/* ============================================================
   四川隆泰同供应链管理有限公司 · 官网样式
   风格：简约大气 / 响应式
   ============================================================ */

:root {
  --green-900: #0f3d33;
  --green-700: #17594a;
  --green-600: #1c6a57;
  --green-500: #2a8568;
  --gold:      #c9a24b;
  --gold-soft: #e7d09a;
  --ink:       #1c2620;
  --ink-2:     #4f6157;
  --ink-3:     #8a978f;
  --line:      #e4e9e6;
  --bg:        #ffffff;
  --bg-soft:   #f6f8f7;
  --bg-deep:   #0f3d33;
  --radius:    14px;
  --shadow:    0 18px 50px -28px rgba(15, 61, 51, .35);
  --maxw:      1200px;
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---------- 顶部条 ---------- */
.topbar {
  background: var(--green-900);
  color: rgba(255, 255, 255, .82);
  font-size: 13px;
}
.topbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 40px;
}
.topbar a:hover { color: var(--gold-soft); }
.topbar .tb-left span { margin-right: 22px; }
.topbar .tb-left i { color: var(--gold); font-style: normal; margin-right: 6px; }

/* ---------- 头部导航 ---------- */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand .logo {
  width: 42px; height: 42px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--green-600), var(--green-900));
  color: #fff;
  display: grid; place-items: center;
  font-weight: 800; font-size: 18px;
  letter-spacing: 1px;
  box-shadow: var(--shadow);
}
.brand .name { font-weight: 700; font-size: 17px; line-height: 1.25; }
.brand .name small { display: block; font-weight: 400; font-size: 11px; color: var(--ink-3); letter-spacing: 1.5px; }

.nav { display: flex; align-items: center; gap: 4px; }
.nav a {
  position: relative;
  padding: 10px 16px;
  font-size: 15px;
  color: var(--ink-2);
  border-radius: 8px;
  transition: color .2s, background .2s;
}
.nav a:hover { color: var(--green-700); background: var(--bg-soft); }
.nav a.active { color: var(--green-700); font-weight: 600; }
.nav a.active::after {
  content: "";
  position: absolute;
  left: 16px; right: 16px; bottom: 2px;
  height: 2px;
  background: var(--gold);
  border-radius: 2px;
}

.nav-toggle {
  display: none;
  width: 44px; height: 44px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  cursor: pointer;
  position: relative;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 11px;
  width: 22px; height: 2px;
  background: var(--green-700);
  border-radius: 2px;
  transition: .25s;
}
.nav-toggle span { top: 21px; }
.nav-toggle span::before { top: -7px; }
.nav-toggle span::after { top: 7px; }

/* ---------- 通用区块 ---------- */
.section { padding: 92px 0; }
.section.soft { background: var(--bg-soft); }
.section-head { max-width: 720px; margin: 0 auto 56px; text-align: center; }
.eyebrow {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--green-600);
  font-weight: 700;
  margin-bottom: 14px;
}
.section-head h2 {
  font-size: clamp(26px, 3.4vw, 38px);
  color: var(--green-900);
  letter-spacing: 1px;
  font-weight: 800;
}
.section-head p { margin-top: 16px; color: var(--ink-2); font-size: 16px; }

/* ---------- 首页 HERO ---------- */
.hero {
  position: relative;
  color: #fff;
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(42,133,104,.55), transparent 60%),
    linear-gradient(135deg, #0c342b 0%, #14513f 55%, #1c6a57 100%);
  overflow: hidden;
}
.hero::after {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: radial-gradient(circle at 70% 30%, #000, transparent 75%);
}
.hero .container { position: relative; z-index: 2; padding: 116px 24px 128px; }
.hero .tag {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 7px 16px;
  border: 1px solid rgba(201,162,75,.5);
  border-radius: 999px;
  color: var(--gold-soft);
  font-size: 13px; letter-spacing: 1px;
  margin-bottom: 26px;
}
.hero h1 {
  font-size: clamp(32px, 5vw, 58px);
  line-height: 1.15;
  font-weight: 800;
  letter-spacing: 1px;
  max-width: 16em;
}
.hero h1 .hl { color: var(--gold-soft); }
.hero p.lead {
  margin: 26px 0 38px;
  max-width: 42em;
  font-size: 17px;
  color: rgba(255,255,255,.82);
}
.hero .actions { display: flex; flex-wrap: wrap; gap: 16px; }

