/* ═══════════════════════════════════════════
   玉林人工智能开放平台 — 设计系统 V4
   严格像素级对标百度云首页 2637x9477px
   所有颜色从参考图逐区域提取
   ═══════════════════════════════════════════ */

:root {
  /* ── 从参考图提取的核心色 ── */
  --nav-top:     #dce6f8;
  --nav-mid:     #edf3fb;
  --nav-bot:     #f4f8fd;
  --nav-text:    #4a6390;
  --nav-active:  #1a5cf0;

  --brand:       #2563eb;
  --brand-dark:  #1d4ed8;
  --brand-5:     rgba(37,99,235,0.05);
  --brand-10:    rgba(37,99,235,0.1);
  --deep:        #1e3a8a;

  --hero-grad1:  #e8f2fe;
  --hero-grad2:  #f0f6ff;
  --hero-grad3:  #e8f0fd;
  --hero-grad4:  #dce6f8;
  --hero-grad5:  #c8d6f0;

  --bg-sky:      #d3eefd;   /* 天蓝区块 */
  --bg-gray:     #f2f5f9;   /* 浅灰区块 */
  --bg-ice:      #f1f6fe;   /* 冰蓝区块 */
  --bg-white:    #ffffff;
  --bg-blue:     #e8f2fe;   /* 浅蓝背景 */

  --footer:      #151b26;

  --text-h1:     #091221;
  --text-h2:     #0e1726;
  --text-body:   #4a5568;
  --text-muted:  #868a92;

  --border:      #e5eaf2;
  --border-light:#f0f3f8;

  --shadow-sm:   0 1px 3px rgba(0,0,0,0.04);
  --shadow-md:   0 4px 12px rgba(0,0,0,0.06);
  --shadow-lg:   0 8px 24px rgba(0,0,0,0.08);
  --shadow-xl:   0 12px 40px rgba(0,0,0,0.12);

  --r-sm: 6px;
  --r-md: 8px;
  --r-lg: 12px;
  --r-xl: 16px;

  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --fast: 0.15s ease;
  --base: 0.25s ease;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased}
body{font-family:var(--font);font-size:14px;line-height:1.6;color:var(--text-body);background:var(--bg-white);overflow-x:hidden;min-width:1200px}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
ul{list-style:none}

/* 滚动条（复刻自中台后台原型 css/style.css） */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(148,163,184,.3); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(148,163,184,.5); }

.wrap,.container{max-width:1200px;margin:0 auto;padding:0 32px}

/* ═══════════ 导航 — 浅蓝紫渐变，对标百度 ═══════════ */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  background:linear-gradient(180deg, var(--nav-top) 0%, var(--nav-mid) 50%, var(--nav-bot) 100%);
  height:64px;
  transition:box-shadow var(--base);
}
.nav.scrolled{box-shadow:0 2px 16px rgba(0,0,0,0.08)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px;max-width:1920px;margin:0 auto;padding:0 32px}
.nav .logo{display:flex;align-items:center;gap:2px;flex-shrink:0;margin-right:24px;text-decoration:none}
.nav .logo img.nav-logo-img{height:24px;width:auto;display:block;flex-shrink:0}
/* 品牌字 —— 正楷（端庄规整）+ 深品牌蓝（浅底清晰） */
.nav .logo-text{
  font-family:'KaiTi','楷体','STKaiti','华文楷体','SimKai',serif;
  font-size:24px;font-weight:700;line-height:1;font-style:normal;
  margin-left:10px;letter-spacing:2px;white-space:nowrap;
  color:#1d4ed8;-webkit-font-smoothing:antialiased;
}
.nav .logo-text:hover{color:#4338ca}
.nav .logo-title{font-size:16px;font-weight:700;color:#1a1a1a;line-height:1.2;white-space:nowrap}
.nav .logo-subtitle{font-size:10px;color:#9ca3af;line-height:1.2;font-weight:400;white-space:nowrap}
.nav nav{display:flex;align-items:center;gap:2px;flex-shrink:1;overflow:visible;min-width:0}
.nav nav a{padding:8px 14px;font-size:15px;font-weight:550;color:var(--nav-text);border-radius:6px;transition:all var(--fast);white-space:nowrap;text-decoration:none;font-family:'Microsoft YaHei','PingFang SC',sans-serif}
.nav nav a:hover,.nav nav a.active{color:var(--nav-active);background:rgba(37,99,235,0.06)}
.nav .nav-right{display:flex;align-items:center;gap:12px;flex-shrink:0;margin-left:16px}
.nav .nav-right a{font-size:13px;color:var(--nav-text);text-decoration:none}
.nav .nav-right .btn-login{padding:7px 18px;font-size:13px;font-weight:500;font-family:'Source Han Sans','PingFang SC','Microsoft YaHei',sans-serif;color:#8BABC4;background:#F7FAFF;border:1px solid #BED4FF;box-shadow:0px 3px 5px 0px rgba(0,0,0,0.06);border-radius:15px;white-space:nowrap;transition:all var(--fast)}
.nav .nav-right .btn-login:hover{background:#EDF3FF;border-color:#8BABC4}
.nav .nav-right .btn-register{padding:7px 18px;font-size:13px;font-weight:500;color:#fff;background:var(--brand);border-radius:15px;white-space:nowrap;transition:all var(--fast)}
.nav .nav-right .btn-register:hover{background:var(--brand-dark)}
.nav .nav-right .btn-nav{background:var(--brand);color:#fff;padding:7px 18px;border-radius:var(--r-sm);font-weight:600;font-size:13px;transition:all var(--fast)}
.nav .nav-right .btn-nav:hover{background:var(--brand-dark)}

