/* 铝班官网 · 公共样式 site.css
 * 来源：index.html 内联 <style>（2026-10-16 P1 外提）
 * 注意：本文件位于 /assets/，站内图片相对路径需写 ../images/
 */
/* ═══ 品牌设计令牌（严格取自 VI 手册 v1.0） ═══ */
:root{
  --lv-red:#C8102E; --lv-red-600:#A00D24; --lv-red-50:#FCE8EA;
  --lv-ink:#1F2937; --lv-ink-700:#374151; --lv-ink-500:#6B7280; --lv-ink-400:#9CA3AF; --lv-ink-200:#E5E7EB; --lv-ink-100:#F3F4F6;
  --lv-warm:#F9F7F2; --lv-warm-dark:#EDE9DF;
  --lv-metal:#A8A29E; --lv-metal-light:#D6D1CB;
  --font-serif:"Noto Serif SC","Source Han Serif SC",serif;
  --font-sans:"Source Han Sans CN","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-display:"Bebas Neue","Arial Black",sans-serif;
  --r-card:16px; --r-sm:8px;
  --ease:cubic-bezier(.16,1,.3,1);
  --nav-h:88px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased;scroll-padding-top:var(--nav-h)}
/* 注意：scroll-padding（容器）与 scroll-margin（目标）会叠加，只保留容器一份，勿再给 section[id] 加 scroll-margin-top */
html,body{overflow-x:clip}
body{font-family:var(--font-sans);color:var(--lv-ink);background:#fff;line-height:1.7}
img{display:block;max-width:100%}
a{text-decoration:none;color:inherit}
.wrap{max-width:1400px;margin:0 auto;padding:0 clamp(20px,5vw,80px)}

/* ═══ 可达性基础 ═══ */
.skip-link{position:fixed;top:-60px;left:16px;z-index:200;background:var(--lv-red);color:#fff;padding:10px 20px;border-radius:var(--r-sm);font-size:14px;transition:top .2s}
.skip-link:focus{top:12px}
:focus-visible{outline:2px solid var(--lv-red);outline-offset:2px}

/* ═══ 通用版块标签 ═══ */
.sec{padding:clamp(48px,6vw,80px) 0}
.sec-label{display:inline-flex;align-items:center;gap:12px;font-family:var(--font-display);font-size:14px;letter-spacing:.35em;color:var(--lv-red);text-transform:uppercase;margin-bottom:14px}
.sec-label::before{content:"";width:36px;height:2px;background:var(--lv-red)}
.sec-title{font-family:var(--font-serif);font-size:clamp(26px,4vw,44px);font-weight:700;line-height:1.3;letter-spacing:.02em}
.sec-tag{margin-top:10px;font-family:var(--font-serif);font-size:15px;letter-spacing:.3em;color:var(--lv-red)}
.sec-desc{margin-top:12px;font-size:16px;color:var(--lv-ink-500);max-width:560px}

/* ═══ 01 导航 ═══ */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;transition:background .3s var(--ease),box-shadow .3s var(--ease)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:88px;gap:24px}
.nav-logo{position:relative;display:block;height:36px;flex-shrink:0}
.nav-logo img{height:36px;width:auto;transition:opacity .3s}
.nav-logo .logo-light{position:absolute;left:0;top:0;opacity:1}
.nav-logo .logo-color{opacity:0}
.nav.scrolled,.nav.solid{background:rgba(255,255,255,.96);backdrop-filter:blur(8px);box-shadow:0 2px 20px rgba(31,41,55,.08)}
.nav.scrolled .nav-logo .logo-light,.nav.solid .nav-logo .logo-light{opacity:0}
.nav.scrolled .nav-logo .logo-color,.nav.solid .nav-logo .logo-color{opacity:1}
.nav-menu{display:flex;gap:clamp(18px,2.6vw,44px);list-style:none;flex-shrink:0;white-space:nowrap}
.nav-menu a{position:relative;display:flex;align-items:center;min-height:44px;font-size:15px;font-weight:500;color:rgba(255,255,255,.88);letter-spacing:.06em;padding:6px 0;transition:color .25s}
.nav.scrolled .nav-menu a,.nav.solid .nav-menu a{color:var(--lv-ink-700)}
.nav-menu a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--lv-red);transition:width .3s var(--ease)}
.nav-menu a:hover{color:#fff}
.nav.scrolled .nav-menu a:hover,.nav.solid .nav-menu a:hover{color:var(--lv-red)}
.nav-menu a:hover::after{width:100%}
.nav-right{display:flex;align-items:center;gap:24px;flex-shrink:0}
.nav-tel{font-family:var(--font-display);font-size:18px;letter-spacing:.08em;color:#fff}
.nav.scrolled .nav-tel,.nav.solid .nav-tel{color:var(--lv-ink)}
.nav-cta{display:inline-block;padding:10px 26px;background:var(--lv-red);color:#fff;font-size:14px;font-weight:500;letter-spacing:.1em;border-radius:var(--r-sm);transition:background .25s,transform .25s var(--ease)}
.nav-cta:hover{background:var(--lv-red-600);transform:translateY(-2px)}
/* 汉堡按钮（≤1024px 显示） */
.nav-burger{display:none;flex-direction:column;justify-content:center;gap:6px;width:44px;height:44px;background:none;border:none;cursor:pointer;padding:8px}
.nav-burger span{display:block;height:2px;background:#fff;transition:transform .3s var(--ease),opacity .2s}
.nav.scrolled .nav-burger span,.nav.solid .nav-burger span{background:var(--lv-ink)}
.nav-burger[aria-expanded="true"] span:nth-child(1){transform:translateY(8px) rotate(45deg)}
.nav-burger[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-8px) rotate(-45deg)}
.nav-drawer{position:fixed;top:0;right:0;bottom:0;width:min(320px,84vw);background:var(--lv-ink);z-index:110;transform:translateX(100%);transition:transform .35s var(--ease);padding:110px 36px 40px;visibility:hidden}
.nav-drawer.open{transform:translateX(0);visibility:visible}
.nav-drawer a{display:block;font-family:var(--font-serif);font-size:22px;color:#fff;padding:16px 0;border-bottom:1px solid rgba(255,255,255,.1);letter-spacing:.1em}
.nav-drawer a:hover{color:#E84B5A}
.nav-mask{position:fixed;inset:0;background:rgba(17,24,39,.5);z-index:105;opacity:0;pointer-events:none;transition:opacity .3s}
.nav-mask.show{opacity:1;pointer-events:auto}

