/* ============================================================
   华斯达光显 · 官网样式
   ============================================================ */
:root{
  --navy:#0b1530; --navy2:#12204a; --blue:#1f4fd8; --cyan:#22d3ee;
  --orange:#ff8a3d; --ink:#17203a; --muted:#5b6577; --line:#e4e8f2;
  --bg:#f5f7fb; --card:#ffffff; --grad:linear-gradient(120deg,#0b1530 0%,#16307a 55%,#1f4fd8 100%);
  --shadow:0 10px 30px rgba(16,32,74,.10);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"Microsoft YaHei","PingFang SC","Segoe UI",Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.75;font-size:15px}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
.container{max-width:1180px;margin:0 auto;padding:0 22px}

/* ---------- 顶部导航 ---------- */
.topbar{position:sticky;top:0;z-index:100;background:rgba(11,21,48,.92);backdrop-filter:blur(8px);color:#fff}
.topbar .container{display:flex;align-items:center;height:62px;gap:26px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:17px;letter-spacing:.5px;white-space:nowrap}
.logo .mark{width:34px;height:34px;border-radius:8px;background:linear-gradient(135deg,var(--cyan),var(--blue));display:flex;align-items:center;justify-content:center;font-size:15px;font-weight:800;color:#fff}
.logo small{display:block;font-size:10px;font-weight:400;opacity:.7;letter-spacing:1px}
.nav{display:flex;gap:4px;flex:1}
.nav a{padding:8px 14px;border-radius:8px;font-size:14px;color:#dbe4ff;transition:.2s}
.nav a:hover,.nav a.active{background:rgba(255,255,255,.12);color:#fff}
.top-cta{background:var(--orange);color:#fff;padding:9px 18px;border-radius:22px;font-size:13.5px;font-weight:600;white-space:nowrap;box-shadow:0 4px 14px rgba(255,138,61,.4)}
.top-cta:hover{filter:brightness(1.08)}
@media(max-width:900px){.nav{display:none}}

/* ---------- Hero ---------- */
.hero{position:relative;color:#fff;overflow:hidden}
.hero .bg{position:absolute;inset:0;background-size:cover;background-position:center;transform:scale(1.02)}
.hero .veil{position:absolute;inset:0;background:linear-gradient(100deg,rgba(8,14,34,.92) 0%,rgba(13,26,66,.78) 45%,rgba(15,30,80,.35) 100%)}
.hero .container{position:relative;padding-top:110px;padding-bottom:120px}
.hero h1{font-size:44px;line-height:1.25;font-weight:800;max-width:640px}
.hero h1 em{font-style:normal;color:var(--cyan)}
.hero .sub{margin-top:16px;font-size:17px;opacity:.92;max-width:560px}
.hero .sub-en{margin-top:6px;font-size:13px;opacity:.6;max-width:560px}
.hero .actions{margin-top:30px;display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 26px;border-radius:10px;font-size:15px;font-weight:600;cursor:pointer;border:none;transition:.2s}
.btn.primary{background:var(--orange);color:#fff}
.btn.ghost{background:rgba(255,255,255,.12);color:#fff;border:1px solid rgba(255,255,255,.35)}
.btn.primary:hover{transform:translateY(-2px);box-shadow:0 8px 22px rgba(255,138,61,.45)}
.btn.blue{background:var(--blue);color:#fff}
.hero-stats{position:relative;margin-top:64px;display:grid;grid-template-columns:repeat(4,1fr);gap:14px;max-width:860px}
.hero-stats .st{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.15);border-radius:14px;padding:18px 20px;backdrop-filter:blur(4px)}
.hero-stats .st b{display:block;font-size:22px;color:var(--cyan)}
.hero-stats .st span{font-size:12.5px;opacity:.85}
@media(max-width:760px){.hero h1{font-size:30px}.hero-stats{grid-template-columns:repeat(2,1fr)}.hero .container{padding-top:80px;padding-bottom:80px}}