/* ── 个人中心（下拉菜单） ── */
.nav .user-center{position:relative;display:inline-flex;align-items:center}
.nav .user-center-btn{display:flex;align-items:center;gap:6px;padding:7px 18px;font-size:13px;font-weight:500;color:var(--nav-text);background:#F7FAFF;border:1px solid #BED4FF;border-radius:15px;box-shadow:0px 3px 5px 0px rgba(0,0,0,0.06);cursor:pointer;white-space:nowrap;transition:all var(--fast);font-family:inherit}
.nav .user-center-btn:hover{background:#EDF3FF;border-color:#8BABC4;color:var(--brand)}
.nav .user-center-btn .uc-avatar{width:22px;height:22px;border-radius:50%;background:linear-gradient(135deg,var(--brand),#4f8bf9);color:#fff;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;flex-shrink:0}
.nav .user-center-btn .uc-arrow{font-size:10px;transition:transform 0.15s;margin-left:2px;color:#8BABC4}
.nav .user-center.open .uc-arrow{transform:rotate(180deg)}
.nav .user-center-menu{position:absolute;top:calc(100% + 6px);right:0;min-width:170px;background:#fff;border:1px solid var(--border);border-radius:10px;box-shadow:0 8px 24px rgba(0,0,0,0.12);padding:6px 0;opacity:0;visibility:hidden;transform:translateY(-4px);transition:all 0.2s;z-index:1000;list-style:none;margin:0}
.nav .user-center.open .user-center-menu{opacity:1;visibility:visible;transform:translateY(0)}
.nav .user-center-menu a{display:flex;align-items:center;gap:8px;padding:10px 16px;font-size:13px;color:var(--text-body);text-decoration:none;white-space:nowrap;transition:all 0.15s;cursor:pointer}
.nav .user-center-menu a:hover{background:var(--brand-5);color:var(--brand)}
.nav .user-center-menu .uc-name{font-size:13px;font-weight:600;color:var(--text-h2);padding:8px 16px 6px;border-bottom:1px solid var(--border-light);margin-bottom:6px;white-space:nowrap}
.nav .user-center-menu .uc-role-card{display:flex;align-items:center;gap:10px;padding:10px 16px;border-bottom:1px solid var(--border-light);margin-bottom:6px;cursor:default}
.nav .user-center-menu .uc-role-avatar{width:34px;height:34px;border-radius:10px;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.nav .user-center-menu .uc-role-avatar svg{width:18px;height:18px;display:block}
.nav .user-center-menu .uc-role-info{display:flex;flex-direction:column;gap:1px;min-width:0}
.nav .user-center-menu .uc-role-name{font-size:13px;font-weight:650;color:var(--text-h2);line-height:1.3;white-space:nowrap}
.nav .user-center-menu .uc-role-desc{font-size:11px;color:var(--text-muted);line-height:1.4;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.nav .user-center-menu .uc-logout{border-top:1px solid var(--border-light);margin-top:6px;padding-top:8px}
.nav .user-center-menu .uc-logout a{color:var(--text-muted)}
.nav .user-center-menu .uc-logout a:hover{color:#dc2626;background:#fef2f2}
.nav .user-center-menu .uc-menu-icon{display:inline-flex;align-items:center;justify-content:center;width:16px;flex-shrink:0;color:var(--text-muted)}
.nav .user-center-menu a:hover .uc-menu-icon{color:var(--brand)}
.nav .user-center-menu .uc-logout a:hover .uc-menu-icon{color:#dc2626}

