/* ============================================================
   首页 index.css —— 壹捌玖网络科技 首页专属样式
   布局：全屏视差 Hero / 错位巨卡优势 / 暗场数字 / 斜排服务卡 /
   暗场行业胶囊 / 宽幅案例 / 横向流程时间线 / 新闻四列表 / CTA
   ============================================================ */

/* ---------- 1. 全屏视差 Hero ---------- */
.hero{
  position:relative;min-height:100vh;display:flex;align-items:center;
  overflow:hidden;background:var(--ink);
}
.hero-bg{background-position:center 30%}
.hero-veil{
  position:absolute;inset:0;z-index:1;
  background:
    linear-gradient(100deg,rgba(20,20,20,.88) 0%,rgba(20,20,20,.62) 46%,rgba(20,20,20,.28) 100%),
    linear-gradient(0deg,rgba(20,20,20,.5),transparent 40%);
}
.hero-deco{position:absolute;inset:0;z-index:2;pointer-events:none}
.h-ring{
  position:absolute;border-radius:50%;
  border:1px solid rgba(201,168,124,.35);
}
.h-ring-1{width:520px;height:520px;right:-120px;top:-160px}
.h-ring-2{width:300px;height:300px;right:180px;bottom:-90px;border-color:rgba(201,168,124,.22)}
.h-grid{
  position:absolute;left:-4%;bottom:8%;width:46%;height:240px;
  background-image:
    linear-gradient(rgba(201,168,124,.14) 1px,transparent 1px),
    linear-gradient(90deg,rgba(201,168,124,.14) 1px,transparent 1px);
  background-size:44px 44px;
  mask-image:linear-gradient(90deg,rgba(0,0,0,.7),transparent);
}
.hero-inner{position:relative;z-index:3;padding-top:120px;padding-bottom:90px;max-width:900px;margin-left:0}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  color:var(--coffee-bright);font-size:14px;font-weight:700;letter-spacing:.28em;
  margin-bottom:26px;opacity:0;animation:fadeUp .7s .15s ease forwards;
}
.hero-eyebrow::before{content:"";width:34px;height:2px;background:var(--grad-coffee)}
.hero-title{
  color:#fff;font-size:clamp(42px,7vw,84px);font-weight:900;line-height:1.08;
  letter-spacing:-.02em;margin-bottom:24px;
}
.ht-line{display:block;overflow:hidden;opacity:0}
.ht-line:nth-child(1){animation:slideUp .8s .3s cubic-bezier(.22,.68,.4,1) forwards}
.ht-line:nth-child(2){animation:slideUp .8s .48s cubic-bezier(.22,.68,.4,1) forwards}
.ht-gold{color:var(--coffee);position:relative}
.ht-gold::after{
  content:"";position:absolute;left:0;right:0;bottom:.04em;height:.14em;
  background:linear-gradient(90deg,var(--coffee),transparent);border-radius:2px;
}
@keyframes slideUp{from{opacity:0;transform:translateY(46px)}to{opacity:1;transform:none}}
@keyframes fadeUp{from{opacity:0;transform:translateY(22px)}to{opacity:1;transform:none}}
.hero-sub{
  color:#D8CFBF;font-size:clamp(15px,1.8vw,19px);line-height:1.9;
  margin-bottom:36px;opacity:0;animation:fadeUp .7s .68s ease forwards;
}
.hero-cta{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin-bottom:34px;opacity:0;animation:fadeUp .7s .86s ease forwards}
.hero-tags{display:flex;gap:26px;flex-wrap:wrap;opacity:0;animation:fadeUp .7s 1s ease forwards}
.hero-tags li{
  display:flex;align-items:center;gap:9px;color:#EDE6DA;font-size:14px;font-weight:600;
}
.hero-tags li::before{
  content:"";width:7px;height:7px;border-radius:50%;
  background:var(--grad-coffee);box-shadow:0 0 0 4px rgba(201,168,124,.16);
}
/* 滚动提示 */
.scroll-hint{
  position:absolute;left:50%;bottom:26px;transform:translateX(-50%);
  width:26px;height:44px;border:2px solid rgba(255,255,255,.4);border-radius:14px;
  z-index:4;display:flex;justify-content:center;padding-top:8px;
}
.scroll-hint span{
  width:3px;height:9px;border-radius:3px;background:#fff;
  animation:hintDrop 1.8s ease infinite;
}
@keyframes hintDrop{
  0%{opacity:0;transform:translateY(0)}
  35%{opacity:1}
  100%{opacity:0;transform:translateY(14px)}
}
@media (max-width:1024px){
  .hero{min-height:92vh}
  .hero-inner{padding-top:110px}
  .h-grid{display:none}
}
@media (max-width:640px){
  .hero-title{font-size:38px}
  .hero-cta .btn{width:100%}
  .scroll-hint{display:none}
}