/* ---------- 通用区块 ---------- */
section.block{padding:72px 0}
.sec-head{text-align:center;margin-bottom:42px}
.sec-head .kicker{display:inline-block;font-size:12.5px;letter-spacing:2px;color:var(--blue);font-weight:700;text-transform:uppercase;margin-bottom:10px}
.sec-head h2{font-size:30px;font-weight:800}
.sec-head p{color:var(--muted);margin-top:10px;max-width:640px;margin-left:auto;margin-right:auto}
.grid{display:grid;gap:20px}
.g2{grid-template-columns:1fr 1fr}.g3{grid-template-columns:repeat(3,1fr)}.g4{grid-template-columns:repeat(4,1fr)}
@media(max-width:960px){.g3,.g4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.g2,.g3,.g4{grid-template-columns:1fr}}

.card{background:var(--card);border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);overflow:hidden}
.card .pad{padding:24px}

/* 产品系列卡 */
.series-card{transition:.25s;cursor:pointer;display:flex;flex-direction:column}
.series-card:hover{transform:translateY(-5px);box-shadow:0 16px 40px rgba(16,32,74,.16)}
.series-card .thumb{height:230px;background-size:cover;background-position:center;position:relative}
.series-card .thumb .tag{position:absolute;left:14px;bottom:14px;background:rgba(11,21,48,.82);color:#fff;padding:5px 12px;border-radius:18px;font-size:12px}
.series-card h3{font-size:18px;margin-bottom:2px}
.series-card .en{font-size:11.5px;color:var(--muted);letter-spacing:.5px}
.series-card p{font-size:13.5px;color:var(--muted);margin-top:10px;flex:1}
.series-card .models{margin-top:12px;display:flex;flex-wrap:wrap;gap:6px}
.series-card .models span{background:#eef2fd;color:var(--blue);font-size:11.5px;padding:3px 10px;border-radius:6px;font-weight:600}

/* 特性 icon 网格 */
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:18px}
@media(max-width:640px){.feat-grid{grid-template-columns:repeat(2,1fr)}}
.feat{background:#f7f9ff;border:1px solid var(--line);border-radius:10px;padding:12px;text-align:center;font-size:13px}
.feat b{display:block;color:var(--blue);font-size:13.5px}

/* 高亮指标 */
.hl-row{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:18px}
.hl{background:var(--grad);color:#fff;border-radius:12px;padding:16px;text-align:center}
.hl b{font-size:19px;display:block;color:var(--cyan)}
.hl span{font-size:12px;opacity:.85}

/* 规格表 */
.spec-block{margin-top:34px}
.spec-block h4{font-size:16px;margin-bottom:4px}
.spec-block .note{color:var(--muted);font-size:12.5px;margin-bottom:12px}
.tbl-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:12px;background:#fff}
table.spec{width:100%;border-collapse:collapse;font-size:12.8px;min-width:640px}
table.spec th{background:#101c40;color:#fff;padding:9px 12px;text-align:left;white-space:nowrap;font-weight:600}
table.spec td{padding:8px 12px;border-top:1px solid var(--line);white-space:nowrap}
table.spec td:first-child{font-weight:600;color:var(--navy2);background:#f7f9ff}
table.spec tr:hover td{background:#fbfcff}

/* 产品页锚点导航 */
.subnav{position:sticky;top:62px;z-index:60;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 2px 10px rgba(16,32,74,.05)}
.subnav .container{display:flex;gap:8px;overflow-x:auto;padding:10px 22px}
.subnav a{white-space:nowrap;padding:7px 16px;border-radius:20px;font-size:13px;color:var(--muted);border:1px solid var(--line)}
.subnav a:hover,.subnav a.on{background:var(--blue);color:#fff;border-color:var(--blue)}

/* 优势 */
.adv{padding:26px}
.adv .no{font-size:30px;font-weight:800;color:rgba(31,79,216,.18)}
.adv h3{font-size:17px;margin:4px 0 2px}
.adv .en{font-size:11.5px;color:var(--muted)}
.adv p{font-size:13.5px;color:var(--muted);margin-top:10px}