/* ── 个人中心 · 角色标签（已登录时显示当前角色） ── */
.nav .user-center-btn .uc-role{display:inline-flex;align-items:center;padding:2px 8px;border-radius:999px;background:rgba(37,99,235,.1);color:#2563eb;font-size:11px;font-weight:600;white-space:nowrap}

/* ── 选择角色弹窗 ── */
.rxy-modal-mask{position:fixed;inset:0;background:rgba(15,23,42,.45);backdrop-filter:blur(6px);z-index:2000;display:flex;align-items:center;justify-content:center}
.rxy-modal{background:#fff;border-radius:16px;box-shadow:0 20px 60px rgba(15,23,42,.2);width:100%;max-width:760px;margin:0 16px;overflow:hidden}
.rxy-modal-head{display:flex;align-items:center;justify-content:space-between;padding:18px 24px;border-bottom:1px solid #F1F5F9;background:linear-gradient(135deg,rgba(42,109,255,.06),rgba(42,109,255,0))}
.rxy-modal-x{color:#94A3B8;display:flex;padding:6px;border-radius:8px;background:none;border:none;cursor:pointer;font-family:inherit}
.rxy-modal-x:hover{color:#475569;background:#F8FAFC}
.rxy-modal-body{padding:20px;text-align:left}
.rxy-modal-foot{display:flex;justify-content:flex-end;padding:16px 24px;border-top:1px solid #F1F5F9;background:#F8FAFC}
.rxy-btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;height:36px;padding:0 16px;border-radius:8px;font-size:13px;font-weight:530;cursor:pointer;transition:background .15s,color .15s,border-color .15s;white-space:nowrap;font-family:inherit}
.rxy-btn-ghost{background:#fff;border:1px solid #E2E8F0;color:#475569}
.rxy-btn-ghost:hover{background:#F8FAFC}
.rxy-role-card{background:rgba(255,255,255,.62);border:1px solid rgba(255,255,255,.75);border-radius:16px;padding:20px 12px 16px;text-align:center;cursor:pointer;transition:all .25s;position:relative;overflow:hidden}
.rxy-role-card:hover{transform:translateY(-4px);box-shadow:0 12px 24px rgba(0,0,0,.1);border-color:rgba(42,109,255,.35)}
.rxy-role-ico{width:52px;height:52px;margin:0 auto 10px;border-radius:16px;display:flex;align-items:center;justify-content:center}
.rxy-role-ico svg{width:22px;height:22px}
.rxy-role-label{font-size:13px;font-weight:610;color:#0F172A}
.rxy-role-desc{font-size:11px;color:#64748B;margin-top:4px;line-height:1.5}

