}
.duo__card--alt .duo__num { color: var(--blue); }
.duo__title {
  font-family: var(--ff-serif);
  font-size: 28px;
  font-weight: 700;
  color: var(--tx-0);
  margin: 0 0 20px;
}
.duo__text { font-size: 14px; line-height: 1.95; color: var(--tx-1); margin: 0 0 28px; }
.duo__list { display: flex; flex-direction: column; gap: 10px; }
.duo__list li {
  display: flex; gap: 10px;
  padding: 10px 14px;
  background: rgba(77,223,255,0.03);
  border-left: 2px solid var(--cyan);
  font-size: 13.5px;
  color: var(--tx-1);
}
.duo__card--alt .duo__list li { border-left-color: var(--blue); }
.duo__list li span { color: var(--cyan); }

/* ---------- 数据卡片 ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border: 1px solid var(--line);
  background: var(--bg-1);
}
.stat {
  position: relative;
  padding: 44px 36px;
  border-right: 1px solid var(--line);
  transition: background 0.3s ease;
}
.stat:last-child { border-right: 0; }
.stat:hover { background: rgba(77,223,255,0.03); }
.stat__corner {
  position: absolute;
  top: 12px; right: 12px;
  width: 8px; height: 8px;
  border-top: 1px solid var(--cyan);
  border-right: 1px solid var(--cyan);
}
.stat__label {
  font-family: var(--ff-mono);
  font-size: 11px;
  letter-spacing: 2px;
  color: var(--tx-3);
  margin-bottom: 24px;
  text-transform: uppercase;
}
.stat__num {
  display: inline-block;
  font-family: var(--ff-mono);
  font-size: clamp(36px, 4.5vw, 56px);
  font-weight: 500;
  line-height: 1;
  color: var(--tx-0);
  letter-spacing: -2px;
  text-shadow: 0 0 30px rgba(77,223,255,0.25);
}
.stat__suffix {
  display: inline-block;
  margin-left: 8px;
  font-size: 13px;
  color: var(--tx-2);
  font-family: var(--ff-sans);
}
.stat__bar { margin-top: 28px; height: 2px; background: var(--bg-3); overflow: hidden; }
.stat__bar span {
  display: block;
  height: 100%;
  width: 0;
  background: var(--grad-cool);
  transition: width 1.6s cubic-bezier(0.22, 1, 0.36, 1);
}
.stat.is-visible .stat__bar span { width: 100%; }

/* ---------- 三方角色 ---------- */
.roles { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.role {
  position: relative;
  padding: 40px 32px;
  background: var(--bg-1);
  border: 1px solid var(--line);
  transition: all 0.3s ease;
}
.role:hover { border-color: var(--line-strong); background: var(--bg-2); transform: translateY(-4px); }
.role--center {
  background: linear-gradient(180deg, var(--bg-2) 0%, var(--bg-1) 100%);
  border-color: var(--line-strong);
}
.role--center::before {
  content: '';
  position: absolute;
  inset: -1px;
  border: 1px solid var(--cyan);
  opacity: 0.2;
  pointer-events: none;
}
.role__head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 32px;
  padding-bottom: 16px;
  border-bottom: 1px dashed var(--line);
}
.role__tag { font-family: var(--ff-mono); font-size: 11px; letter-spacing: 2px; color: var(--cyan); }
.role__id { font-family: var(--ff-mono); font-size: 11px; color: var(--tx-3); }
.role__title {
  font-family: var(--ff-serif);
  font-size: 24px;
  font-weight: 600;
  color: var(--tx-0);
  margin: 0 0 12px;
}
.role__desc { font-size: 13.5px; color: var(--tx-2); margin: 0 0 24px; line-height: 1.8; }
.role__list { display: flex; flex-direction: column; gap: 0; margin-bottom: 28px; border-top: 1px solid var(--line); }
.role__list li {
  position: relative;
  padding: 12px 0 12px 22px;
  font-size: 13.5px;
  color: var(--tx-1);
  border-bottom: 1px solid var(--line);
}
.role__list li::before {
  content: '＋';
  position: absolute;
  left: 0; top: 12px;
  color: var(--cyan);
  font-size: 12px;
}
.role__foot {
  font-family: var(--ff-mono);
  font-size: 10.5px;
  color: var(--tx-3);
  letter-spacing: 0.5px;
  line-height: 1.7;
  padding-top: 16px;
  border-top: 1px dashed var(--line);
}

