/* =========================================================
   中益环保 · 化工环保企业站 前端设计系统 v3（现代化升级）
   主色：环保绿系（teal / emerald / cyan）+ 深森林底 + 工业 slate
   设计目标：通透留白、渐变网格、辉光玻璃质感、卡片悬浮光效、
   按钮微光与节奏动画，呈现现代环保科技感。
   注意：保留全部原有类名/变量，不改动任何模板 PHP 与 app.js。
   ========================================================= */

/* ---------- 变量（含兼容 detail.php 内联样式所需变量） ---------- */
:root{
  --primary:#0f766e;          /* teal-700 主色 */
  --primary-600:#0d9488;      /* teal-600 */
  --primary-500:#14b8a6;      /* teal-500 */
  --primary-400:#2dd4bf;      /* teal-400 */
  --accent:#10b981;           /* emerald-500 强调 */
  --accent-2:#22d3ee;         /* cyan-400 辅助 */
  --accent-soft:#d1fae5;      /* emerald-100 */
  --dark:#0f172a;             /* slate-900 */
  --dark-2:#1e293b;           /* slate-800 */
  --ink:#0f172a;              /* 文本主色（兼容 var(--text)） */
  --text:var(--ink);
  --text-muted:#64748b;       /* slate-500（兼容 var(--text-muted)） */
  --gray-100:#f1f5f9;         /* slate-100（兼容 var(--gray-100)） */
  --bg:#ffffff;
  --bg-alt:#f5fbf9;           /* 极浅绿灰背景 */
  --bg-deep:#06231f;          /* 深森林底 */
  --bg-deep-2:#0a3530;
  --border:#e2e8f0;
  --border-strong:#cbd5e1;
  --radius:18px;
  --radius-sm:12px;
  --shadow:0 18px 40px -18px rgba(13,148,136,.28);
  --shadow-sm:0 8px 20px -10px rgba(13,148,136,.22);
  --shadow-lg:0 30px 60px -24px rgba(13,148,136,.32);
  --maxw:1200px;
  --header-h:70px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --ease-out:cubic-bezier(.16,1,.3,1);
  --grad:linear-gradient(135deg,var(--primary),var(--accent));
  --grad-cyan:linear-gradient(135deg,var(--primary-500),var(--accent-2));
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:"PingFang SC","Microsoft YaHei","Segoe UI",system-ui,-apple-system,sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.7;font-size:15px;
  -webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .25s,opacity .25s}
button{font-family:inherit;cursor:pointer;border:none;background:none}
ul{list-style:none}
h1,h2,h3,h4{line-height:1.22;color:var(--dark);font-weight:800;letter-spacing:-.015em}
::selection{background:rgba(20,184,166,.22);color:var(--dark)}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 22px}
.section{padding:92px 0;position:relative}
.section-alt{background:var(--bg-alt)}
.text-muted{color:var(--text-muted)}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:999px;font-weight:700;font-size:15px;position:relative;overflow:hidden;
  transition:transform .25s var(--ease),box-shadow .25s,background .25s;white-space:nowrap}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 14px 30px -10px rgba(16,185,129,.55)}
.btn-primary:hover{box-shadow:0 20px 38px -10px rgba(16,185,129,.68)}
/* 按钮微光扫过 */
.btn-primary::after{content:"";position:absolute;top:0;left:-120%;width:60%;height:100%;
  background:linear-gradient(120deg,transparent,rgba(255,255,255,.45),transparent);transform:skewX(-20deg);
  transition:left .6s var(--ease)}
.btn-primary:hover::after{left:140%}
.btn-ghost{background:#fff;color:var(--primary);border:1.5px solid var(--primary-500)}
.btn-ghost:hover{background:var(--accent-soft)}
.btn-outline{background:transparent;color:var(--primary);border:1.5px solid var(--border-strong)}
.btn-outline:hover{border-color:var(--primary);background:var(--bg-alt)}
.btn-light{background:rgba(255,255,255,.14);color:#fff;border:1px solid rgba(255,255,255,.35);backdrop-filter:blur(4px)}
.btn-light:hover{background:rgba(255,255,255,.26)}