/* 导航响应式 */
@media(max-width:1400px){
  .nav nav a{padding:8px 10px;font-size:14px}
  .nav .nav-right{gap:8px;margin-left:10px}
  .nav .nav-right a{font-size:12px}
  .nav .nav-right .btn-login,
  .nav .nav-right .btn-register{padding:6px 14px;font-size:12px}
  .nav .nav-right .user-center-btn{padding:6px 14px;font-size:12px}
  .nav .nav-right .btn-nav{padding:6px 14px;font-size:12px}
}
@media(max-width:1200px){
  .nav nav a{padding:6px 8px;font-size:13px}
  .nav nav{gap:1px}
  .nav .logo{margin-right:12px}
  .nav .nav-right{gap:6px;margin-left:8px}
  .nav .nav-right a{font-size:11px}
  .nav .nav-right .btn-login,
  .nav .nav-right .btn-register{padding:5px 10px;font-size:11px}
  .nav .nav-right .user-center-btn{padding:5px 10px;font-size:11px}
  .nav .nav-right .btn-nav{padding:5px 10px;font-size:11px}
}
@media(max-width:1024px){
  .nav nav a{padding:5px 6px;font-size:12px}
  .nav .nav-right a{font-size:10px}
  .nav .nav-right .btn-login,
  .nav .nav-right .btn-register{padding:4px 8px;font-size:10px}
  .nav .nav-right .user-center-btn{padding:4px 8px;font-size:10px}
  .nav .nav-right .btn-nav{padding:4px 8px;font-size:10px}
  .nav-inner{padding:0 16px}
}

/* ═══════════ Hero — 大Hero，对标百度 ═══════════ */
.hero{
  position:relative;
  margin-top:64px;
  min-height:540px;
  display:flex;align-items:center;
  background:linear-gradient(175deg, var(--hero-grad1) 0%, var(--hero-grad2) 25%, var(--hero-grad3) 55%, var(--hero-grad4) 78%, var(--hero-grad5) 100%);
  overflow:hidden;
}
.hero::before{content:'';position:absolute;top:-100px;right:-80px;width:400px;height:400px;border-radius:50%;background:radial-gradient(circle,rgba(37,99,235,0.06) 0%,transparent 70%)}
.hero::after{content:'';position:absolute;bottom:-120px;left:-100px;width:500px;height:500px;border-radius:50%;background:radial-gradient(circle,rgba(37,99,235,0.04) 0%,transparent 70%)}

.hero-slide{position:absolute;inset:0;opacity:0;transition:opacity 0.6s ease;display:flex;align-items:center;pointer-events:none}
.hero-slide.active{opacity:1;z-index:1;pointer-events:auto}
.hero-inner{display:flex;align-items:center;gap:64px;position:relative;z-index:1;width:100%}
.hero-text{flex:1;max-width:540px}
.hero-text .hero-tag{display:inline-block;padding:5px 16px;background:rgba(37,99,235,0.08);color:var(--brand);font-size:12px;font-weight:600;border-radius:100px;margin-bottom:20px;letter-spacing:0.02em}
.hero-text h1{font-size:46px;font-weight:800;line-height:1.15;color:var(--text-h1);margin-bottom:18px;letter-spacing:-0.03em}
.hero-text h1 em{font-style:normal;color:var(--brand)}
.hero-text p{font-size:15px;color:var(--text-muted);line-height:1.7;margin-bottom:32px;max-width:460px}
.hero-cts{display:flex;gap:12px;align-items:center}
.hero-cts .btn-ghost{padding:11px 28px;font-size:14px;font-weight:600;color:var(--brand);background:transparent;border:none;cursor:pointer;font-family:var(--font);display:inline-flex;align-items:center;gap:6px;border-radius:var(--r-sm);transition:all var(--fast)}
.hero-cts .btn-ghost:hover{background:rgba(37,99,235,0.06)}

.hero-visual{flex:0 0 440px;display:flex;align-items:center;justify-content:center}
.hero-visual .hv-card{background:#fff;border-radius:var(--r-xl);padding:32px;box-shadow:var(--shadow-xl);width:100%;min-height:300px;display:flex;align-items:center;justify-content:center;font-size:90px;border:1px solid rgba(0,0,0,0.04)}