/* 案例 */
.case-card{overflow:hidden}
.case-card .ph{height:200px;background-size:cover;background-position:center}
.case-card .meta{display:flex;justify-content:space-between;padding:14px 18px;font-size:13px;flex-wrap:wrap;gap:6px}
.case-card .meta b{color:var(--blue)}
.gallery{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
@media(max-width:900px){.gallery{grid-template-columns:repeat(2,1fr)}}
.gallery figure{position:relative;border-radius:12px;overflow:hidden;margin:0}
.gallery img{height:180px;width:100%;object-fit:cover;transition:.3s}
.gallery figure:hover img{transform:scale(1.05)}
.gallery figcaption{position:absolute;left:0;right:0;bottom:0;background:linear-gradient(transparent,rgba(8,14,34,.85));color:#fff;font-size:12px;padding:26px 12px 10px}

/* 时间线 */
.timeline{position:relative;padding-left:26px;border-left:2px solid #dfe5f3}
.tl-item{position:relative;padding-bottom:26px}
.tl-item::before{content:'';position:absolute;left:-33px;top:6px;width:12px;height:12px;border-radius:50%;background:var(--blue);box-shadow:0 0 0 4px #e6ecff}
.tl-item .y{font-weight:800;color:var(--blue);font-size:17px}
.tl-item p{font-size:13.5px;color:var(--muted)}

/* 表单 */
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media(max-width:640px){.form-grid{grid-template-columns:1fr}}
.field{display:flex;flex-direction:column;gap:6px}
.field label{font-size:13px;font-weight:600}
.field label i{color:var(--orange);font-style:normal}
.field input,.field select,.field textarea{border:1px solid #d5dbe8;border-radius:9px;padding:11px 13px;font-size:14px;font-family:inherit;background:#fff;transition:.2s}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px rgba(31,79,216,.12)}
.form-card{background:#fff;border-radius:18px;padding:30px;box-shadow:var(--shadow);border:1px solid var(--line)}
.form-ok{background:#e8f8f0;border:1px solid #bfe8d2;color:#177a4b;border-radius:10px;padding:14px 16px;font-size:14px;margin-top:14px}

/* 页脚 */
footer{background:var(--navy);color:#c6d0e8;margin-top:80px}
footer .top{display:grid;grid-template-columns:2fr 1fr 1fr 1.4fr;gap:30px;padding:54px 0 40px}
@media(max-width:860px){footer .top{grid-template-columns:1fr 1fr}}
footer h4{color:#fff;font-size:15px;margin-bottom:14px}
footer a{display:block;font-size:13px;padding:3px 0;opacity:.85}
footer a:hover{color:var(--cyan)}
footer .bottom{border-top:1px solid rgba(255,255,255,.12);padding:18px 0;font-size:12px;opacity:.7;text-align:center}