/* ═══ 02 首屏 Banner ═══ */
.hero{position:relative;min-height:min(100svh,860px);display:flex;flex-direction:column;overflow:hidden;background:var(--lv-ink)}
.hero-bg{position:absolute;inset:0;background:url("../images/hero.webp") center 38%/cover no-repeat}
.hero-veil{position:absolute;inset:0;background:linear-gradient(100deg,rgba(17,24,39,.82) 0%,rgba(17,24,39,.55) 42%,rgba(17,24,39,.12) 75%,rgba(17,24,39,.30) 100%)}
.hero-content{position:relative;z-index:2;flex:1;width:100%;min-width:0;box-sizing:border-box;display:flex;flex-direction:column;justify-content:flex-end;padding-top:120px;padding-bottom:clamp(28px,4.5vh,56px)}
.hero-en{font-family:var(--font-display);font-size:16px;letter-spacing:.5em;color:rgba(255,255,255,.78);text-transform:uppercase;margin-bottom:26px;white-space:normal;overflow-wrap:break-word;word-break:normal;max-width:100%}
.hero-title{font-family:var(--font-serif);font-size:clamp(30px,6vw,76px);font-weight:900;color:#fff;line-height:1.24;letter-spacing:.06em;max-width:100%;overflow-wrap:break-word;word-break:normal}
.hero-title em{font-style:normal;color:var(--lv-red);text-shadow:0 2px 28px rgba(200,16,46,.5),0 1px 3px rgba(17,24,39,.55)}
.hero-kw{display:block;margin-top:14px;font-size:clamp(14px,1.9vw,24px);font-weight:500;letter-spacing:.3em;color:rgba(255,255,255,.72);max-width:100%;overflow-wrap:break-word}
.hero-sub{margin-top:18px;font-size:clamp(15px,1.6vw,18px);font-weight:300;color:rgba(255,255,255,.82);letter-spacing:.14em}
.hero-line{width:64px;height:3px;background:var(--lv-red);margin:clamp(22px,3vh,36px) 0}
.hero-btns{display:flex;gap:20px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:10px;padding:16px 40px;font-size:15px;font-weight:500;letter-spacing:.12em;border-radius:var(--r-sm);transition:all .3s var(--ease)}
.btn-red{background:var(--lv-red);color:#fff}
.btn-red:hover{background:var(--lv-red-600);transform:translateY(-3px);box-shadow:0 12px 28px rgba(200,16,46,.35)}
.btn-ghost{border:1px solid rgba(255,255,255,.45);color:#fff}
.btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.08);transform:translateY(-3px)}
.hero-stats{position:relative;z-index:2;border-top:1px solid rgba(255,255,255,.14);background:rgba(17,24,39,.35);backdrop-filter:blur(6px)}
.hero-stats .wrap{display:grid;grid-template-columns:repeat(4,1fr)}
.stat{padding:30px 0 34px;text-align:left}
.stat+.stat{border-left:1px solid rgba(255,255,255,.12);padding-left:clamp(16px,3vw,48px)}
.stat span{overflow-wrap:break-word}
.stat b{display:block;font-family:var(--font-display);font-size:clamp(28px,3vw,40px);font-weight:400;color:#fff;letter-spacing:.04em;line-height:1}
.stat b i{font-style:normal;color:var(--lv-red);font-size:.6em;margin-left:2px}
.stat span{display:block;margin-top:10px;font-size:13px;color:rgba(255,255,255,.75);letter-spacing:.18em}

/* ═══ 03 品牌简介 ═══ */
.about{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(40px,6vw,100px);align-items:center}
.about-quote{margin:26px 0 0;padding-left:22px;border-left:3px solid var(--lv-red);font-family:var(--font-serif);font-size:clamp(17px,1.8vw,20px);line-height:2;color:var(--lv-ink-700)}
.about-text{margin-top:22px;font-size:15.5px;color:var(--lv-ink-500)}
.about-tags{display:flex;gap:14px;margin-top:28px;flex-wrap:wrap}
.about-tags span{padding:9px 20px;border:1px solid var(--lv-ink-200);border-radius:var(--r-sm);font-size:13px;letter-spacing:.1em;color:var(--lv-ink-700);transition:all .25s var(--ease)}
.about-tags span:hover{border-color:var(--lv-red);color:var(--lv-red);transform:translateY(-2px)}
.rule-icons{display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(10px,1.6vw,22px);margin:30px 0 0;padding:20px 0 0;border-top:1px solid var(--lv-ink-200);list-style:none}
.rule-icons .ri{display:flex;flex-direction:column;align-items:flex-start;gap:7px;color:var(--lv-red);padding-left:14px;border-left:1px solid var(--lv-ink-200);transition:border-color .25s var(--ease)}
.rule-icons .ri:hover{border-left-color:var(--lv-red)}
.rule-icons .ri svg{opacity:.9}
.rule-icons .ri b{font-family:var(--font-serif);font-size:15px;letter-spacing:.12em;color:var(--lv-ink);font-weight:700;margin-top:3px}
.rule-icons .ri span{font-size:12.5px;line-height:1.62;color:var(--lv-ink-500);letter-spacing:.02em}
.about-visual{position:relative}
.about-visual .frame{border-radius:var(--r-card);overflow:hidden;box-shadow:0 24px 60px rgba(31,41,55,.14);background:var(--lv-warm);padding:clamp(28px,3.2vw,48px)}
.about-visual .frame img{width:100%;aspect-ratio:3552/4421;object-fit:contain;object-position:center;background:transparent}
.about-visual::before{content:"";position:absolute;top:-24px;right:-24px;width:140px;height:140px;border-top:2px solid var(--lv-red);border-right:2px solid var(--lv-red);border-radius:0 var(--r-card) 0 0}
.about-badge{position:absolute;left:-44px;bottom:44px;background:var(--lv-ink);color:#fff;padding:22px 28px;border-radius:var(--r-card);box-shadow:0 20px 44px rgba(31,41,55,.28)}
.about-badge b{display:block;font-family:var(--font-serif);font-size:21px;letter-spacing:.1em}
.about-badge span{font-size:11px;color:var(--lv-metal);letter-spacing:.18em}