/* 轮播控件 */
.hero-dots{position:absolute;bottom:28px;left:50%;transform:translateX(-50%);display:flex;gap:8px;z-index:2}
.hero-dot{width:28px;height:4px;border-radius:2px;background:rgba(15,27,61,0.12);cursor:pointer;transition:all var(--base)}
.hero-dot.active{width:44px;background:var(--brand)}
.hero-arr{position:absolute;top:50%;transform:translateY(-50%);z-index:2;width:44px;height:44px;border-radius:50%;background:rgba(255,255,255,0.9);border:1px solid var(--border);display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:22px;color:var(--text-body);transition:all var(--fast);font-family:var(--font)}
.hero-arr:hover{background:#fff;color:var(--brand);box-shadow:var(--shadow-md);border-color:var(--brand)}
.hero-arr.l{left:28px}.hero-arr.r{right:28px}

/* ═══════════ 统计条 ═══════════ */
.trust-bar{background:#fff;border-bottom:1px solid var(--border)}
.trust-row{display:flex}
.trust-item{flex:1;text-align:center;padding:22px 16px;border-right:1px solid var(--border-light)}
.trust-item:last-child{border-right:none}
.trust-num{font-size:28px;font-weight:700;color:var(--text-h2);line-height:1.2}
.trust-num em{font-style:normal;color:var(--brand)}
.trust-lbl{font-size:11px;color:var(--text-muted);margin-top:4px;letter-spacing:0.04em;text-transform:uppercase}

/* ═══════════ 按钮 ═══════════ */
.btn{display:inline-flex;align-items:center;gap:6px;padding:10px 24px;font-size:14px;font-weight:600;border-radius:var(--r-sm);border:none;cursor:pointer;transition:all var(--fast);font-family:var(--font);white-space:nowrap}
.btn-brand{background:var(--brand);color:#fff;box-shadow:0 2px 8px rgba(37,99,235,0.25)}
.btn-brand:hover{background:var(--brand-dark);transform:translateY(-1px);box-shadow:0 4px 16px rgba(37,99,235,0.35)}
.btn-outline{background:transparent;border:1.5px solid var(--border);color:var(--text-body)}
.btn-outline:hover{border-color:var(--brand);color:var(--brand)}
.btn-lg{padding:13px 32px;font-size:15px}
.btn-white{background:#fff;color:var(--brand);box-shadow:var(--shadow-sm)}
.btn-white:hover{background:#f8fafc;box-shadow:var(--shadow-md)}

/* ═══════════ 标签 ═══════════ */
.tag{display:inline-block;padding:3px 12px;font-size:11px;font-weight:600;border-radius:100px;background:rgba(37,99,235,0.07);color:var(--brand)}
.tag-outline{border:1px solid var(--border);color:var(--text-muted);background:transparent}

/* ═══════════ 图标盒 ═══════════ */
.ib{width:44px;height:44px;display:flex;align-items:center;justify-content:center;border-radius:var(--r-sm);font-size:20px;flex-shrink:0;background:var(--bg-blue);color:var(--brand)}
.ib-lg{width:56px;height:56px;font-size:26px;border-radius:var(--r-md)}

/* ═══════════ 区块 ═══════════ */
.sec{padding:72px 0}
.sec-sm{padding:48px 0}
.sec-hd{text-align:center;margin-bottom:48px}
.sec-hd h2{font-size:28px;font-weight:700;color:var(--text-h2);letter-spacing:-0.02em;margin-bottom:12px}
.sec-hd p{font-size:15px;color:var(--text-muted);max-width:520px;margin:0 auto;line-height:1.6}

/* 对标百度的背景色 */
.bg-sky{background:var(--bg-sky)}
.bg-gray{background:var(--bg-gray)}
.bg-ice{background:var(--bg-ice)}
.bg-white{background:var(--bg-white)}
.bg-blue{background:var(--bg-blue)}

/* ═══════════ 卡片 ═══════════ */
.card{background:#fff;border-radius:var(--r-md);border:1px solid var(--border);transition:all var(--base)}
.card:hover{box-shadow:var(--shadow-md);border-color:#cdd6e8;transform:translateY(-1px)}
.card-pad{padding:24px}
.card-pad-lg{padding:32px 28px}

/* ═══════════ 网格 ═══════════ */
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.grid-5{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}

