/* 首页样式 v2（2026-09-08 整体升级） */

/* ===== Hero：沉浸式主视觉 ===== */
.hero{min-height:520px;display:flex;align-items:center;background:
  radial-gradient(ellipse 65% 55% at 20% 10%,rgba(212,160,23,.13),transparent 55%),
  radial-gradient(ellipse 55% 50% at 85% 85%,rgba(64,90,160,.28),transparent 60%),
  linear-gradient(180deg,#0b101d 0%,#080b12 100%);
  overflow:hidden;position:relative;}
.hero::after{content:'';position:absolute;bottom:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,rgba(212,160,23,.35),transparent);}
.hero-inner{display:flex;align-items:center;justify-content:center;padding:60px 24px;max-width:1180px;margin:0 auto;position:relative;z-index:1;}
.hero-copy{flex:1;width:100%;min-width:300px;text-align:center;max-width:760px;}
.hero-tag{display:inline-flex;align-items:center;gap:8px;padding:8px 18px;border-radius:30px;background:rgba(212,160,23,.1);border:1px solid rgba(212,160,23,.28);color:var(--gold-2);font-size:13px;font-weight:600;letter-spacing:1.5px;margin-bottom:26px;}
.hero-tag::before{content:'';width:7px;height:7px;border-radius:50%;background:var(--gold-2);animation:pulse 2s infinite;}
.hero h1{font-size:52px;font-weight:900;line-height:1.2;margin-bottom:22px;letter-spacing:-1.5px;}
.hero h1 .grad{background:var(--gold-grad);-webkit-background-clip:text;background-clip:text;color:transparent;}
.hero-sub{font-size:17px;color:var(--txt-2);max-width:560px;margin:0 auto 34px;line-height:1.9;}
.hero-btns{display:flex;gap:16px;align-items:center;flex-wrap:wrap;justify-content:center;margin-bottom:44px;}
.hero-points{display:flex;gap:14px 30px;justify-content:center;flex-wrap:wrap;border-top:1px solid var(--line);padding-top:26px;}
.hero-point{display:flex;align-items:center;gap:10px;color:var(--txt-2);font-size:14px;font-weight:600;}
.hero-point .hp{width:38px;height:38px;border-radius:11px;background:var(--bg-3);border:1px solid var(--line-2);display:flex;align-items:center;justify-content:center;font-size:18px;transition:all .25s;}
.hero-point:hover .hp{border-color:rgba(212,160,23,.45);transform:translateY(-2px);}

@media(max-width:900px){.hero{min-height:auto;padding:46px 0}.hero h1{font-size:40px}}
@media(max-width:600px){.hero h1{font-size:32px}.hero-sub{font-size:15.5px}.hero-points{gap:10px 20px}}

/* ===== 首页 section 头部（左对齐 + 分隔线） ===== */
.section-head{position:relative;padding-left:18px;border-left:3px solid var(--gold-grad);}
.section-eyebrow{margin-bottom:10px;}
.section-title{margin-bottom:10px;}
.section-sub{color:var(--txt-2);}

/* ===== 双 Tab（外贸问答 / AI 真实案例） ===== */
.qa-tabs{display:inline-flex;gap:6px;margin-top:10px;padding:5px;background:var(--bg-2);border:1px solid var(--line);border-radius:12px;}
.qa-tab{appearance:none;background:transparent;border:none;color:var(--txt-2);font-size:14px;font-weight:700;padding:9px 26px;border-radius:9px;cursor:pointer;transition:all .25s;}
.qa-tab:hover{color:var(--txt);}
.qa-tab.on{color:#15180f;background:var(--gold-grad);box-shadow:var(--shadow-gold);}
.qa-pane{display:none;padding-top:8px}
.qa-pane.on{display:block;animation:slideIn .4s cubic-bezier(.16,1,.3,1)}
.cta-row{display:flex;gap:14px;justify-content:center;margin-top:30px;flex-wrap:wrap}