/* ═══ 04 产品分类 ═══ */
.products{background:var(--lv-warm)}
.prod-head{display:flex;justify-content:space-between;align-items:flex-end;gap:32px;margin-bottom:clamp(26px,3.6vw,46px);flex-wrap:wrap}
.prod-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.prod-card{position:relative;background:#fff;border-radius:var(--r-card);overflow:hidden;transition:transform .35s var(--ease),box-shadow .35s var(--ease);display:flex;flex-direction:column}
.prod-card:hover{transform:translateY(-8px);box-shadow:0 28px 56px rgba(31,41,55,.14)}
.prod-img{position:relative;aspect-ratio:3/2;overflow:hidden}
.prod-img img{width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease)}
.prod-card:hover .prod-img img{transform:scale(1.05)}
.prod-num{position:absolute;top:20px;left:24px;font-family:var(--font-display);font-size:15px;letter-spacing:.2em;color:#fff;background:rgba(31,41,55,.55);backdrop-filter:blur(4px);padding:6px 14px;border-radius:4px}
.prod-body{padding:28px 30px 32px;position:relative;flex:1;display:flex;flex-direction:column}
.prod-body::before{content:"";position:absolute;top:0;left:32px;width:0;height:3px;background:var(--lv-red);transition:width .4s var(--ease)}
.prod-card:hover .prod-body::before{width:56px}
.prod-body h3{font-family:var(--font-serif);font-size:clamp(20px,2vw,24px);font-weight:700;padding-top:14px}
.prod-body .en{font-family:var(--font-display);font-size:12px;letter-spacing:.28em;color:var(--lv-ink-500);margin-top:6px;text-transform:uppercase}
.prod-body p{margin-top:14px;font-size:14px;color:var(--lv-ink-500)}
.prod-link{display:inline-flex;align-items:center;gap:8px;margin-top:auto;padding-top:18px;font-size:13.5px;font-weight:500;letter-spacing:.12em;color:var(--lv-ink)}
.prod-link svg{transition:transform .3s var(--ease)}
.prod-card:hover .prod-link{color:var(--lv-red)}
.prod-card:hover .prod-link svg{transform:translateX(6px)}
/* 整卡热区：显式 overlay 链接（prod-body/case-meta 均有定位层，::after 拉伸法不可用） */
.card-stretch{position:absolute;inset:0;z-index:4}

/* ═══ 05 工程案例 ═══ */
.case-grid{display:grid;grid-template-columns:1.35fr 1fr;grid-auto-rows:clamp(220px,24vw,320px);gap:24px;margin-top:clamp(26px,3.6vw,46px)}
.case-item{position:relative;border-radius:var(--r-card);overflow:hidden}
.case-item.big{grid-row:span 2}
.case-item img{width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease)}
.case-item:hover img{transform:scale(1.04)}
.case-item::after{content:"";position:absolute;inset:0;background:linear-gradient(to top,rgba(17,24,39,.72) 0%,rgba(17,24,39,.06) 55%)}
.case-meta{position:absolute;left:clamp(20px,2.5vw,32px);bottom:clamp(18px,2.2vw,28px);z-index:2;color:#fff}

.case-meta .tag{display:inline-block;font-size:11px;letter-spacing:.16em;padding:5px 14px;background:var(--lv-red);border-radius:4px;margin-bottom:12px}
.case-meta h4{font-family:var(--font-serif);font-size:clamp(18px,2vw,22px);font-weight:700}
.case-meta p{font-size:13px;color:rgba(255,255,255,.78);margin-top:6px;letter-spacing:.06em}

/* ═══ 06 核心优势 ═══ */
.adv{background:var(--lv-ink);color:#fff;position:relative;overflow:hidden}
.adv::before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,rgba(200,16,46,.6),transparent)}
.adv .sec-label{color:#E84B5A}
.adv .sec-title{color:#fff}
.adv .sec-tag{color:#E84B5A}
.adv .sec-desc{color:var(--lv-ink-400)}
.adv-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin-top:clamp(28px,4vw,50px);border:1px solid rgba(255,255,255,.1);border-radius:var(--r-card);overflow:hidden}
.adv-item{padding:clamp(32px,3.5vw,48px) clamp(24px,3vw,40px) clamp(36px,4vw,52px);border-left:1px solid rgba(255,255,255,.1);transition:background .35s var(--ease),transform .35s var(--ease)}
.adv-item:first-child{border-left:none}
.adv-item:hover{background:rgba(255,255,255,.05);transform:translateY(-6px)}
.adv-item .num{font-family:var(--font-display);font-size:15px;letter-spacing:.3em;color:#E84B5A}
.adv-item .icon{margin:20px 0 16px;width:52px;height:52px;display:flex;align-items:center;justify-content:center;border:1px solid rgba(232,75,90,.45);border-radius:12px;color:#E84B5A;transition:all .3s var(--ease)}
.adv-item:hover .icon{background:var(--lv-red);color:#fff;border-color:var(--lv-red)}
.adv-item h4{font-family:var(--font-serif);font-size:clamp(18px,1.8vw,21px);font-weight:700}
.adv-item p{margin-top:14px;font-size:13.5px;line-height:1.9;color:var(--lv-ink-400)}