/* ═══════════ 特性网格（4列，对标百度） ═══════════ */
.feat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.feat-item{padding:28px 22px;text-align:center}
.feat-item .ib-lg{margin:0 auto 16px}
.feat-item h3{font-size:16px;font-weight:600;color:var(--text-h2);margin-bottom:8px}
.feat-item p{font-size:13px;color:var(--text-muted);line-height:1.6;margin-bottom:12px}
.feat-item .lmore{font-size:13px;font-weight:600;color:var(--brand)}

/* ═══════════ 大产品卡片（对标百度蓝色大区块） ═══════════ */
.prod-banner{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.prod-big{padding:36px 32px;display:flex;gap:22px;cursor:pointer;border:none;border-radius:var(--r-lg);transition:all var(--base)}
.prod-big:hover{box-shadow:var(--shadow-lg);transform:translateY(-2px)}
.prod-big.blue{background:linear-gradient(135deg,var(--bg-blue),#dce8f8);border:1px solid #d0dff0}
.prod-big .pbi{width:60px;height:60px;border-radius:var(--r-md);display:flex;align-items:center;justify-content:center;font-size:28px;flex-shrink:0}
.prod-big.blue .pbi{background:var(--brand);color:#fff}
.prod-big h3{font-size:20px;font-weight:700;color:var(--text-h2);margin-bottom:8px}
.prod-big p{font-size:13px;color:var(--text-muted);line-height:1.7;margin-bottom:14px}
.prod-big .pb-tags{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:14px}
.prod-big .pb-tags span{font-size:11px;padding:3px 10px;background:rgba(37,99,235,0.07);color:var(--brand);border-radius:4px;font-weight:500}
.prod-big .pblink{font-size:13px;font-weight:600;color:var(--brand)}

/* ═══════════ 新闻 ═══════════ */
.news-layout{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.news-card{overflow:hidden;cursor:pointer}
.news-card .nc-img{height:160px;background:linear-gradient(135deg,var(--bg-blue),#dce8f8);display:flex;align-items:center;justify-content:center;font-size:48px}
.news-card .nc-body{padding:20px}
.news-card .nc-body .nc-date{font-size:11px;color:var(--text-muted);margin-bottom:6px}
.news-card .nc-body h4{font-size:15px;font-weight:600;color:var(--text-h2);line-height:1.45;margin-bottom:8px}
.news-card .nc-body p{font-size:12px;color:var(--text-muted);line-height:1.6}
.news-list .nl-item{display:flex;align-items:center;justify-content:space-between;padding:13px 18px;border-bottom:1px solid var(--border-light);cursor:pointer;font-size:13px;transition:background var(--fast)}
.news-list .nl-item:last-child{border-bottom:none}
.news-list .nl-item:hover{background:rgba(37,99,235,0.03)}
.news-list .nl-item .nl-title{flex:1;font-weight:500;color:var(--text-body);margin-right:12px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.news-list .nl-item .nl-date{font-size:11px;color:var(--text-muted);flex-shrink:0}

/* ═══════════ 应用平台 ═══════════ */
.app-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.app-card{padding:32px 22px;text-align:center;cursor:pointer}
.app-card .ib-lg{margin:0 auto 14px}
.app-card h3{font-size:15px;font-weight:600;color:var(--text-h2);margin-bottom:6px}
.app-card p{font-size:12px;color:var(--text-muted);line-height:1.5;margin-bottom:10px}

/* ═══════════ CTA 横幅 ═══════════ */
.cta-strip{background:var(--bg-blue);border-radius:var(--r-lg);padding:36px 44px;display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;border:1px solid #d0dff0}
.cta-strip h3{font-size:20px;font-weight:700;color:var(--text-h2);margin-bottom:4px}
.cta-strip p{font-size:14px;color:var(--text-muted)}