/* ---------- 2. 核心优势（错位巨卡） ---------- */
.features{background:linear-gradient(180deg,#fff 0%,var(--coffee-bg) 100%)}
.f-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:26px;
  align-items:start;max-width:1120px;margin:0 auto;
}
.f-card{
  position:relative;background:#fff;border:1px solid var(--line);
  border-radius:22px;padding:38px 30px 34px;
  box-shadow:var(--shadow-sm);transition:all .45s cubic-bezier(.22,.68,.4,1);
  overflow:hidden;
}
.f-card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:4px;
  background:var(--grad-coffee);transform:scaleX(0);transform-origin:left;
  transition:transform .45s;
}
.f-card:hover{transform:translateY(-10px);box-shadow:var(--shadow-lg)}
.f-card:hover::before{transform:scaleX(1)}
.f-tall{margin-top:56px}
.f-card:nth-child(2){margin-top:28px}
.f-card:nth-child(3){margin-top:0}
.f-card:nth-child(4){margin-top:56px}
.f-card:nth-child(5){margin-top:28px}
.f-card:nth-child(6){margin-top:0}
.f-num{
  position:absolute;top:22px;right:26px;
  font-size:44px;font-weight:900;color:var(--coffee-bg);letter-spacing:-.03em;
}
.f-icon{
  width:58px;height:58px;border-radius:16px;margin-bottom:20px;
  background:var(--grad-coffee);color:#fff;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 10px 24px rgba(169,136,89,.35);
}
.f-icon svg{width:28px;height:28px}
.f-card h3{font-size:19px;margin-bottom:12px}
.f-card p{font-size:14px;color:var(--text-2);line-height:1.85}
@media (max-width:1024px){
  .f-grid{grid-template-columns:1fr 1fr}
  .f-tall,.f-card:nth-child(n){margin-top:0}
}
@media (max-width:640px){
  .f-grid{grid-template-columns:1fr}
}

/* ---------- 3. 数据数字条（暗场视差） ---------- */
.nums{position:relative;overflow:hidden;padding:96px 0;background:var(--ink)}
.nums-bg{background-position:center 60%}
.nums-veil{position:absolute;inset:0;background:rgba(20,20,20,.82);z-index:1}
.nums-inner{
  position:relative;z-index:2;display:grid;grid-template-columns:repeat(4,1fr);
  gap:24px;text-align:center;
}
.num-item{position:relative;padding:10px 6px}
.num-item::after{
  content:"";position:absolute;right:-12px;top:20%;bottom:20%;width:1px;
  background:linear-gradient(rgba(201,168,124,.4),transparent);
}
.num-item:last-child::after{display:none}
.num-item b{
  display:block;font-size:clamp(40px,5vw,60px);font-weight:900;color:#fff;
  line-height:1.1;margin-bottom:10px;
  font-variant-numeric:tabular-nums;
}
.num-item span{color:var(--coffee-bright);font-size:14px;letter-spacing:.12em}
@media (max-width:768px){
  .nums-inner{grid-template-columns:1fr 1fr;gap:36px}
  .num-item:nth-child(2)::after{display:none}
}