/* ═══ 06.5 资质与实力（占位，素材待甲方提供） ═══ */
/* 06 资质与实力 · 卡片样式对齐 .prod-card 基准（无描边/同内距/同字号/同hover） */
#quals{background:var(--lv-warm)}
.quals-cards{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin-top:clamp(26px,3.6vw,46px)}
.qc-card{background:#fff;border-radius:var(--r-card);padding:28px 30px 32px;position:relative;transition:transform .35s var(--ease),box-shadow .35s var(--ease)}
.qc-card::before{content:"";position:absolute;top:0;left:32px;width:0;height:3px;background:var(--lv-red);transition:width .4s var(--ease)}
.qc-card:hover{transform:translateY(-8px);box-shadow:0 28px 56px rgba(31,41,55,.14)}
.qc-card:hover::before{width:56px}
.qc-ic{width:48px;height:48px;display:flex;align-items:center;justify-content:center;background:var(--lv-red-50);color:var(--lv-red);border-radius:12px;font-size:20px}
.qc-card h3{font-family:var(--font-serif);font-size:clamp(20px,2vw,24px);font-weight:700;margin:18px 0 0}
.qc-card p{margin-top:14px;font-size:14px;line-height:1.9;color:var(--lv-ink-500)}
.qc-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.qc-tags span{font-size:12px;color:var(--lv-ink-700);background:var(--lv-ink-100);border-radius:99px;padding:6px 14px;letter-spacing:.04em}

/* ═══ 07 客户合作 / 工程招商 ═══ */
.coop{display:grid;grid-template-columns:58% 42%;gap:60px;align-items:center}
#coop .sec-title{font-size:clamp(28px,3.6vw,36px);line-height:1.3;margin-top:16px}
#coop .sec-tag{font-size:16px}
#coop .sec-desc{font-size:15px;line-height:1.8;max-width:520px}
.coop-list{margin-top:24px;display:grid;grid-template-columns:1fr 1fr;gap:20px 40px}
.coop-list li{list-style:none;display:flex;gap:8px;align-items:flex-start;font-size:14px;color:var(--lv-ink-500);line-height:1.7}
.coop-list li svg{flex-shrink:0;margin-top:4px;color:var(--lv-red)}
.coop-list li b{display:block;font-size:16px;font-weight:700;color:var(--lv-ink);margin-bottom:6px}
.coop-form{position:relative;background:#fff;border-radius:var(--r-sm);padding:40px 40px 48px;box-shadow:0 12px 32px rgba(31,41,55,.08)}
.coop-form h3{font-family:var(--font-serif);font-size:22px;font-weight:700;color:var(--lv-ink);margin:0}
.coop-form>p{margin-top:8px;font-size:13px;color:var(--lv-ink-400)}
.coop-form .row{margin-top:20px}
.coop-form>p+.row{margin-top:24px}
.coop-form label{display:block;font-size:14px;font-weight:400;color:var(--lv-ink-700);margin-bottom:10px;letter-spacing:0}
.coop-form input[type=text],.coop-form input[type=tel],.coop-form select{width:100%;height:44px;padding:0 16px;border:1px solid var(--lv-ink-200);border-radius:6px;background:#fff;font-family:var(--font-sans);font-size:14px;color:var(--lv-ink);transition:border-color .25s}
.coop-form input:focus,.coop-form select:focus{outline:none;border-color:var(--lv-red)}
.coop-form input.invalid{border-color:var(--lv-red)}
.coop-form .err{margin-top:4px;font-size:12px;color:var(--lv-red)}
.coop-form .err:empty{display:none}
.coop-form .hp{position:absolute;left:-9999px;width:1px;height:1px;opacity:0}
.coop-form .agree{display:flex;align-items:center;gap:8px;margin-top:16px;font-size:13px;color:var(--lv-ink-500);cursor:pointer}
.coop-form .agree input{width:16px;height:16px;accent-color:var(--lv-red);flex-shrink:0}
.coop-form .agree a,.coop-form .tip a{color:var(--lv-red);text-decoration:underline;text-underline-offset:3px}
.coop-form button{width:100%;margin-top:24px;height:48px;border:none;cursor:pointer;background:var(--lv-red);color:#fff;font-family:var(--font-sans);font-size:15px;font-weight:500;letter-spacing:.1em;border-radius:6px;transition:background .25s}
.coop-form button:hover{background:var(--lv-red-600)}
.coop-form button:disabled{opacity:.6;cursor:not-allowed}
.coop-form .tip{margin-top:16px;text-align:center;font-size:12px;color:var(--lv-ink-400)}
.toast{position:fixed;left:50%;bottom:48px;transform:translateX(-50%) translateY(20px);background:var(--lv-ink);color:#fff;padding:14px 28px;border-radius:12px;font-family:var(--font-sans);font-size:14px;letter-spacing:.05em;opacity:0;pointer-events:none;transition:opacity .3s,transform .3s var(--ease);z-index:99;box-shadow:0 16px 40px rgba(31,41,55,.3);max-width:88vw;text-align:center}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* ═══ 08 联系我们 + 页脚 ═══ */
.contact{background:var(--lv-warm);padding:clamp(48px,6vw,80px) 0}
.contact-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:28px;margin-top:clamp(24px,3vw,42px)}
.contact-card{background:#fff;border:1px solid var(--lv-warm-dark);border-radius:var(--r-card);padding:36px 32px;transition:transform .3s var(--ease),box-shadow .3s var(--ease)}
.contact-card:hover{transform:translateY(-6px);box-shadow:0 20px 44px rgba(31,41,55,.1)}
.contact-card .ic{width:44px;height:44px;border-radius:10px;background:var(--lv-red-50);color:var(--lv-red);display:flex;align-items:center;justify-content:center;margin-bottom:20px}
.contact-card h5{font-size:15px;font-weight:700;letter-spacing:.08em}
.contact-card p{margin-top:10px;font-size:14px;color:var(--lv-ink-500);line-height:1.9}
.footer{background:var(--lv-ink);color:var(--lv-ink-400);padding:72px 0 0}
.footer-top{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:clamp(32px,4vw,60px);padding-bottom:56px;border-bottom:1px solid rgba(255,255,255,.08)}
.footer-brand img{height:34px;width:auto;margin-bottom:22px}
.footer-brand p{font-size:13.5px;line-height:2;max-width:320px}
.footer h6{font-size:14px;font-weight:700;color:#fff;letter-spacing:.14em;margin-bottom:22px}
.footer ul{list-style:none}
.footer ul li{margin-bottom:12px}
.footer ul a{font-size:13.5px;transition:color .25s}
.footer ul a:hover{color:var(--lv-red)}
.footer .f-contact li{font-size:13.5px;margin-bottom:14px;display:flex;gap:10px}
.footer .f-contact li svg{flex-shrink:0;margin-top:4px;color:var(--lv-red)}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;padding:26px 0;font-size:12.5px;color:var(--lv-ink-400)}
.footer-bottom .beian a{color:var(--lv-ink-400);transition:color .25s}
.footer-bottom .beian a:hover{color:#fff}
.footer-bottom .beian span{margin:0 10px;color:rgba(255,255,255,.15)}