.btn {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 14px 28px;
  border-radius: 999px;
  font-size: 15px; font-weight: 600;
  cursor: pointer;
  transition: transform .15s, box-shadow .2s, background .2s;
  border: 1px solid transparent;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--gold); color: #3a2c05; box-shadow: 0 14px 30px -12px rgba(201,162,75,.7); }
.btn-ghost { background: rgba(255,255,255,.08); color: #fff; border-color: rgba(255,255,255,.3); }
.btn-ghost:hover { background: rgba(255,255,255,.16); }

/* HERO 数据条 */
.hero-stats {
  position: relative; z-index: 2;
  display: grid; grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid rgba(255,255,255,.12);
}
.hero-stats .item { padding: 30px 24px; text-align: center; border-right: 1px solid rgba(255,255,255,.1); }
.hero-stats .item:last-child { border-right: none; }
.hero-stats .num { font-size: 32px; font-weight: 800; color: #fff; }
.hero-stats .num span { color: var(--gold-soft); }
.hero-stats .lbl { margin-top: 6px; font-size: 13px; color: rgba(255,255,255,.7); letter-spacing: 1px; }

/* ---------- 卡片网格 ---------- */
.grid { display: grid; gap: 26px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 34px 30px;
  transition: transform .2s, box-shadow .25s, border-color .2s;
  height: 100%;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: transparent; }
.card .ico {
  width: 54px; height: 54px;
  border-radius: 13px;
  background: linear-gradient(135deg, var(--green-500), var(--green-900));
  color: #fff;
  display: grid; place-items: center;
  font-size: 24px;
  margin-bottom: 20px;
}
.card h3 { font-size: 19px; color: var(--green-900); margin-bottom: 10px; }
.card p { color: var(--ink-2); font-size: 14.5px; }

/* 概况双栏 */
.split { display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center; }
.split .media {
  border-radius: 18px;
  min-height: 380px;
  background:
    radial-gradient(600px 300px at 30% 20%, rgba(42,133,104,.6), transparent 60%),
    linear-gradient(135deg, #14513f, #0c342b);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow);
}
.split .media .badge {
  position: absolute; left: 28px; bottom: 28px;
  background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.25);
  backdrop-filter: blur(6px);
  color: #fff; padding: 16px 22px; border-radius: 14px;
}
.split .media .badge b { display: block; font-size: 26px; color: var(--gold-soft); }
.split .media .badge span { font-size: 13px; opacity: .85; }
.split h2 { font-size: clamp(24px, 3vw, 34px); color: var(--green-900); font-weight: 800; letter-spacing: 1px; }
.split p { margin: 18px 0; color: var(--ink-2); }
.feature-list { margin-top: 10px; }
.feature-list li { display: flex; gap: 12px; padding: 9px 0; color: var(--ink-2); }
.feature-list li::before { content: "✓"; color: var(--green-600); font-weight: 800; }

/* 优势 */
.advantage { text-align: center; }
.advantage .ico { margin: 0 auto 18px; }
.advantage h3 { font-size: 18px; }

/* CTA 条 */
.cta {
  background: linear-gradient(135deg, var(--green-700), var(--green-900));
  color: #fff;
  border-radius: 20px;
  padding: 60px 56px;
  display: flex; justify-content: space-between; align-items: center; gap: 30px;
  flex-wrap: wrap;
}
.cta h2 { font-size: clamp(24px, 3vw, 32px); font-weight: 800; }
.cta p { margin-top: 10px; color: rgba(255,255,255,.82); }

/* ---------- 关于我们 ---------- */
.timeline { position: relative; margin-top: 20px; padding-left: 26px; }
.timeline::before { content: ""; position: absolute; left: 7px; top: 6px; bottom: 6px; width: 2px; background: var(--line); }
.timeline li { position: relative; padding: 0 0 30px 22px; }
.timeline li::before { content: ""; position: absolute; left: -26px; top: 6px; width: 16px; height: 16px; border-radius: 50%; background: var(--gold); border: 3px solid #fff; box-shadow: 0 0 0 2px var(--green-600); }
.timeline .year { font-weight: 800; color: var(--green-700); }
.timeline p { color: var(--ink-2); margin-top: 2px; }

.value-grid .card { text-align: center; }
.value-grid .card .ico { margin: 0 auto 16px; }

/* ---------- 产品服务 ---------- */
.service-row {
  display: grid; grid-template-columns: 88px 1fr auto; gap: 26px; align-items: center;
  padding: 30px 32px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  margin-bottom: 18px;
  transition: transform .2s, box-shadow .25s, border-color .2s;
}
.service-row:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: transparent; }
.service-row .sno {
  width: 64px; height: 64px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--green-500), var(--green-900));
  color: #fff; font-weight: 800; font-size: 22px;
  display: grid; place-items: center;
}
.service-row h3 { font-size: 19px; color: var(--green-900); }
.service-row p { color: var(--ink-2); font-size: 14.5px; margin-top: 6px; }
.service-row .tags { display: flex; flex-wrap: wrap; gap: 8px; justify-content: flex-end; }
.service-row .tags span {
  font-size: 12.5px; color: var(--green-700);
  background: var(--bg-soft); border: 1px solid var(--line);
  padding: 5px 12px; border-radius: 999px;
}