/* ---------- 4. 建站服务预览（斜排卡片） ---------- */
.services{background:#fff}
.sv-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.sv-card{
  position:relative;border-radius:20px;overflow:hidden;display:block;
  background:var(--ink);box-shadow:var(--shadow-sm);
  transition:all .45s cubic-bezier(.22,.68,.4,1);
}
.sv-lift{margin-top:44px}
.sv-card img{width:100%;height:230px;object-fit:cover;transition:transform .6s;opacity:.92}
.sv-card:hover{transform:translateY(-10px) rotate(-.4deg);box-shadow:var(--shadow-lg)}
.sv-card:hover img{transform:scale(1.08);opacity:1}
.sv-body{
  position:absolute;left:0;right:0;bottom:0;padding:26px 24px 22px;
  background:linear-gradient(0deg,rgba(20,20,20,.94) 30%,rgba(20,20,20,.35) 70%,transparent);
  color:#fff;
}
.sv-body h3{color:#fff;font-size:19px;margin-bottom:6px}
.sv-body p{font-size:13px;color:#C9C0AF;line-height:1.7;margin-bottom:10px}
.sv-more{font-size:13px;font-weight:800;color:var(--coffee-bright);display:inline-flex;align-items:center;gap:6px}
.sv-more::after{content:"→";transition:transform .3s}
.sv-card:hover .sv-more::after{transform:translateX(4px)}
@media (max-width:1024px){
  .sv-grid{grid-template-columns:1fr 1fr}
  .sv-lift{margin-top:0}
}
@media (max-width:640px){
  .sv-grid{grid-template-columns:1fr}
}

/* ---------- 5. 行业方案（暗场胶囊网格） ---------- */
.indus{background:var(--ink);color:#E9E2D6;overflow:hidden}
.indus .sec-title{color:#fff}
.indus-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-bottom:44px;
}
.indus-chip{
  position:relative;display:flex;align-items:center;gap:12px;
  background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.09);
  border-radius:100px;padding:8px 18px 8px 8px;
  color:#EDE6DA;font-size:14px;font-weight:700;
  transition:all .35s;
}
.indus-chip i{
  width:38px;height:38px;border-radius:50%;flex-shrink:0;
  background-size:cover;background-position:center;
  border:2px solid rgba(201,168,124,.55);
}
.indus-chip:hover{background:rgba(201,168,124,.16);border-color:var(--coffee);transform:translateY(-4px);color:#fff}
.indus-chip:hover i{border-color:var(--coffee-bright)}
.indus-more{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
@media (max-width:1024px){.indus-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:560px){.indus-grid{grid-template-columns:1fr}}

/* ---------- 6. 案例展示（宽幅卡） ---------- */
.cases{background:var(--coffee-bg)}
.case-grid{display:grid;grid-template-columns:1.1fr 1fr 1fr;gap:24px;align-items:stretch}
.case-card{
  position:relative;background:#fff;border-radius:20px;overflow:hidden;
  box-shadow:var(--shadow-sm);transition:all .45s cubic-bezier(.22,.68,.4,1);
  padding-bottom:24px;
}
.case-card:hover{transform:translateY(-10px);box-shadow:var(--shadow-lg)}
.case-card img{width:100%;height:200px;object-fit:cover;transition:transform .6s}
.case-card:hover img{transform:scale(1.07)}
.case-mid{margin-top:36px}
.case-tag{
  position:absolute;top:16px;left:16px;
  background:rgba(20,20,20,.82);color:var(--coffee-bright);
  font-size:12px;font-weight:800;letter-spacing:.1em;padding:6px 14px;border-radius:100px;
  backdrop-filter:blur(4px);
}
.case-card h3{font-size:17px;padding:18px 22px 6px}
.case-card h3 a:hover{color:var(--coffee-deep)}
.case-card p{font-size:13px;color:var(--text-2);padding:0 22px;line-height:1.75}
@media (max-width:1024px){
  .case-grid{grid-template-columns:1fr 1fr}
  .case-mid{margin-top:0}
}
@media (max-width:640px){.case-grid{grid-template-columns:1fr}}