/* ═══ 响应式断点 ═══ */
@media (max-width:1280px){
  .adv-grid{grid-template-columns:repeat(2,1fr)}
  .adv-item:nth-child(3){border-left:none}
  .adv-item:nth-child(n+3){border-top:1px solid rgba(255,255,255,.1)}
  .contact-grid{grid-template-columns:repeat(2,1fr)}
  .quals-cards{grid-template-columns:1fr}
  .footer-top{grid-template-columns:1fr 1fr}
}
/* 中文导航 8 项在 ≤1180px 挤爆（实测 1120 起溢出），提前切汉堡菜单 */
@media (max-width:1180px){
  .nav-menu,.nav-tel{display:none}
  .nav-burger{display:flex}
}
/* 英文导航较短（实测 1025px 仍放得下），1025-1180 区间保留完整菜单 */
@media (min-width:1025px) and (max-width:1180px){
  :lang(en) .nav-menu{display:flex}
  :lang(en) .nav-burger{display:none}
}
@media (max-width:1024px){
  .about,.coop{grid-template-columns:1fr}
  .about-visual{max-width:640px}
  .about-badge{left:-16px}
  .prod-grid{grid-template-columns:repeat(2,1fr)}
  .case-grid{grid-template-columns:1fr;grid-auto-rows:clamp(240px,44vw,360px)}
  .case-item.big{grid-row:span 1}
}
@media (max-width:768px){
  .rule-icons{grid-template-columns:repeat(2,1fr);gap:20px 16px}
  .hero-stats .wrap{grid-template-columns:repeat(2,1fr)}
  .stat{padding:20px 0 22px}
  .stat:nth-child(3){border-left:none}
  .stat:nth-child(n+3){border-top:1px solid rgba(255,255,255,.12)}
  .prod-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .footer-top{grid-template-columns:1fr}
  .coop-list{grid-template-columns:1fr}
}
@media (max-width:480px){
  .quals-cards{grid-template-columns:1fr}
  .hero-btns .btn{width:100%;justify-content:center}
  .nav-cta{padding:8px 18px;font-size:13px}
  .adv-grid{grid-template-columns:1fr}
  .adv-item{border-left:none;border-top:1px solid rgba(255,255,255,.1)}
  .adv-item:first-child{border-top:none}
}

/* ═══ 减少动态偏好 ═══ */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition:none!important;animation:none!important}
}


/* ==== P1 SUBPAGE COMPONENTS ====
 * 2026-10-16 追加：子页面（产品页/案例页/招商页/关于页）通用组件
 * 复用首页设计令牌，未引入任何新依赖
 */

/* 面包屑 */
.breadcrumb{font-size:13px;color:var(--lv-ink-500);padding:18px 0 0;margin-top:88px}
.breadcrumb a{color:inherit;text-decoration:none;transition:color .2s}
.breadcrumb a:hover{color:var(--lv-red)}
.breadcrumb .sep{margin:0 8px;opacity:.45}
.breadcrumb [aria-current="page"]{color:var(--lv-red)}
/* 内页 hero 内嵌面包屑：反白样式，不再占独立一行 */
.breadcrumb.sub-crumb{margin:0 0 18px;padding:0;font-size:13px;color:rgba(255,255,255,.7);letter-spacing:.04em}
.breadcrumb.sub-crumb a{color:rgba(255,255,255,.82)}
.breadcrumb.sub-crumb a:hover{color:#fff}
.breadcrumb.sub-crumb .sep{margin:0 7px;opacity:.4}
.breadcrumb.sub-crumb [aria-current="page"]{color:#E84B5A}