/* ---------- 顶部导航 ---------- */
.topbar{position:fixed;top:0;left:0;right:0;height:var(--header-h);z-index:1000;
  background:rgba(255,255,255,.72);backdrop-filter:saturate(180%) blur(18px);-webkit-backdrop-filter:saturate(180%) blur(18px);
  border-bottom:1px solid transparent;transition:all .35s var(--ease)}
.topbar.scrolled{background:rgba(255,255,255,.92);border-bottom-color:var(--border);
  box-shadow:0 8px 30px -18px rgba(15,23,42,.35)}
.topbar.hidden{transform:translateY(-100%)}
.topbar-inner{max-width:var(--maxw);margin:0 auto;height:100%;padding:0 22px;
  display:flex;align-items:center;justify-content:space-between;gap:18px}
.topbar-logo{display:flex;align-items:center;font-weight:800;font-size:20px;color:var(--primary);gap:8px;letter-spacing:-.01em}
.logo-fallback{display:inline-block;letter-spacing:.02em}
.logo-img{height:38px;width:auto}
.topbar-nav{display:flex;align-items:center;gap:6px}
.topbar-nav a{position:relative;padding:9px 15px;border-radius:11px;font-weight:600;color:var(--dark-2);
  font-size:15px;transition:all .25s}
.topbar-nav a:hover{color:var(--primary);background:var(--bg-alt)}
.topbar-nav a.active{color:var(--primary)}
.topbar-nav a.active::after{content:"";position:absolute;left:15px;right:15px;bottom:5px;height:3px;
  border-radius:3px;background:var(--grad)}
.btn-nav{background:var(--grad);color:#fff!important;
  padding:9px 20px!important;border-radius:999px!important;box-shadow:var(--shadow-sm)}
.btn-nav:hover{transform:translateY(-1px);box-shadow:0 12px 26px -10px rgba(16,185,129,.6)}

/* 移动菜单 */
.hamburger{display:none;width:42px;height:42px;border-radius:11px;position:relative;
  background:var(--bg-alt);border:1px solid var(--border)}
.hamburger span{position:absolute;left:11px;right:11px;height:2px;background:var(--dark);border-radius:2px;
  transition:all .3s var(--ease)}
.hamburger span:nth-child(1){top:15px}
.hamburger span:nth-child(2){top:20px}
.hamburger span:nth-child(3){top:25px}
.hamburger.active span:nth-child(1){top:20px;transform:rotate(45deg)}
.hamburger.active span:nth-child(2){opacity:0}
.hamburger.active span:nth-child(3){top:20px;transform:rotate(-45deg)}
.mobile-menu{position:fixed;inset:var(--header-h) 0 0 0;z-index:999;background:rgba(255,255,255,.98);
  backdrop-filter:blur(10px);opacity:0;visibility:hidden;transform:translateY(-8px);
  transition:all .3s var(--ease);padding:18px 20px}
.mobile-menu.active{opacity:1;visibility:visible;transform:none}
.mobile-menu-inner{display:flex;flex-direction:column;gap:6px}
.mobile-menu-inner a{padding:15px 14px;border-radius:12px;font-weight:700;font-size:17px;color:var(--dark-2);
  border-bottom:1px solid var(--border)}
.mobile-menu-inner a.cta{margin-top:10px;text-align:center;color:#fff;background:var(--grad);border:none}

/* ---------- hero ---------- */
.hero{position:relative;min-height:620px;padding:calc(var(--header-h) + 72px) 0 88px;overflow:hidden;
  background:
    radial-gradient(900px 520px at 85% -12%,rgba(34,211,238,.26),transparent 60%),
    radial-gradient(820px 520px at -5% 110%,rgba(16,185,129,.30),transparent 55%),
    linear-gradient(160deg,#06231f 0%,#0a3530 42%,#0f6e63 100%);
  color:#fff;display:flex;align-items:center}
/* 动态网格底纹 */
.hero::before{content:"";position:absolute;inset:0;z-index:1;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:54px 54px;mask-image:radial-gradient(ellipse 80% 70% at 50% 40%,#000 30%,transparent 75%);
  -webkit-mask-image:radial-gradient(ellipse 80% 70% at 50% 40%,#000 30%,transparent 75%);opacity:.7}
.hero::after{content:"";position:absolute;inset:0;z-index:1;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.06) 1px,transparent 1px);background-size:26px 26px;opacity:.5}
/* 漂浮辉光球 */
.hero-visual{position:relative;z-index:2}
.hero-inner{position:relative;z-index:3;max-width:var(--maxw);margin:0 auto;padding:0 22px;
  width:100%;display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}
.hero-badge{display:inline-flex;align-items:center;gap:8px;padding:7px 15px;border-radius:999px;
  background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.25);
  font-size:13px;font-weight:600;letter-spacing:.02em;margin-bottom:22px;backdrop-filter:blur(6px)}
.hero h1{color:#fff;font-size:clamp(30px,4.6vw,54px);line-height:1.12;margin-bottom:18px;font-weight:850}
.hero h1 .hl{background:linear-gradient(90deg,#6ee7b7,#22d3ee);-webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent}
.hero p{color:rgba(255,255,255,.84);font-size:17px;max-width:540px;margin-bottom:28px}
.hero-btns{display:flex;gap:14px;flex-wrap:wrap}
.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:42px;
  padding-top:30px;border-top:1px solid rgba(255,255,255,.16)}
.hs-item{text-align:left}
.hs-num{font-size:32px;font-weight:850;color:#fff;line-height:1;background:linear-gradient(180deg,#fff,#9ad9cf);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hs-label{font-size:13px;color:rgba(255,255,255,.72);margin-top:6px}