/* ===== 热门外贸问答 ===== */
.qa-list{margin-top:24px;display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.qa-list a{display:flex;flex-direction:column;justify-content:space-between;gap:12px;padding:18px 18px;background:var(--card-grad);border:1px solid var(--line);border-radius:12px;text-decoration:none;color:var(--txt);transition:all .3s;}
.qa-list a:hover{transform:translateY(-4px);border-color:rgba(212,160,23,.45);box-shadow:var(--shadow-sm);background:var(--card-hover)}
.qa-list .q-q{display:flex;gap:10px;font-size:14px;color:var(--txt);line-height:1.6;}
.qa-list .q-q i{font-style:normal;flex-shrink:0;width:24px;height:24px;border-radius:8px;background:rgba(212,160,23,.12);border:1px solid rgba(212,160,23,.28);color:var(--gold-2);font-size:11.5px;font-weight:700;display:flex;align-items:center;justify-content:center}
.qa-list a:hover .q-q i{background:var(--gold-grad);color:#15180f}
.qa-list .lq{color:var(--txt-3);font-size:12px;white-space:nowrap}
@media(max-width:900px){.qa-list{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.qa-list{grid-template-columns:1fr}.qa-list .lq{display:none}}

/* ===== 案例筛选 chips ===== */
.qa-chips{display:flex;flex-wrap:wrap;gap:8px;margin:22px 0 4px}
.qa-chip{appearance:none;background:rgba(255,255,255,.04);border:1px solid var(--line-2);color:var(--txt-2);font-size:12.5px;padding:6px 14px;border-radius:20px;cursor:pointer;transition:all .22s;font-weight:600}
.qa-chip:hover{color:var(--txt);border-color:rgba(212,160,23,.35)}
.qa-chip.on{background:linear-gradient(135deg,rgba(212,160,23,.2),rgba(212,160,23,.1));border-color:var(--gold-2);color:var(--gold-2)}
.ex-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:18px}
.ex-card{background:var(--card-grad);border:1px solid var(--line);border-radius:14px;padding:20px;display:flex;flex-direction:column;transition:all .3s;text-decoration:none}
.ex-card:hover{transform:translateY(-4px);border-color:rgba(212,160,23,.4);box-shadow:var(--shadow-sm)}
.ex-card-tags{display:flex;gap:6px;margin-bottom:10px;align-items:center}
.ex-card-tags span{font-size:11px;padding:2px 8px;border-radius:5px;background:rgba(255,255,255,.05);color:var(--txt-3)}
.ex-card h3{font-size:15px;font-weight:700;color:var(--txt);line-height:1.5;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.ex-card p{font-size:13px;color:var(--txt-2);line-height:1.7;flex:1;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.ex-link{color:var(--gold-2);font-size:13px;font-weight:700;margin-top:14px}
@media(max-width:900px){.ex-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.ex-grid{grid-template-columns:1fr}}

/* ===== 案例工具徽章 ===== */
.ex-tool-badge{display:inline-block;font-size:11px;font-weight:700;padding:3px 9px;border-radius:5px;color:#fff}
.ex-tool-aicopy{background:#d97706}
.ex-tool-ai-inquiry{background:#0284c7}
.ex-tool-ai-email{background:#7c3aed}
.ex-tool-ai-verify{background:#059669}
.ex-tool-ai-guide{background:#dc2626}
.ex-tool-ai-image{background:#db2777}

@keyframes slideIn{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}

/* ===== Hero 轮播 v2（淡入淡出切换） ===== */
.hs-slide{display:none;opacity:0;transform:translateY(14px);transition:opacity .6s cubic-bezier(.16,1,.3,1),transform .6s cubic-bezier(.16,1,.3,1);}
.hs-slide.on{opacity:1;transform:none;}
.hs-dots{display:flex;justify-content:center;gap:10px;margin-top:30px;}
.hs-dot{width:26px;height:4px;border-radius:3px;background:rgba(255,255,255,.18);cursor:pointer;transition:all .35s;position:relative;overflow:hidden;}
.hs-dot::after{content:'';position:absolute;inset:0;background:var(--gold-grad);border-radius:3px;transform:scaleX(0);transform-origin:left;transition:transform .45s cubic-bezier(.16,1,.3,1);}
.hs-dot.on{width:44px;background:rgba(212,160,23,.25);}
.hs-dot.on::after{transform:scaleX(1);}