/* ---------- AI 悬浮助手 ---------- */
.ai-fab{position:fixed;right:22px;bottom:22px;z-index:200;width:62px;height:62px;border-radius:50%;background:linear-gradient(135deg,#1f4fd8,#22d3ee);color:#fff;border:none;cursor:pointer;box-shadow:0 10px 28px rgba(31,79,216,.45);display:flex;align-items:center;justify-content:center;flex-direction:column;gap:1px;font-size:10.5px}
.ai-fab .ic{font-size:20px}
.ai-fab .dot{position:absolute;top:4px;right:4px;width:12px;height:12px;border-radius:50%;background:#ff4d4f;border:2px solid #fff;animation:pulse 1.6s infinite}
@keyframes pulse{0%,100%{transform:scale(1)}50%{transform:scale(1.25)}}
.ai-panel{position:fixed;right:22px;bottom:96px;z-index:210;width:390px;max-width:calc(100vw - 32px);height:560px;max-height:calc(100vh - 130px);background:#fff;border-radius:18px;box-shadow:0 24px 60px rgba(10,20,50,.3);display:none;flex-direction:column;overflow:hidden;border:1px solid var(--line)}
.ai-panel.open{display:flex}
.ai-head{background:var(--grad);color:#fff;padding:14px 18px;display:flex;align-items:center;gap:10px}
.ai-head .av{width:36px;height:36px;border-radius:50%;background:rgba(255,255,255,.2);display:flex;align-items:center;justify-content:center;font-size:18px}
.ai-head b{font-size:15px;display:block}
.ai-head span{font-size:11px;opacity:.8;display:block}
.ai-head .close{margin-left:auto;background:none;border:none;color:#fff;font-size:20px;cursor:pointer;opacity:.8}
.ai-msgs{flex:1;overflow-y:auto;padding:16px;background:#f6f8fc;display:flex;flex-direction:column;gap:12px}
.msg{max-width:86%;padding:11px 14px;border-radius:14px;font-size:13.5px;white-space:pre-wrap;word-break:break-word;line-height:1.65}
.msg.bot{background:#fff;border:1px solid var(--line);border-bottom-left-radius:4px;align-self:flex-start;box-shadow:0 2px 8px rgba(16,32,74,.06)}
.msg.user{background:var(--blue);color:#fff;border-bottom-right-radius:4px;align-self:flex-end}
.msg .typing span{display:inline-block;width:6px;height:6px;border-radius:50%;background:#9aa7c4;margin-right:3px;animation:blink 1s infinite}
.msg .typing span:nth-child(2){animation-delay:.2s}.msg .typing span:nth-child(3){animation-delay:.4s}
@keyframes blink{0%,100%{opacity:.25}50%{opacity:1}}
.msg-card{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;width:88%;align-self:flex-start}
.msg-card .im{height:110px;background-size:cover;background-position:center}
.msg-card .bd{padding:10px 12px}
.msg-card b{font-size:13px}
.msg-card .lnk{color:var(--blue);font-size:12px;font-weight:600}
.quick-row{display:flex;flex-wrap:wrap;gap:8px;padding:0 16px 8px}
.quick-row button{background:#fff;border:1px solid #c9d4f2;color:var(--blue);font-size:12.5px;padding:7px 13px;border-radius:18px;cursor:pointer;transition:.15s}
.quick-row button:hover{background:var(--blue);color:#fff}
.ai-input{display:flex;gap:8px;padding:12px;border-top:1px solid var(--line);background:#fff}
.ai-input input{flex:1;border:1px solid #d5dbe8;border-radius:20px;padding:10px 16px;font-size:13.5px;font-family:inherit}
.ai-input input:focus{outline:none;border-color:var(--blue)}
.ai-input button{border:none;background:var(--blue);color:#fff;border-radius:20px;width:74px;font-size:13.5px;cursor:pointer}
/* 对话内留资卡 */
.lead-card{background:#fff;border:2px solid var(--orange);border-radius:14px;padding:14px;width:92%;align-self:flex-start}
.lead-card h4{font-size:14px;color:#c25a10;margin-bottom:4px}
.lead-card p{font-size:11.5px;color:var(--muted);margin-bottom:10px}
.lead-card input{width:100%;border:1px solid #d5dbe8;border-radius:8px;padding:8px 10px;font-size:12.5px;margin-bottom:7px;font-family:inherit}
.lead-card .row2{display:flex;gap:7px}
.lead-card .row2 input{flex:1}
.lead-card .sub{width:100%;background:var(--orange);border:none;color:#fff;border-radius:8px;padding:9px;font-size:13px;font-weight:700;cursor:pointer}
.lead-card .done{color:#177a4b;font-size:13px;text-align:center;padding:8px 0}

/* 获客弹层 */
.capture-modal{position:fixed;inset:0;z-index:300;background:rgba(8,14,34,.55);display:none;align-items:center;justify-content:center;padding:20px}
.capture-modal.open{display:flex}
.capture-box{background:#fff;border-radius:20px;max-width:760px;width:100%;display:grid;grid-template-columns:1.1fr 1fr;overflow:hidden;animation:pop .3s}
@keyframes pop{from{transform:scale(.94);opacity:0}to{transform:scale(1);opacity:1}}
@media(max-width:760px){.capture-box{grid-template-columns:1fr;max-height:90vh;overflow-y:auto}}
.capture-left{background:var(--grad);color:#fff;padding:34px 30px}
.capture-left .kicker{color:var(--cyan);font-size:12px;letter-spacing:2px;font-weight:700}
.capture-left h3{font-size:23px;margin:10px 0 8px}
.capture-left p{font-size:13px;opacity:.88}
.capture-left ul{margin-top:16px}
.capture-left li{font-size:13px;padding:4px 0;opacity:.92}
.capture-right{padding:30px 28px}
.step-tag{display:inline-block;background:#eef2fd;color:var(--blue);font-size:11.5px;font-weight:700;padding:3px 10px;border-radius:12px;margin-bottom:14px}
.opt-grid{display:grid;grid-template-columns:1fr 1fr;gap:9px;margin:10px 0 16px}
.opt{border:1.5px solid var(--line);border-radius:10px;padding:10px 8px;text-align:center;font-size:12.5px;cursor:pointer;transition:.15s}
.opt:hover{border-color:var(--blue)}
.opt.sel{border-color:var(--blue);background:#eef2fd;color:var(--blue);font-weight:700}
.x-btn{position:absolute;top:14px;right:16px;background:none;border:none;font-size:22px;color:#fff;cursor:pointer;opacity:.75;z-index:2}