/* hero 卡片（最新动态） */
.hero-card{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.22);
  border-radius:20px;padding:24px;backdrop-filter:blur(8px);box-shadow:0 24px 50px -24px rgba(0,0,0,.5)}
.hero-card h3{color:#fff;font-size:16px;margin-bottom:14px;display:flex;align-items:center;gap:8px}
.hero-card-icon{width:30px;height:30px;border-radius:9px;background:var(--grad);
  display:inline-flex;align-items:center;justify-content:center}
.hero-news-item{display:flex;align-items:center;gap:10px;padding:11px 0;border-bottom:1px solid rgba(255,255,255,.12);
  font-size:14px;color:rgba(255,255,255,.92);transition:padding .2s}
.hero-news-item:hover{padding-left:4px}
.hero-news-item:last-child{border-bottom:none}
.hero-news-item .dot-icon{width:7px;height:7px;border-radius:50%;background:var(--accent);flex:none;box-shadow:0 0 8px var(--accent)}
.hero-news-item span:nth-child(2){flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.hero-news-item time{color:rgba(255,255,255,.55);font-size:12px;flex:none}

/* hero 轮播 */
.hero-slide{position:relative;border-radius:20px;overflow:hidden;margin-bottom:30px;box-shadow:var(--shadow-lg)}
.hero-slide-track{display:flex;transition:transform .6s var(--ease)}
.hero-slide-item{position:relative;min-width:100%}
.hero-slide-item img{width:100%;height:340px;object-fit:cover}
.slide-caption{position:absolute;left:0;right:0;bottom:0;padding:18px 22px;color:#fff;font-weight:700;
  background:linear-gradient(0deg,rgba(6,35,31,.85),transparent)}
.slide-arrow{position:absolute;top:50%;transform:translateY(-50%);width:44px;height:44px;border-radius:50%;
  background:rgba(255,255,255,.85);color:var(--dark);font-size:20px;display:flex;align-items:center;justify-content:center;
  z-index:3;transition:all .25s;backdrop-filter:blur(4px)}
.slide-arrow:hover{background:#fff;transform:translateY(-50%) scale(1.08)}
.slide-prev{left:14px}.slide-next{right:14px}
.slide-dots{position:absolute;bottom:14px;left:0;right:0;display:flex;gap:8px;justify-content:center;z-index:3}
.slide-dot{width:9px;height:9px;border-radius:50%;background:rgba(255,255,255,.5);transition:all .25s;cursor:pointer}
.slide-dot.active{background:#fff;width:24px;border-radius:5px}

/* ---------- section header ---------- */
.section-header{text-align:center;max-width:700px;margin:0 auto 56px}
.section-header .label{display:inline-block;font-size:13px;font-weight:700;letter-spacing:.14em;
  text-transform:uppercase;color:var(--primary);background:var(--accent-soft);
  padding:6px 15px;border-radius:999px;margin-bottom:16px}
.section-header h2{font-size:clamp(25px,3.1vw,36px);margin-bottom:12px;letter-spacing:-.02em}
.section-header p{color:var(--text-muted);font-size:16px}
.section-cta{text-align:center;margin-top:42px}