/* ═══════════ Footer — 对标百度深色 ═══════════ */
.ftr{background:var(--footer);color:rgba(255,255,255,0.55);padding:52px 0 24px}
.ftr-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr 1fr;gap:40px;margin-bottom:36px}
.ftr h4{color:#fff;font-size:14px;font-weight:600;margin-bottom:14px}
.ftr li{margin-bottom:8px}
.ftr li a{font-size:12px;color:rgba(255,255,255,0.45);transition:color var(--fast)}
.ftr li a:hover{color:#fff}
.ftr-desc{font-size:12px;line-height:1.8;margin-top:8px}
.ftr .ftr-logo-img{height:24px;width:auto;display:block;flex-shrink:0}
/* 页脚品牌字 —— 正楷 + 亮青蓝（深底清晰） */
.ftr .ftr-logo-text{
  font-family:'KaiTi','楷体','STKaiti','华文楷体','SimKai',serif;
  font-size:18px;font-weight:700;line-height:1;font-style:normal;
  margin-left:8px;letter-spacing:1px;white-space:nowrap;
  color:#93c5fd;-webkit-font-smoothing:antialiased;
}
.ftr-bot{padding-top:20px;border-top:1px solid rgba(255,255,255,0.06);display:flex;justify-content:space-between;font-size:12px;color:rgba(255,255,255,0.6)}
/* 页脚版权行 —— 公司名 + 联系方式，居中排版 */
.ftr-bot.ftr-copy{flex-direction:column;align-items:center;gap:6px;text-align:center}
.ftr-bot.ftr-copy .ftr-brand{display:inline-flex;align-items:center;gap:10px;white-space:nowrap;flex-wrap:wrap;justify-content:center}
.ftr-bot.ftr-copy .ftr-brand .dot{color:rgba(255,255,255,0.22);font-size:4px}
.ftr-bot.ftr-copy .ftr-brand a{color:inherit;text-decoration:none;transition:color var(--fast)}
.ftr-bot.ftr-copy .ftr-brand a:hover{color:#93c5fd}
/* 页脚备案信息 —— 仿成熟网站：底部居中独立成行，避免拥挤 */
.ftr-bot.ftr-legal{flex-direction:column;align-items:center;gap:10px;text-align:center}
.ftr-legal .ftr-addr{line-height:1.8;color:rgba(255,255,255,0.5)}
.ftr-legal .beian-links{display:flex;align-items:center;gap:20px;flex-wrap:wrap;justify-content:center}
.ftr-legal .beian-links a{display:inline-flex;align-items:center;gap:6px;color:inherit;text-decoration:none;white-space:nowrap;transition:opacity var(--fast)}
.ftr-legal .beian-links a:hover{opacity:.8}
.ftr-legal .beian-links img{height:20px;width:auto;flex-shrink:0;vertical-align:middle}

/* ═══════════ 子页面头部 ═══════════ */
.page-hero{margin-top:64px;background:url('../images/bg_banner_light.jpg') center/cover no-repeat, linear-gradient(175deg,var(--hero-grad1),var(--hero-grad2));padding:48px 0 40px;border-bottom:1px solid var(--border)}
.page-hero h2{font-size:28px;font-weight:700;color:var(--text-h2)}
.page-hero p{font-size:14px;color:var(--text-muted);margin-top:6px}
.subnav{background:#fff;border-bottom:1px solid var(--border);position:sticky;top:64px;z-index:100}
.subnav-inner{display:flex;gap:0;overflow-x:auto}
.subnav-inner a{padding:13px 22px;font-size:13px;font-weight:500;color:var(--text-muted);border-bottom:2px solid transparent;transition:all var(--fast);white-space:nowrap;display:block}
.subnav-inner a:hover,.subnav-inner a.active{color:var(--brand);border-bottom-color:var(--brand)}