/* 管理后台 */
.admin-wrap{max-width:1180px;margin:26px auto;padding:0 22px}
.stat-row{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:24px}
.stat-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px;box-shadow:var(--shadow)}
.stat-card b{font-size:28px;display:block}
.stat-card.a b{color:#d94f4f}.stat-card.b b{color:#d9913b}.stat-card.c b{color:#2a9d8f}
.stat-card span{font-size:12.5px;color:var(--muted)}
.lead-table{width:100%;border-collapse:collapse;background:#fff;font-size:12.8px;border-radius:14px;overflow:hidden;box-shadow:var(--shadow)}
.lead-table th{background:#101c40;color:#fff;padding:10px 12px;text-align:left;white-space:nowrap}
.lead-table td{padding:10px 12px;border-top:1px solid var(--line);vertical-align:top}
.grade{display:inline-block;width:26px;height:26px;border-radius:50%;color:#fff;font-weight:800;text-align:center;line-height:26px;font-size:13px}
.grade.A{background:#d94f4f}.grade.B{background:#d9913b}.grade.C{background:#2a9d8f}
.pill{display:inline-block;padding:2px 10px;border-radius:12px;font-size:11.5px;font-weight:600}
.pill.new{background:#e8f0ff;color:#1f4fd8}.pill.contacted{background:#fff4e5;color:#b26a12}.pill.won{background:#e5f7ee;color:#177a4b}
.status-sel{border:1px solid #d5dbe8;border-radius:8px;padding:5px 8px;font-size:12px;font-family:inherit}
.token-bar{background:#fff8ec;border:1px solid #f0ddba;border-radius:10px;padding:10px 14px;font-size:13px;margin-bottom:18px;display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.token-bar input{border:1px solid #e3d5b3;border-radius:8px;padding:7px 10px;font-family:inherit}
.badge-ai{display:inline-block;background:linear-gradient(135deg,#1f4fd8,#22d3ee);color:#fff;font-size:10.5px;padding:2px 8px;border-radius:8px;font-weight:700;margin-left:6px;vertical-align:1px}

/* 动效 */
.reveal{opacity:0;transform:translateY(22px);transition:.7s cubic-bezier(.2,.7,.3,1)}
.reveal.in{opacity:1;transform:none}

/* 联系页 */
.contact-hero{background:var(--grad);color:#fff;padding:70px 0 60px}
.contact-hero h1{font-size:34px}
.contact-hero p{opacity:.85;margin-top:10px}
.info-list li{display:flex;gap:12px;padding:12px 0;border-bottom:1px dashed var(--line);font-size:14px}
.info-list .ic{width:38px;height:38px;border-radius:10px;background:#eef2fd;display:flex;align-items:center;justify-content:center;font-size:17px;flex-shrink:0}

/* ---------------- 双语 (i18n) ---------------- */
.head-actions{display:flex;align-items:center;gap:12px;margin-left:auto}
.lang-switch{display:inline-flex;align-items:center;gap:5px;padding:7px 14px;border:1px solid rgba(255,255,255,.35);border-radius:20px;color:#fff;font-size:13px;font-weight:600;transition:.2s;white-space:nowrap}
.lang-switch:hover{background:rgba(255,255,255,.14)}
/* 英文版隐藏中文版式里的英文装饰小字 / 重复标签 */
html[lang="en"] .en-deco{display:none!important}
html[lang="en"] .sub-en{display:none!important}