/* ---------- 核心业务 ---------- */
.services-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.service-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;
  transition:transform .35s var(--ease),box-shadow .35s,border-color .35s;display:flex;flex-direction:column;position:relative}
.service-card::before{content:"";position:absolute;inset:0;border-radius:var(--radius);padding:1.5px;
  background:var(--grad);-webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;opacity:0;transition:opacity .35s;pointer-events:none}
.service-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg);border-color:transparent}
.service-card:hover::before{opacity:1}
.service-card-link{display:flex;flex-direction:column;height:100%}
.service-img{height:170px;display:flex;align-items:center;justify-content:center;overflow:hidden;position:relative}
.service-img img{width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease)}
.service-card:hover .service-img img{transform:scale(1.07)}
.service-img-text{color:#fff;font-size:22px;font-weight:800;letter-spacing:.04em}
.service-body{padding:22px 22px 16px}
.service-body h3{font-size:19px;margin-bottom:8px}
.service-body p{color:var(--text-muted);font-size:14px;min-height:42px}
.service-subs{display:flex;flex-wrap:wrap;gap:8px;padding:0 22px 22px}
.service-subs a{font-size:13px;padding:5px 12px;border-radius:999px;background:var(--bg-alt);
  color:var(--dark-2);border:1px solid var(--border);transition:all .2s}
.service-subs a:hover{background:var(--accent-soft);color:var(--primary);border-color:var(--primary-500)}

/* ---------- 企业优势 / 通用卡片 ---------- */
.strength-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.strength-card,.info-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);
  padding:28px 24px;transition:transform .35s var(--ease),box-shadow .35s;position:relative;overflow:hidden}
.strength-card::after,.info-card::after{content:"";position:absolute;top:-40%;right:-30%;width:160px;height:160px;
  border-radius:50%;background:radial-gradient(circle,rgba(16,185,129,.14),transparent 70%);
  opacity:0;transition:opacity .4s}
.strength-card:hover,.info-card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.strength-card:hover::after,.info-card:hover::after{opacity:1}
.strength-icon,.info-card .icon{width:54px;height:54px;border-radius:14px;display:flex;align-items:center;
  justify-content:center;color:#fff;margin-bottom:18px;background:var(--grad);box-shadow:0 12px 24px -10px rgba(16,185,129,.5)}
.info-card .icon.si-blue{background:linear-gradient(135deg,#0ea5e9,#2563eb);box-shadow:0 12px 24px -10px rgba(37,99,235,.5)}
.info-card .icon.si-green{background:var(--grad);box-shadow:0 12px 24px -10px rgba(16,185,129,.5)}
.info-card .icon.si-orange{background:linear-gradient(135deg,#f59e0b,#ea580c);box-shadow:0 12px 24px -10px rgba(234,88,12,.5)}
.info-card .icon.si-red{background:linear-gradient(135deg,#ef4444,#dc2626);box-shadow:0 12px 24px -10px rgba(220,38,38,.5)}
.info-card .icon.si-purple{background:linear-gradient(135deg,#8b5cf6,#7c3aed);box-shadow:0 12px 24px -10px rgba(124,58,237,.5)}
.strength-card h3,.info-card h3{font-size:18px;margin-bottom:10px}
.strength-card p,.info-card p{color:var(--text-muted);font-size:14px}

/* ---------- 关于我们首页 teaser ---------- */
.about-teaser{display:grid;grid-template-columns:1.4fr 1fr;gap:40px;align-items:center}
.about-teaser-text p{color:var(--text-muted);margin-bottom:14px;font-size:15px}
.about-teaser-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin:24px 0}
.ats-item{background:var(--bg-alt);border-radius:var(--radius-sm);padding:16px 10px;text-align:center;border:1px solid var(--border);
  transition:transform .25s,box-shadow .25s}
.ats-item:hover{transform:translateY(-4px);box-shadow:var(--shadow-sm)}
.ats-num{font-size:26px;font-weight:850;color:var(--primary)}
.ats-label{font-size:12px;color:var(--text-muted);margin-top:4px}
.about-teaser-img img{border-radius:var(--radius);box-shadow:var(--shadow);width:100%}

/* ---------- 新闻动态 ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;
  transition:transform .35s var(--ease),box-shadow .35s,border-color .35s}
.news-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg);border-color:var(--primary-400)}
.news-card .thumb{position:relative;height:180px;overflow:hidden;background:var(--bg-alt)}
.news-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease)}
.news-card:hover .thumb img{transform:scale(1.07)}
.thumb-placeholder{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  background:var(--grad);color:#fff;font-size:42px;font-weight:800}
.cat-tag{position:absolute;top:12px;left:12px;background:rgba(15,118,110,.92);color:#fff;font-size:12px;
  font-weight:600;padding:4px 11px;border-radius:999px;backdrop-filter:blur(4px)}
.pin-tag{position:absolute;top:12px;right:12px;background:var(--accent);color:#fff;font-size:12px;
  font-weight:600;padding:4px 11px;border-radius:999px;box-shadow:0 6px 14px -6px rgba(16,185,129,.7)}
.news-card .body{padding:18px 20px 22px}
.news-card .body h3{font-size:16px;margin-bottom:10px;line-height:1.45;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card .desc{color:var(--text-muted);font-size:13px;margin-bottom:12px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card .meta{display:flex;justify-content:space-between;align-items:center;
  font-size:12px;color:var(--text-muted);border-top:1px solid var(--border);padding-top:12px}
.news-card .meta .views{color:var(--primary);font-weight:600}