.tabs { display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; margin-bottom: 40px; }
.tab {
  padding: 11px 22px; border-radius: 999px; border: 1px solid var(--line);
  background: #fff; color: var(--ink-2); cursor: pointer; font-size: 14.5px; font-weight: 600;
  transition: .2s;
}
.tab.active { background: var(--green-700); color: #fff; border-color: var(--green-700); }

/* ---------- 联系我们 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 40px; }
.contact-info .info-item {
  display: flex; gap: 16px; padding: 20px 0; border-bottom: 1px solid var(--line);
}
.contact-info .info-item .ico {
  flex: none; width: 46px; height: 46px; border-radius: 12px;
  background: var(--bg-soft); color: var(--green-700); display: grid; place-items: center; font-size: 20px;
}
.contact-info .info-item b { display: block; color: var(--green-900); font-size: 15px; }
.contact-info .info-item span { color: var(--ink-2); font-size: 14.5px; }

.form-card { background: #fff; border: 1px solid var(--line); border-radius: 18px; padding: 36px; box-shadow: var(--shadow); }
.field { margin-bottom: 20px; }
.field label { display: block; font-size: 14px; color: var(--ink-2); margin-bottom: 8px; font-weight: 600; }
.field input, .field textarea, .field select {
  width: 100%; padding: 13px 15px; border: 1px solid var(--line); border-radius: 10px;
  font-family: inherit; font-size: 15px; color: var(--ink); background: var(--bg-soft);
  transition: border-color .2s, background .2s;
}
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none; border-color: var(--green-600); background: #fff;
}
.field textarea { resize: vertical; min-height: 120px; }
.form-note { font-size: 13px; color: var(--ink-3); margin-top: 4px; }

.map {
  margin-top: 40px;
  height: 320px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background:
    repeating-linear-gradient(45deg, #eef3f1, #eef3f1 18px, #e7eeeb 18px, #e7eeeb 36px);
  display: grid; place-items: center;
  color: var(--ink-3); font-size: 15px; text-align: center;
  position: relative; overflow: hidden;
}
.map .pin { font-size: 30px; color: var(--green-600); margin-bottom: 8px; }

/* ---------- 页脚 ---------- */
.footer { background: var(--bg-deep); color: rgba(255,255,255,.78); padding: 64px 0 30px; }
.footer .cols { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 40px; }
.footer .brand .name { color: #fff; font-size: 18px; font-weight: 700; }
.footer .brand p { margin-top: 14px; font-size: 14px; color: rgba(255,255,255,.6); max-width: 30em; }
.footer h4 { color: #fff; font-size: 15px; margin-bottom: 18px; letter-spacing: 1px; }
.footer ul li { padding: 6px 0; font-size: 14px; }
.footer ul li a:hover { color: var(--gold-soft); }
.footer .bottom {
  margin-top: 44px; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.12);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px;
  font-size: 13px; color: rgba(255,255,255,.55);
}
.footer .bottom a { color: rgba(255,255,255,.7); }
.footer .bottom a:hover { color: var(--gold-soft); }

/* ---------- 响应式 ---------- */
@media (max-width: 980px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .split, .contact-grid { grid-template-columns: 1fr; gap: 36px; }
  .footer .cols { grid-template-columns: 1fr 1fr; gap: 30px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .hero-stats .item:nth-child(2) { border-right: none; }
  .cta { padding: 40px 32px; }
}
@media (max-width: 720px) {
  .topbar { display: none; }
  .nav { position: absolute; top: 74px; left: 0; right: 0;
    background: #fff; border-bottom: 1px solid var(--line);
    flex-direction: column; align-items: stretch; gap: 0;
    padding: 8px 0; max-height: 0; overflow: hidden; transition: max-height .3s; }
  .nav.open { max-height: 360px; }
  .nav a { padding: 14px 24px; border-radius: 0; }
  .nav a.active::after { display: none; }
  .nav-toggle { display: block; }
  .section { padding: 64px 0; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .footer .cols { grid-template-columns: 1fr; }
  .service-row { grid-template-columns: 64px 1fr; }
  .service-row .tags { grid-column: 1 / -1; justify-content: flex-start; margin-top: 4px; }
  .cta { flex-direction: column; align-items: flex-start; }
}