/* 子页首屏（比首页 hero 矮，留出内容空间） */
.sub-hero{position:relative;min-height:clamp(420px,56vh,620px);display:flex;
  align-items:flex-end;overflow:hidden;background:var(--lv-ink);color:#fff;padding-top:88px}
.sub-hero-bg{position:absolute;inset:0;background-size:cover;background-position:center 42%}
.sub-hero-bg::after{content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(15,20,28,.72) 0%,rgba(23,31,42,.34) 20%,rgba(31,41,55,.70) 55%,rgba(31,41,55,.93) 100%)}
.sub-hero-inner{position:relative;z-index:2;padding-bottom:clamp(48px,7vw,88px);width:100%}
.sub-hero-title{font-family:var(--font-display);font-size:clamp(34px,5.4vw,64px);
  line-height:1.15;margin:0 0 14px;font-weight:700;letter-spacing:.02em}
.sub-hero-desc{font-size:clamp(15px,1.6vw,19px);color:rgba(255,255,255,.86);
  max-width:660px;margin:0 0 28px}
.sub-hero-cta{display:flex;flex-wrap:wrap;gap:14px;align-items:center}
.sub-hero-tel{color:#fff;font-size:15px;opacity:.9}
.sub-hero-tel b{font-family:var(--font-display);font-size:20px;letter-spacing:.03em}

/* 痛点 / 场景（3 列） */
.pain-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));
  gap:clamp(18px,2.4vw,30px);margin-top:32px}
.pain-card{background:var(--lv-warm);border-radius:var(--r-sm);padding:clamp(24px,2.6vw,34px)}
.pain-card h3{font-family:var(--font-display);font-size:19px;margin:0 0 10px;color:var(--lv-ink)}
.pain-card p{margin:0;font-size:15px;color:var(--lv-ink-700);line-height:1.75}
.pain-num{display:inline-block;font-family:var(--font-display);font-size:13px;
  color:var(--lv-red);letter-spacing:.2em;margin-bottom:12px}

/* 参数表 */
.spec-wrap{margin-top:30px;overflow-x:auto;-webkit-overflow-scrolling:touch}
.spec-table{width:100%;border-collapse:collapse;font-size:15px;min-width:560px}
.spec-table th,.spec-table td{padding:14px 16px;text-align:left;
  border-bottom:1px solid var(--lv-ink-200);vertical-align:top}
.spec-table thead th{background:var(--lv-warm);color:var(--lv-ink);
  font-family:var(--font-display);font-size:14px;letter-spacing:.06em;white-space:nowrap}
.spec-table tbody th{font-weight:500;color:var(--lv-ink);white-space:nowrap;width:120px}
.spec-table td{color:var(--lv-ink-700)}
.spec-table tbody tr:hover{background:var(--lv-warm)}

/* 交付流程（6 步） */
.flow{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));
  gap:clamp(16px,2vw,26px);margin-top:30px;counter-reset:step}
.flow-step{position:relative;padding:26px 18px 22px;background:#fff;
  border:1px solid var(--lv-ink-200);border-radius:var(--r-sm)}
.flow-step::before{counter-increment:step;content:counter(step,decimal-leading-zero);
  display:block;font-family:var(--font-display);font-size:26px;color:var(--lv-red);
  line-height:1;margin-bottom:14px;opacity:.85}
.flow-step h4{font-family:var(--font-display);font-size:17px;margin:0 0 8px}
.flow-step p{margin:0;font-size:14px;color:var(--lv-ink-500);line-height:1.7}

/* FAQ */
.faq{margin-top:28px;border-top:1px solid var(--lv-ink-200)}
.faq details{border-bottom:1px solid var(--lv-ink-200)}
.faq summary{cursor:pointer;list-style:none;padding:20px 44px 20px 0;position:relative;
  font-family:var(--font-display);font-size:17px;color:var(--lv-ink)}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"";position:absolute;right:8px;top:50%;width:11px;height:11px;
  border-right:2px solid var(--lv-red);border-bottom:2px solid var(--lv-red);
  transform:translateY(-70%) rotate(45deg);transition:transform .25s}
.faq details[open] summary::after{transform:translateY(-30%) rotate(225deg)}
.faq details p{margin:0;padding:0 44px 22px 0;font-size:15px;color:var(--lv-ink-700);line-height:1.8}

/* 底部 CTA 条 */
/* 深色版 CTA · 50:50 块面对称（2026-10-17 重做） */
.cta-bar{background:var(--lv-ink);color:#fff;padding:clamp(44px,5.5vw,72px) 0}
.cta-grid{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;max-width:1200px;margin:0 auto}
.cta-copy .sec-label{margin-bottom:20px}
.cta-copy .sec-title{color:#fff;font-size:clamp(28px,3vw,38px);line-height:1.3}
.cta-copy .sec-tag{color:#E84B5A;font-size:15px;margin-top:16px}
.cta-copy h3{font-size:18px;font-weight:700;color:#fff;margin:32px 0 0}
.cta-copy p{color:rgba(255,255,255,.65);font-size:14px;line-height:1.8;margin:12px 0 0}
.cta-copy .coop-list{margin-top:32px;gap:30px 40px}
.cta-copy .coop-list li{line-height:1.9}
.cta-copy .coop-list li{color:rgba(255,255,255,.65)}
.cta-copy .coop-list li b{color:#fff}
.cta-tel{font-family:var(--font-sans);font-size:20px;font-weight:700;color:#fff;letter-spacing:.02em;margin:32px 0 0}
.cta-hours{font-size:13px;color:rgba(255,255,255,.55);margin:8px 0 0}
.cta-bar .coop-form{background:#f8f9fa;box-shadow:0 12px 32px rgba(0,0,0,.28)}
@media (max-width:768px){.cta-grid,.coop{grid-template-columns:1fr;gap:40px}}