/* ---------- 合作伙伴 ---------- */
.partners-grid{display:flex;flex-wrap:wrap;gap:16px;justify-content:center}
.partner-item{display:flex;align-items:center;justify-content:center;min-width:150px;padding:18px 24px;
  background:#fff;border:1px solid var(--border);border-radius:var(--radius-sm);font-weight:600;color:var(--dark-2);
  transition:all .25s var(--ease)}
.partner-item:hover{border-color:var(--primary-500);color:var(--primary);transform:translateY(-3px);
  box-shadow:var(--shadow-sm)}

/* ---------- 合作咨询表单 ---------- */
.form-section{padding:92px 0;background:
  radial-gradient(700px 400px at 90% 0%,rgba(34,211,238,.18),transparent 60%),
  radial-gradient(700px 400px at 0% 100%,rgba(16,185,129,.22),transparent 60%),
  linear-gradient(160deg,#06231f,#0a3530);color:#fff;position:relative;overflow:hidden}
.form-section::before{content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:radial-gradient(rgba(255,255,255,.05) 1px,transparent 1px);background-size:26px 26px}
.form-wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px;position:relative;z-index:2}
.form-section .section-header h2{color:#fff}
.form-section .section-header p{color:rgba(255,255,255,.78)}
.form-container{display:grid;grid-template-columns:1.4fr .8fr;gap:36px;align-items:start;margin-top:8px}
.form-main{background:#fff;border-radius:var(--radius);padding:34px;box-shadow:var(--shadow-lg)}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form-group{display:flex;flex-direction:column;gap:7px}
.form-group.full{grid-column:1/-1}
.form-group label{font-size:13px;font-weight:600;color:var(--dark-2)}
.form-group .req{color:#ef4444}
.form-group input,.form-group select,.form-group textarea{
  padding:12px 14px;border:1.5px solid var(--border);border-radius:var(--radius-sm);font-size:14px;
  font-family:inherit;color:var(--ink);background:#fff;transition:border-color .2s,box-shadow .2s;width:100%}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{
  outline:none;border-color:var(--primary-500);box-shadow:0 0 0 4px rgba(16,185,129,.15)}
.form-group textarea{min-height:96px;resize:vertical}
.form-agree{display:flex;align-items:center;gap:8px;margin:18px 0;font-size:13px;color:var(--text-muted)}
.form-agree input{width:auto}
.form-agree a{color:var(--primary);text-decoration:underline}
.btn-submit{width:100%;padding:15px;border-radius:999px;font-weight:800;font-size:16px;color:#fff;
  background:var(--grad);box-shadow:0 14px 30px -10px rgba(16,185,129,.55);position:relative;overflow:hidden;
  transition:transform .2s,box-shadow .2s}
.btn-submit:hover{transform:translateY(-2px);box-shadow:0 20px 38px -10px rgba(16,185,129,.68)}
.btn-submit:disabled{opacity:.7;cursor:not-allowed}
.form-success{display:none;text-align:center;padding:30px 10px}
.form-success.show{display:block}
.form-success .icon{width:64px;height:64px;border-radius:50%;background:var(--accent);color:#fff;
  font-size:34px;display:flex;align-items:center;justify-content:center;margin:0 auto 16px;box-shadow:0 14px 30px -10px rgba(16,185,129,.6)}
.form-info{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);border-radius:var(--radius);padding:28px;backdrop-filter:blur(6px)}
.form-info h3{color:#fff;font-size:18px;margin-bottom:16px}
.form-info ul li{position:relative;padding:10px 0 10px 28px;color:rgba(255,255,255,.9);border-bottom:1px solid rgba(255,255,255,.1);font-size:14px}
.form-info ul li::before{content:"✓";position:absolute;left:0;top:10px;color:var(--accent);font-weight:800}
#phoneError{display:none;color:#fca5a5;font-size:12px;margin-top:-4px}
.spinner{display:inline-block;width:15px;height:15px;border:2px solid rgba(255,255,255,.5);
  border-top-color:#fff;border-radius:50%;animation:spin .7s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- 页脚 ---------- */
.footer{background:var(--bg-deep);color:rgba(255,255,255,.78);padding:64px 0 0;position:relative;overflow:hidden}
.footer::before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,var(--primary-500),var(--accent),transparent)}
.footer-grid{max-width:var(--maxw);margin:0 auto;padding:0 22px;display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px}
.footer-col h4{color:#fff;font-size:15px;margin-bottom:16px;position:relative;padding-bottom:10px}
.footer-col h4::after{content:"";position:absolute;left:0;bottom:0;width:34px;height:3px;border-radius:3px;background:var(--grad)}
.footer-col p{font-size:13px;margin-bottom:10px;line-height:1.7}
.footer-col .footer-contact{color:#fff;font-weight:700;font-size:16px}
.footer-col a{display:block;font-size:13px;color:rgba(255,255,255,.7);padding:6px 0;transition:color .2s,padding .2s}
.footer-col a:hover{color:var(--accent);padding-left:5px}
.footer-bottom{max-width:var(--maxw);margin:42px auto 0;padding:20px 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,.6)}
.footer-bottom a:hover{color:var(--accent)}