/* ---------- 7. 开发流程（横向时间线） ---------- */
.flow{background:#fff}
.flow-line{
  display:grid;grid-template-columns:repeat(4,1fr);gap:22px;
  position:relative;max-width:1080px;margin:0 auto;
}
.flow-line::before{
  content:"";position:absolute;top:34px;left:8%;right:8%;height:2px;
  background:linear-gradient(90deg,var(--coffee),var(--coffee-bg));
}
.flow-line li{
  position:relative;text-align:center;padding-top:86px;
}
.fl-dot{
  position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:70px;height:70px;border-radius:50%;
  background:var(--ink);color:var(--coffee-bright);
  display:flex;align-items:center;justify-content:center;
  font-size:20px;font-weight:900;
  border:6px solid var(--coffee-bg);
  box-shadow:0 8px 24px rgba(20,20,20,.25);
  z-index:2;transition:all .4s;
}
.flow-line li:hover .fl-dot{background:var(--grad-coffee);color:#fff;transform:translateX(-50%) scale(1.08)}
.flow-line h3{font-size:17px;margin-bottom:10px}
.flow-line p{font-size:13px;color:var(--text-2);line-height:1.8;max-width:230px;margin:0 auto}
.flow-cta{text-align:center;margin-top:52px}
@media (max-width:1024px){
  .flow-line{grid-template-columns:1fr 1fr;gap:40px}
  .flow-line::before{display:none}
}
@media (max-width:640px){.flow-line{grid-template-columns:1fr}}

/* ---------- 8. 新闻资讯（四列表） ---------- */
.news{background:var(--coffee-bg)}
.nl-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-bottom:40px;
}
.nl-grid-sm{grid-template-columns:repeat(3,1fr)}
.nl-card{
  background:#fff;border-radius:18px;overflow:hidden;
  box-shadow:var(--shadow-sm);transition:all .4s cubic-bezier(.22,.68,.4,1);
  display:flex;flex-direction:column;
}
.nl-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg)}
.nl-img{display:block;overflow:hidden}
.nl-img img{width:100%;height:180px;object-fit:cover;transition:transform .6s}
.nl-card:hover .nl-img img{transform:scale(1.08)}
.nl-body{padding:20px 22px 22px;flex:1;display:flex;flex-direction:column}
.nl-title{font-size:16px;line-height:1.5;margin-bottom:10px}
.nl-title a:hover{color:var(--coffee-deep)}
.nl-desc{
  font-size:13px;color:var(--text-2);line-height:1.8;
  flex:1;margin-bottom:14px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.nl-time{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;color:var(--coffee-deep);font-weight:700;
}
.nl-time::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--grad-coffee)}
@media (max-width:1024px){
  .nl-grid,.nl-grid-sm{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  .nl-grid,.nl-grid-sm{grid-template-columns:1fr}
}

/* ---------- 9. 转化 CTA ---------- */
.cta{position:relative;overflow:hidden;background:var(--ink);padding:130px 0}
.cta-bg{background-position:center 40%}
.cta-veil{position:absolute;inset:0;background:rgba(20,20,20,.78);z-index:1}
.cta-inner{position:relative;z-index:2;text-align:center}
.cta-title{color:#fff;font-size:clamp(26px,4vw,42px);font-weight:900;margin-bottom:18px}
.cta-sub{color:#D8CFBF;font-size:16px;margin-bottom:38px}
.cta-row{display:flex;justify-content:center;gap:16px;flex-wrap:wrap}
@media (max-width:640px){.cta-row .btn{width:100%}}