/* ═══════════ 智小瞳 ═══════════ */
.ai-btn{position:fixed;bottom:28px;right:28px;width:52px;height:52px;border-radius:50%;background:var(--brand);color:#fff;display:flex;align-items:center;justify-content:center;font-size:22px;cursor:pointer;z-index:999;box-shadow:0 4px 20px rgba(37,99,235,0.35);transition:all var(--base);border:none;animation:pulse 2.5s infinite}
@keyframes pulse{0%,100%{box-shadow:0 0 0 0 rgba(37,99,235,0.4)}50%{box-shadow:0 0 0 14px rgba(37,99,235,0)}}
.ai-btn:hover{transform:scale(1.08);animation:none}
.ai-panel{position:fixed;bottom:92px;right:28px;width:370px;height:480px;background:#fff;border-radius:var(--r-lg);box-shadow:0 16px 48px rgba(15,27,61,0.15);z-index:998;display:none;flex-direction:column;overflow:hidden;border:1px solid var(--border)}
.ai-panel.open{display:flex}
.ai-panel-hd{padding:14px 18px;background:var(--brand);color:#fff;display:flex;align-items:center;justify-content:space-between;font-size:14px;font-weight:600}
.ai-panel-hd button{background:rgba(255,255,255,0.2);border:none;color:#fff;width:24px;height:24px;border-radius:50%;cursor:pointer;font-size:14px;display:flex;align-items:center;justify-content:center;line-height:1}
.ai-panel-bd{flex:1;padding:16px;overflow-y:auto;background:var(--bg-gray)}
.ai-panel-ft{padding:10px 14px;border-top:1px solid var(--border);display:flex;gap:8px;background:#fff}
.ai-panel-ft input{flex:1;padding:8px 12px;border:1px solid var(--border);border-radius:var(--r-sm);font-size:13px;outline:none;font-family:var(--font)}
.ai-panel-ft input:focus{border-color:var(--brand)}
.ai-panel-ft button{padding:8px 16px;background:var(--brand);color:#fff;border:none;border-radius:var(--r-sm);cursor:pointer;font-size:13px;font-weight:600}

/* ═══════════ 响应式 ═══════════ */
@media(max-width:1100px){
  body{min-width:auto}
  .hero-inner{flex-direction:column;gap:40px}
  .hero-visual{flex:0 0 auto;width:100%;max-width:440px}
  .hero-text h1{font-size:36px}
  .hero-text{max-width:100%}
  .feat-grid,.app-grid{grid-template-columns:repeat(2,1fr)}
  .prod-banner,.news-layout{grid-template-columns:1fr}
  .ftr-grid{grid-template-columns:repeat(3,1fr)}
}
@media(max-width:768px){
  .feat-grid,.app-grid,.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .ftr-grid{grid-template-columns:1fr 1fr}
  .nav nav{display:none}
  .hero{min-height:400px}
  .hero-text h1{font-size:28px}
  .ai-panel{width:calc(100vw - 32px);right:16px;bottom:84px;height:420px}
  .trust-row{flex-wrap:wrap}
  .trust-item{flex:0 0 33.333%}
}

/* ═══ 导航栏下拉菜单（共用） ═══ */
.nav-dropdown{position:relative;display:inline-flex}
.nav-dropdown-trigger{display:flex;align-items:center;gap:4px;cursor:pointer;padding:8px 14px;font-size:13px;font-weight:500;color:var(--nav-text);border-radius:6px;white-space:nowrap;transition:all 0.15s;text-decoration:none;user-select:none}
.nav-dropdown-trigger:hover,.nav-dropdown:hover>.nav-dropdown-trigger{color:var(--brand);background:var(--brand-5)}
.nav-dropdown-trigger .dd-arrow{font-size:10px;transition:transform 0.15s;margin-left:2px}
.nav-dropdown:hover>.nav-dropdown-trigger .dd-arrow{transform:rotate(180deg)}
.nav-dropdown-menu{position:absolute;top:100%;left:0;background:#fff;border:1px solid var(--border);border-radius:8px;box-shadow:0 8px 24px rgba(0,0,0,0.12);min-width:200px;padding:6px 0;opacity:0;visibility:hidden;transform:translateY(-4px);transition:all 0.2s;z-index:1000;list-style:none;margin:0}
.nav-dropdown:hover>.nav-dropdown-menu{opacity:1;visibility:visible;transform:translateY(0)}
.nav .nav-dropdown-menu a{display:flex;align-items:center;padding:10px 16px;font-size:13px;color:var(--text-body);text-decoration:none;white-space:nowrap;transition:all 0.15s;cursor:pointer}
.nav .nav-dropdown-menu a:hover{background:var(--brand-5);color:var(--brand)}
.nav .nav-dropdown-menu a .dev-badge{font-size:11px;color:var(--text-muted);margin-left:6px;white-space:nowrap}