/* 返回顶部 */
.back-to-top{position:fixed;right:22px;bottom:22px;width:46px;height:46px;border-radius:50%;
  background:var(--grad);color:#fff;font-size:20px;z-index:900;
  display:flex;align-items:center;justify-content:center;opacity:0;visibility:hidden;transform:translateY(12px);
  transition:all .3s var(--ease);box-shadow:var(--shadow)}
.back-to-top.show{opacity:1;visibility:visible;transform:none}
.back-to-top:hover{transform:translateY(-3px);box-shadow:0 16px 32px -10px rgba(16,185,129,.6)}

/* ---------- 内页通用 ---------- */
.page-main{padding-top:var(--header-h)}
.page-hero{background:
  radial-gradient(700px 380px at 85% -10%,rgba(34,211,238,.22),transparent 60%),
  radial-gradient(640px 380px at 0% 120%,rgba(16,185,129,.26),transparent 55%),
  linear-gradient(160deg,#06231f,#0a3530);color:#fff;padding:68px 0 58px;position:relative;overflow:hidden}
.page-hero::after{content:"";position:absolute;inset:0;z-index:1;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.05) 1px,transparent 1px);background-size:26px 26px}
.page-hero-inner{max-width:var(--maxw);margin:0 auto;padding:0 22px;position:relative;z-index:2}
.page-hero-badge{display:inline-block;font-size:12px;font-weight:700;letter-spacing:.18em;
  color:var(--accent);margin-bottom:14px}
.page-hero h1{color:#fff;font-size:clamp(26px,3.4vw,40px);margin-bottom:10px}
.page-hero p{color:rgba(255,255,255,.8);font-size:16px}

/* 列表页 layout */
.layout{max-width:var(--maxw);margin:0 auto;padding:48px 22px;display:grid;
  grid-template-columns:280px 1fr;gap:36px;align-items:start}
.sidebar{position:sticky;top:calc(var(--header-h) + 16px);display:flex;flex-direction:column;gap:20px}
.sidebar-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:20px}
.sidebar-card h3{font-size:15px;margin-bottom:14px;padding-bottom:10px;border-bottom:1px solid var(--border)}
.sidebar-card a{display:block;padding:9px 12px;border-radius:9px;font-size:14px;color:var(--dark-2);
  transition:all .2s;margin-bottom:2px}
.sidebar-card a:hover{background:var(--bg-alt);color:var(--primary)}
.sidebar-card a.act{background:var(--accent-soft);color:var(--primary);font-weight:700}
.tag-cloud{display:flex;flex-wrap:wrap;gap:8px}
.tag-cloud a{display:inline-block;padding:6px 12px;border-radius:999px;background:var(--bg-alt);
  border:1px solid var(--border);font-size:13px;color:var(--dark-2)}
.tag-cloud a:hover{background:var(--accent-soft);color:var(--primary)}
.hot-item{display:flex;align-items:center;gap:10px;padding:9px 0;border-bottom:1px solid var(--border);font-size:14px}
.hot-num{width:22px;height:22px;border-radius:6px;background:var(--bg-alt);color:var(--text-muted);
  display:flex;align-items:center;justify-content:center;font-weight:700;font-size:12px;flex:none}
.hot-num.top{background:var(--grad);color:#fff}
.main-content{min-width:0}