/* ═══ 首页 · 一扇窗两端风景（出海叙事入口，2026-10-16 整合）═══ */
.duo{display:grid;grid-template-columns:1fr 1fr;position:relative}
.duo-half{position:relative;min-height:clamp(380px,52vh,560px);display:flex;align-items:flex-end;overflow:hidden}
.duo-half .bg{position:absolute;inset:0;background-size:cover;background-position:center}
.duo-half .bg::after{content:"";position:absolute;inset:0}
.duo-factory .bg{background-image:url("../images/cases/factory-preassembly-01.webp")}
.duo-factory .bg::after{background:linear-gradient(200deg,rgba(20,25,33,.25),rgba(20,25,33,.88))}
.duo-estate .bg{background-image:url("../images/cases/case-seaforth-rooftop.webp")}
.duo-estate .bg::after{background:linear-gradient(160deg,rgba(20,25,33,.15),rgba(20,25,33,.78))}
.duo-txt{position:relative;z-index:2;color:#fff;padding:clamp(28px,4vw,56px);min-height:300px;display:flex;flex-direction:column;justify-content:flex-start}
.duo-kicker{font-size:13px;letter-spacing:.3em;color:var(--lv-red-50);opacity:.9;margin-bottom:12px}
.duo-txt h3{font-family:var(--font-serif);font-size:clamp(22px,3vw,34px);margin:0 0 10px;line-height:1.25}
.duo-txt p{margin:0;font-size:15px;color:rgba(255,255,255,.86);max-width:34ch;line-height:1.8}
.duo-seam{position:absolute;left:50%;top:0;bottom:0;width:2px;background:linear-gradient(var(--lv-red),rgba(200,16,46,0));z-index:3;transform:translateX(-50%)}
/* 佛山侧文字右对齐，向中缝收拢，与悉尼侧形成对称 */
@media (min-width:821px){
  .duo-factory .duo-txt{margin-left:auto;text-align:right}
  .duo-factory .duo-txt p{margin-left:auto}
}
@media (max-width:820px){.duo{grid-template-columns:1fr}.duo-seam{display:none}}

/* ═══ 首页 · 案例区交付地带（chips + 查看全部）═══ */
.case-geo{display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap;margin-top:clamp(18px,2.4vw,32px)}
.case-geo .chips{display:flex;flex-wrap:wrap;gap:10px;align-items:center;flex:1;min-width:280px}
.case-geo .geo-badge{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;color:var(--lv-red);border:1px solid var(--lv-red);border-radius:99px;padding:6px 14px;letter-spacing:.04em}
.case-geo .geo-badge i{width:7px;height:7px;border-radius:50%;background:var(--lv-red);box-shadow:0 0 0 4px rgba(200,16,46,.15)}
.case-geo .chip{font-size:12.5px;color:var(--lv-ink-500);border:1px solid var(--lv-ink-200);border-radius:99px;padding:6px 14px;transition:.25s}
.case-geo .chip:hover{border-color:var(--lv-red);color:var(--lv-red)}
@media (max-width:820px){.case-geo{flex-direction:column;align-items:flex-start}}


/* ═══════════════════════════════════════════════════════════
   英文站 /en/ 专属样式（2026-10-17）
   原则：复用上面的设计令牌与既有 class，此处只补英文排版所需的最小增量。
   ═══════════════════════════════════════════════════════════ */
/* 英文正文：改用系统无衬线（不引入 Google Fonts，澳洲访问更快） */
:lang(en) body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif}
:lang(en) .sec-title{font-family:inherit;letter-spacing:-.01em}
:lang(en) .hero-title{font-family:inherit;font-weight:800;letter-spacing:-.02em}
:lang(en) .prod-body h3,:lang(en) .qc-card h3,:lang(en) .case-meta h4{font-family:inherit}
:lang(en) .about-quote{font-family:inherit}

/* 英文 hero：文案容器限宽 + 字号 clamp，杜绝移动端溢出 */
/* 英文站 hero 背景换成悉尼实拍（中文站 hero 图为国内场景） */
.en-hero .hero-bg{background:url("../images/en/hero-pavilion.webp") center 45%/cover no-repeat}
.en-hero .hero-veil{background:linear-gradient(100deg,rgba(15,20,28,.86) 0%,rgba(15,20,28,.62) 45%,rgba(15,20,28,.18) 78%,rgba(15,20,28,.34) 100%)}
.en-hero .hero-content{max-width:min(1400px,100%)}
.en-hero .hero-title{font-size:clamp(28px,5.2vw,64px);line-height:1.15;max-width:22ch}
.en-hero .hero-kw{letter-spacing:.14em;font-size:clamp(13px,1.5vw,17px);margin-top:12px}
.en-hero .hero-btns{flex-wrap:wrap}
@media (max-width:520px){.en-hero .hero-title{font-size:clamp(24px,7.4vw,34px);max-width:100%}}

/* 四宫格卖点（Why aluminium） */
.en-why{background:var(--lv-warm)}
.en-why-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:clamp(26px,3.6vw,46px)}
.en-why-card{background:#fff;border-radius:var(--r-card);padding:28px 28px 32px;position:relative;transition:transform .35s var(--ease),box-shadow .35s var(--ease)}
.en-why-card::before{content:"";position:absolute;top:0;left:30px;width:0;height:3px;background:var(--lv-red);transition:width .4s var(--ease)}
.en-why-card:hover{transform:translateY(-8px);box-shadow:0 28px 56px rgba(31,41,55,.14)}
.en-why-card:hover::before{width:56px}
.en-why-ic{width:48px;height:48px;display:flex;align-items:center;justify-content:center;background:var(--lv-red-50);color:var(--lv-red);border-radius:12px}
.en-why-card h3{font-size:clamp(17px,1.6vw,20px);font-weight:700;margin:18px 0 0;color:var(--lv-ink)}
.en-why-card p{margin-top:12px;font-size:14px;line-height:1.75;color:var(--lv-ink-500)}
@media (max-width:960px){.en-why-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:560px){.en-why-grid{grid-template-columns:1fr}}