/* ---------- 业务流程 ---------- */
.flow {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px 24px;
  counter-reset: flow;
}
.flow__step {
  position: relative;
  padding: 36px 28px;
  background: var(--bg-1);
  border: 1px solid var(--line);
  transition: all 0.3s ease;
}
.flow__step:hover {
  border-color: var(--cyan);
  background: var(--bg-2);
  box-shadow: 0 8px 24px rgba(77,223,255,0.08);
}
.flow__step::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 3px; height: 100%;
  background: var(--grad-cool);
  opacity: 0;
  transition: opacity 0.3s ease;
}
.flow__step:hover::before { opacity: 1; }
.flow__num {
  display: inline-block;
  font-family: var(--ff-mono);
  font-size: 32px;
  font-weight: 700;
  color: var(--cyan);
  line-height: 1;
  margin-bottom: 20px;
  opacity: 0.4;
}
.flow__title {
  font-family: var(--ff-serif);
  font-size: 20px;
  font-weight: 600;
  color: var(--tx-0);
  margin: 0 0 10px;
}
.flow__desc {
  font-size: 13.5px;
  color: var(--tx-2);
  margin: 0;
  line-height: 1.8;
}

/* ---------- 风控成效 ---------- */
.impact {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 48px;
  margin-bottom: 80px;
}
.impact__main {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 64px 40px;
  background: linear-gradient(155deg, var(--bg-2) 0%, var(--bg-1) 100%);
  border: 1px solid var(--line-strong);
  position: relative;
  overflow: hidden;
}
.impact__main::before {
  content: '';
  position: absolute;
  inset: -50%;
  background: var(--grad-glow);
  animation: rotate 12s linear infinite;
}
@keyframes rotate {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}
.impact__big {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: baseline;
  gap: 6px;
}
.impact__big-num {
  font-family: var(--ff-mono);
  font-size: clamp(80px, 10vw, 140px);
  font-weight: 700;
  line-height: 1;
  color: var(--tx-0);
  text-shadow: 0 0 50px rgba(77,223,255,0.4);
}
.impact__big-unit {
  font-family: var(--ff-mono);
  font-size: clamp(40px, 5vw, 64px);
  color: var(--cyan);
}
.impact__big-label {
  position: relative;
  z-index: 2;
  margin-top: 28px;
  font-size: 13.5px;
  color: var(--tx-1);
  text-align: center;
  line-height: 1.8;
}

.impact__list {
  display: flex;
  flex-direction: column;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.impact__item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 32px;
  background: var(--bg-1);
  transition: background 0.2s ease;
}
.impact__item:hover { background: var(--bg-2); }
.impact__item-k {
  font-size: 13.5px;
  color: var(--tx-2);
}
.impact__item-v {
  font-family: var(--ff-mono);
  font-size: 15px;
  font-weight: 500;
  color: var(--tx-0);
}

/* 区域覆盖 */
.region {
  padding: 48px 44px;
  background: var(--bg-1);
  border: 1px solid var(--line);
}
.region__title {
  font-family: var(--ff-serif);
  font-size: 22px;
  font-weight: 600;
  color: var(--tx-0);
  margin: 0 0 32px;
}
.region__title span {
  font-family: var(--ff-mono);
  font-size: 12px;
  color: var(--tx-3);
  font-weight: 400;
  margin-left: 12px;
}
.region__list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 16px 20px;
}
.region__list li {
  position: relative;
  padding: 12px 16px 12px 32px;
  background: var(--bg-2);
  border: 1px solid var(--line);
  font-size: 14px;
  color: var(--tx-1);
  transition: all 0.2s ease;
}
.region__list li::before {
  content: '●';
  position: absolute;
  left: 14px;
  color: var(--cyan);
  font-size: 8px;
}
.region__list li:hover {
  border-color: var(--cyan);
  background: var(--bg-3);
}
.region__more {
  grid-column: 1 / -1;
  text-align: center;
  padding-left: 16px;
  color: var(--tx-3);
  font-style: italic;
  border-style: dashed;
}
.region__more::before { content: ''; }

/* ---------- 数据安全 ---------- */
.security {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}
.security__item {
  padding: 40px 36px;
  background: var(--bg-1);
  border: 1px solid var(--line);
  transition: all 0.3s ease;
}
.security__item:hover {
  border-color: var(--cyan);
  background: var(--bg-2);
}
.security__icon {
  width: 48px;
  height: 48px;
  margin-bottom: 24px;
  color: var(--cyan);
  opacity: 0.85;
}
.security__item h4 {
  font-family: var(--ff-serif);
  font-size: 20px;
  font-weight: 600;
  color: var(--tx-0);
  margin: 0 0 12px;
}
.security__item p {
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--tx-2);
  margin: 0;
}
.security__note {
  padding: 24px 32px;
  background: rgba(245,166,35,0.05);
  border: 1px solid rgba(245,166,35,0.15);
  border-radius: var(--r-sm);
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--tx-1);
}
.security__note-tag {
  display: inline-block;
  padding: 2px 8px;
  background: var(--amber);
  color: var(--bg-0);
  font-family: var(--ff-mono);
  font-size: 10px;
  letter-spacing: 1.5px;
  border-radius: var(--r-sm);
  margin-right: 12px;
  font-weight: 600;
}