/* 分页 */
.pagination-info{text-align:center;color:var(--text-muted);font-size:13px;margin:24px 0 12px}
.pagination{display:flex;justify-content:center;flex-wrap:wrap;gap:8px;margin-top:8px}
.pagination a,.pagination span{padding:9px 14px;border-radius:9px;border:1px solid var(--border);
  font-size:14px;color:var(--dark-2);background:#fff;transition:all .2s}
.pagination a:hover{border-color:var(--primary-500);color:var(--primary)}
.pagination .current{background:var(--grad);color:#fff;border-color:transparent;box-shadow:var(--shadow-sm)}
.pagination .disabled{opacity:.45;pointer-events:none}

.empty-state{text-align:center;padding:80px 20px;color:var(--text-muted)}
.empty-state .empty-icon{width:80px;height:80px;border-radius:50%;margin:0 auto 18px;
  background:var(--bg-alt);color:var(--border-strong);display:flex;align-items:center;justify-content:center;
  font-size:36px;font-weight:800}
.empty-state h1,.empty-state h3{color:var(--dark);margin-bottom:8px}
.empty-state a{display:inline-block;margin-top:16px;color:var(--primary);font-weight:700;text-decoration:underline}

/* 面包屑 */
.breadcrumb{max-width:var(--maxw);margin:0 auto;padding:18px 22px 0;font-size:13px;color:var(--text-muted)}
.breadcrumb a:hover{color:var(--primary)}

/* 文章详情 */
.article-wrap{max-width:840px;margin:0 auto;padding:24px 22px 60px}
.article-header h1{font-size:clamp(24px,3vw,32px);margin-bottom:14px}
.article-meta{display:flex;align-items:center;gap:14px;flex-wrap:wrap;font-size:13px;color:var(--text-muted);margin-bottom:20px}
.article-cat{background:var(--accent-soft);color:var(--primary);padding:3px 10px;border-radius:999px;font-weight:600}
.article-pin{background:var(--accent);color:#fff;padding:3px 10px;border-radius:999px;font-weight:600}
.article-cover{margin:18px 0;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm)}
.article-cover img{width:100%}
.article-summary{background:var(--bg-alt);border-left:4px solid var(--primary-500);padding:14px 18px;
  border-radius:0 var(--radius-sm) var(--radius-sm) 0;color:var(--dark-2);font-size:15px;margin-bottom:24px}
.article-body{font-size:16px;line-height:1.85;color:var(--dark-2)}
.article-body h1,.article-body h2,.article-body h3,.article-body h4{color:var(--dark);margin:30px 0 16px;line-height:1.4}
.article-body h2{font-size:24px;padding-bottom:10px;border-bottom:2px solid var(--gray-100)}
.article-body h3{font-size:20px}
.article-body h4{font-size:17px}
.article-body p{margin:16px 0}
.article-body ul,.article-body ol{margin:16px 0;padding-left:26px}
.article-body li{margin:8px 0}
.article-body a{color:var(--primary);text-decoration:underline}
.article-body blockquote{margin:18px 0;padding:14px 20px;background:var(--bg-alt);border-left:4px solid var(--accent);border-radius:0 var(--radius-sm) var(--radius-sm) 0;color:var(--dark-2)}
.article-tags{margin:30px 0;display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.article-tags span{color:var(--text-muted);font-size:14px}
.article-tags a{display:inline-block;padding:6px 14px;border-radius:999px;background:var(--bg-alt);
  border:1px solid var(--border);font-size:13px;color:var(--dark-2)}
.article-tags a:hover{background:var(--accent-soft);color:var(--primary)}
.ai-badge{display:inline-block;margin:14px 0;padding:6px 14px;border-radius:999px;font-size:12px;
  background:#fff7ed;color:#c2410c;border:1px solid #fed7aa}
.article-nav{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:36px 0}
.article-nav a{display:flex;flex-direction:column;gap:4px;padding:18px 20px;border:1px solid var(--border);
  border-radius:var(--radius);transition:all .2s}
.article-nav a:hover{border-color:var(--primary-500);background:var(--bg-alt);transform:translateY(-2px)}
.article-nav .nav-label{font-size:12px;color:var(--text-muted)}
.article-nav .nav-title{font-weight:700;color:var(--dark);font-size:14px;
  display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden}
.article-nav-next{text-align:right}
.related-box{margin-top:40px;padding-top:28px;border-top:1px solid var(--border)}
.related-box h3{font-size:20px;margin-bottom:18px}
.related-list{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.related-list a{display:block;padding:14px 16px;border:1px solid var(--border);border-radius:var(--radius-sm);
  font-size:14px;color:var(--dark-2);transition:all .2s}
.related-list a:hover{border-color:var(--primary-500);color:var(--primary);background:var(--bg-alt)}