/* 英文案例卡（复用 .case-card 体系，仅补字号） */
:lang(en) .case-card .body h3{font-size:17px}
:lang(en) .case-card .en{font-size:12px}

/* 时区/联系说明表 */
.en-hours{margin-top:18px;border:1px solid var(--lv-ink-200);border-radius:var(--r-sm);overflow:hidden;background:#fff}
.en-hours tr+tr{border-top:1px solid var(--lv-ink-100)}
.en-hours th,.en-hours td{padding:12px 16px;font-size:14px;text-align:left}
.en-hours th{background:var(--lv-warm);color:var(--lv-ink-700);font-weight:600;width:44%}
.en-hours td{color:var(--lv-ink-500);font-variant-numeric:tabular-nums}

/* 英文表单：复用 .coop-form，仅补 label 大小写与输入字号 */
:lang(en) .coop-form label{font-size:13px}
:lang(en) .coop-form input,:lang(en) .coop-form select,:lang(en) .coop-form textarea{font-size:14.5px}
:lang(en) .coop-form textarea,.en-form textarea{width:100%;min-height:104px;padding:12px 16px;border:1px solid var(--lv-ink-200);border-radius:6px;background:#fff;font-family:inherit;color:var(--lv-ink);resize:vertical;transition:border-color .25s}
:lang(en) .coop-form textarea:focus{outline:none;border-color:var(--lv-red)}

/* ═══ 语言切换（中 ⇄ EN）· 中英文站共用（2026-10-17）═══ */
.lang-switch{display:inline-flex;align-items:center;gap:6px;padding:7px 13px;border:1px solid rgba(255,255,255,.35);border-radius:var(--r-sm);color:rgba(255,255,255,.9);font-size:13px;font-weight:500;letter-spacing:.08em;line-height:1;text-decoration:none;transition:all .25s var(--ease);white-space:nowrap}
.lang-switch:hover{border-color:var(--lv-red);background:var(--lv-red);color:#fff}
.lang-switch svg{flex-shrink:0}
.nav.scrolled .lang-switch,.nav.solid .lang-switch{border-color:rgba(31,41,55,.25);color:var(--lv-ink-700)}
.nav.scrolled .lang-switch:hover,.nav.solid .lang-switch:hover{border-color:var(--lv-red);background:var(--lv-red);color:#fff}
@media (max-width:900px){.nav-right .lang-switch{display:none}}
/* 抽屉内的语言入口（抽屉本身仅小屏可用，故无需额外开关） */
.lang-drawer-link{display:flex;align-items:center;gap:8px;font-size:15px;letter-spacing:.04em;color:var(--lv-red-50);padding:16px 0;border-bottom:1px solid rgba(255,255,255,.1)}
.lang-drawer-link:hover{color:#fff}
.lang-drawer-link::before{content:/⇄/;font-size:14px;opacity:.7}

/* ═══ 移动端溢出治理（2026-10-17 · 375/390/414/768 实测驱动）═══
   根因：html,body{overflow-x:clip} 会掩盖溢出，故此前检测为假阴性。
   以下为元素级修复，覆盖中文站与英文站。 */
@media (max-width:768px){
  /* hero 文案容器：沿用 .wrap 的左右内距，不再单独覆盖（防与主体框架错位） */
  .hero-content{max-width:100%}
  .hero-title{font-size:clamp(26px,7.6vw,40px)}
  .hero-en{font-size:11px;letter-spacing:.22em;margin-bottom:18px}
  .hero-sub{font-size:14px;letter-spacing:.04em;margin-top:14px}
  .hero-kw{font-size:13px;letter-spacing:.14em}
  .hero-line{margin:18px 0}
  /* 按钮组：允许换行、整行铺开，杜绝出屏 */
  .hero-btns{flex-wrap:wrap;gap:12px}
  .hero-btns .btn{flex:1 1 auto;min-width:0;justify-content:center}
  /* 数据条 2×2，文字可换行 */
  .hero-stats .wrap{grid-template-columns:repeat(2,1fr)}
  .hero-stats .stat{padding:14px 8px}
  .stat b{font-size:clamp(20px,6vw,28px)}
  .stat span{font-size:11.5px;line-height:1.5;letter-spacing:.02em;display:block;margin-top:4px}
  .stat:nth-child(n+3){border-top:1px solid rgba(255,255,255,.12)}
  .stat+stat{padding-left:0;border-left:none}
  /* 导航右上按钮：小屏收敛，避免出屏 */
  .nav-cta{padding:9px 16px;font-size:13px;letter-spacing:.04em}
  .nav-tel{font-size:14px;letter-spacing:.02em}
}
@media (max-width:430px){
  .nav-tel{display:none}          /* 极窄屏优先保按钮与语言切换 */
  .nav-cta{padding:9px 14px;font-size:12.5px}
}
/* 中文首页 about-visual 装饰角溢出（实测 +4px @375/390/414） */
@media (max-width:768px){
  .about-visual::before{width:88px;height:88px;top:-12px;right:-12px}
  .about-visual{max-width:100%;overflow:hidden}
}
/* 英文站 hero 字号（原规则收紧，确保 390px 完整两行） */
@media (max-width:520px){
  .en-hero .hero-title{font-size:clamp(22px,6.4vw,30px);line-height:1.18;max-width:100%}
  .en-hero .hero-kw{font-size:12px;letter-spacing:.08em;line-height:1.6}
  .en-hero .hero-sub{font-size:13.5px}
  .en-hero .hero-en{font-size:10px;letter-spacing:.16em}
}

/* 页脚语言入口（中文站） */
.footer-lang{color:inherit;text-decoration:underline;text-underline-offset:3px;transition:color .25s}
.footer-lang:hover{color:#fff}