/* ---------- 发展规划 ---------- */
.timeline {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.timeline__col {
  position: relative;
  padding: 44px 36px;
  background: var(--bg-1);
  border: 1px solid var(--line);
  transition: all 0.3s ease;
}
.timeline__col:hover {
  border-color: var(--line-strong);
  background: var(--bg-2);
}
.timeline__col--mid {
  background: linear-gradient(180deg, var(--bg-2) 0%, var(--bg-1) 100%);
  border-color: var(--line-strong);
}
.timeline__col--mid::before {
  content: '';
  position: absolute;
  inset: -1px;
  background: linear-gradient(180deg, var(--cyan) 0%, transparent 100%);
  opacity: 0.15;
  pointer-events: none;
}
.timeline__phase {
  display: inline-block;
  padding: 6px 14px;
  background: rgba(77,223,255,0.08);
  border: 1px solid var(--cyan);
  border-radius: 100px;
  font-family: var(--ff-mono);
  font-size: 11px;
  letter-spacing: 2px;
  color: var(--cyan);
  margin-bottom: 16px;
}
.timeline__year {
  display: block;
  font-family: var(--ff-mono);
  font-size: 32px;
  font-weight: 700;
  color: var(--tx-0);
  margin-bottom: 32px;
  letter-spacing: -1px;
}
.timeline__list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.timeline__list li {
  position: relative;
  padding-left: 24px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--tx-1);
}
.timeline__list li::before {
  content: '';
  position: absolute;
  left: 0; top: 9px;
  width: 6px; height: 6px;
  border: 1px solid var(--cyan);
  background: transparent;
}

/* ---------- 联系我们 ---------- */
.contact {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.contact__card {
  padding: 32px 36px;
  background: var(--bg-1);
  transition: background 0.2s ease;
}
.contact__card:hover { background: var(--bg-2); }
.contact__card--wide { grid-column: 1 / -1; }
.contact__k {
  display: block;
  font-family: var(--ff-mono);
  font-size: 11px;
  letter-spacing: 2px;
  color: var(--tx-3);
  margin-bottom: 12px;
  text-transform: uppercase;
}
.contact__v {
  display: block;
  font-size: 18px;
  color: var(--tx-0);
  font-weight: 500;
}
.contact__v--mono {
  font-family: var(--ff-mono);
  letter-spacing: 1px;
}

/* ---------- 页脚 ---------- */
.footer {
  padding: 60px 0 40px;
  border-top: 1px solid var(--line);
  background: var(--bg-0);
}
.footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 32px;
}
.footer__brand {
  display: flex;
  align-items: center;
  gap: 16px;
}
.footer__logo { width: 40px; height: 40px; opacity: 0.8; }
.footer__name {
  font-family: var(--ff-serif);
  font-size: 16px;
  font-weight: 600;
  color: var(--tx-0);
  margin-bottom: 4px;
}
.footer__name-en {
  font-family: var(--ff-mono);
  font-size: 10px;
  letter-spacing: 1.5px;
  color: var(--tx-3);
}
.footer__meta {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 12px;
  color: var(--tx-3);
  text-align: center;
}
.footer__sep {
  color: var(--line-strong);
}

/* ---------- 动画辅助类 ---------- */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}
.fade-in.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 响应式 ---------- */
@media (max-width: 1200px) {
  :root {
    --container: 100%;
    --gutter: 24px;
  }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .stat { border-bottom: 1px solid var(--line); }
  .stat:nth-child(odd) { border-right: 1px solid var(--line); }
  .stat:last-child { border-right: 0; }
  .roles { grid-template-columns: 1fr; }
  .impact { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .section { padding: 80px 0; }
  .sec-head { margin-bottom: 48px; }

  .nav__menu {
    position: fixed;
    top: 68px; left: 0; right: 0;
    flex-direction: column;
    gap: 0;
    background: rgba(5,7,13,0.98);
    backdrop-filter: blur(20px);
    padding: 24px 0;
    border-bottom: 1px solid var(--line);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s ease;
  }
  .nav__menu.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .nav__link {
    padding: 14px var(--gutter);
    border-bottom: 1px solid var(--line);
  }
  .nav__link::after { display: none; }
  .nav__toggle { display: flex; }

  .hero {
    min-height: 90vh;
    padding: 100px 0 60px;
  }
  .hero__meta { gap: 32px; }
  .hero__meta-item { padding: 0 16px; }
  .hero__meta-item:not(:last-child)::after { right: -16px; }
  .hero__corner { display: none; }

  .duo { grid-template-columns: 1fr; }
  .stats { grid-template-columns: 1fr; }
  .stat { border-right: 0; border-bottom: 1px solid var(--line); }
  .stat:last-child { border-bottom: 0; }
  .flow { grid-template-columns: 1fr; }
  .security { grid-template-columns: 1fr; }
  .timeline { grid-template-columns: 1fr; }
  .contact { grid-template-columns: 1fr; }
  .region__list { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
  .hero__lead { font-size: 14px; }
  .hero__meta { flex-direction: column; gap: 20px; }
  .hero__meta-item::after { display: none; }
  .duo__card, .role, .flow__step, .security__item, .timeline__col, .impact__main {
    padding: 32px 24px;
  }
  .region__list { grid-template-columns: 1fr; }
}