/* 关于页 */
.about-content{max-width:var(--maxw);margin:0 auto;padding:48px 22px 60px}
.about-intro,.about-custom{margin-bottom:40px}
.about-intro h2,.about-content h2{font-size:26px;margin:36px 0 20px;position:relative;padding-left:16px}
.about-intro h2::before,.about-content h2::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:5px;border-radius:5px;background:var(--grad)}
.about-intro p{color:var(--text-muted);margin-bottom:14px;font-size:15px}
.stats-bar{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin:8px 0 36px}
.stat-box{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:24px 16px;text-align:center;transition:transform .25s,box-shadow .25s}
.stat-box:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.stat-box .num{font-size:34px;font-weight:850;color:var(--primary);line-height:1}
.stat-box .label{font-size:13px;color:var(--text-muted);margin-top:8px}
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-bottom:20px}
.timeline{position:relative;padding-left:30px;margin-top:10px}
.timeline::before{content:"";position:absolute;left:9px;top:6px;bottom:6px;width:2px;background:var(--border)}
.tl-item{position:relative;padding:0 0 28px 10px}
.tl-item:last-child{padding-bottom:0}
.tl-dot{position:absolute;left:-26px;top:4px;width:18px;height:18px;border-radius:50%;
  background:var(--grad);border:3px solid #fff;box-shadow:0 0 0 2px var(--accent-soft)}
.tl-content h4{font-size:16px;margin-bottom:4px}
.tl-content p{color:var(--text-muted);font-size:14px}

/* 服务页 */
.service-list{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;margin-top:8px}

/* ---------- toast ---------- */
.toast{position:fixed;left:50%;bottom:40px;transform:translate(-50%,20px);
  background:var(--dark);color:#fff;padding:13px 22px;border-radius:999px;font-size:14px;font-weight:600;
  z-index:2000;opacity:0;visibility:hidden;transition:all .3s var(--ease);
  display:flex;align-items:center;gap:8px;box-shadow:0 16px 40px -12px rgba(0,0,0,.4)}
.toast.show{opacity:1;visibility:visible;transform:translate(-50%,0)}
.toast.success{background:var(--grad)}
.toast.error{background:#dc2626}
.toast-icon{font-weight:800}

/* ---------- 动画（渐进增强：无 JS 时内容默认可见，避免 app.js 未加载导致空白） ---------- */
html.js .reveal{opacity:0;transform:translateY(28px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
html.js .reveal.visible{opacity:1;transform:none}
.count-up{font-variant-numeric:tabular-nums}

/* tab（兼容 app.js 钩子，若页面未用则无副作用） */
.tab-btn{cursor:pointer}.tab-pane{display:none}.tab-pane.active{display:block}

/* ---------- 响应式 ---------- */
@media (max-width:980px){
  .hero-inner{grid-template-columns:1fr;gap:30px}
  .hero-visual{order:-1}
  .services-grid,.news-grid,.strength-grid,.card-grid{grid-template-columns:repeat(2,1fr)}
  .about-teaser,.form-container,.layout,.footer-grid{grid-template-columns:1fr}
  .sidebar{position:static;flex-direction:row;flex-wrap:wrap}
  .sidebar-card{flex:1;min-width:220px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .related-list{grid-template-columns:1fr}
}
@media (max-width:680px){
  .section{padding:64px 0}
  .topbar-nav{display:none}
  .hamburger{display:block}
  .services-grid,.news-grid,.strength-grid,.card-grid,.stats-bar,.about-teaser-stats,.service-list{grid-template-columns:1fr}
  .form-grid{grid-template-columns:1fr}
  .hero-stats{grid-template-columns:repeat(2,1fr)}
  .article-nav{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .hero h1{font-size:30px}
  .form-main,.form-info{padding:24px}
}

/* 无障碍：尊重减少动画偏好 */
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important;scroll-behavior:auto!important}
  .reveal{opacity:1;transform:none}
}