/* =====================================================================
   AI泰州 · AI Taizhou  —  设计视觉系统 (Tech-Art / 科技艺术风)
   设计专家：蓝艺渲 (HoyooAI)  |  纯 CSS 自定义属性 + 原生实现
   ===================================================================== */

/* ---------- 1. 设计令牌 (Design Tokens) ---------- */
:root{
  --cyan:#00FFE0;          /* 霓虹青 */
  --blue:#5B9BFF;          /* 电光蓝 */
  --bg-dark:#0a0e1a;       /* 主背景 */
  --bg-2:#0d1424;
  --bg-3:#111c33;
  --panel:rgba(255,255,255,.045);
  --panel-2:rgba(13,20,36,.72);
  --panel-border:rgba(0,255,224,.16);
  --panel-border-strong:rgba(91,155,255,.42);
  --text:#e9eff8;
  --text-dim:#a3b4cf;
  --text-mute:#6e80a0;
  --grad:linear-gradient(135deg,#00FFE0 0%,#5B9BFF 100%);
  --grad-soft:linear-gradient(135deg,rgba(0,255,224,.16),rgba(91,155,255,.16));
  --glow-cyan:0 0 24px rgba(0,255,224,.35);
  --glow-blue:0 0 28px rgba(91,155,255,.40);
  --radius:16px;
  --radius-sm:10px;
  --shadow:0 18px 48px rgba(0,0,0,.45);
  --nav-h:74px;
  --maxw:1240px;
  --font-zh:"Noto Sans SC","PingFang SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;
  --font-en:"Orbitron","Rajdhani","Noto Sans SC",sans-serif;
  /* 模块色系驱动变量：默认随品牌青蓝；body.theme-* 覆盖后全局光带与标题底图同步变色 */
  --accent:var(--cyan);
  --accent-2:var(--blue);
}

/* ---------- 1.5 模块色系 (Module Color Schemes) ----------
   每个子模块一套独立色系：覆盖 --cyan/--blue/--grad/辉光/描边等，
   使导航、卡片、按钮、标题文字与全局光带均随模块整体变色；
   --accent / --accent-2 同时驱动标题区「同色系动态 SVG 底图」。 */
body.theme-home{--cyan:#00FFE0;--blue:#5B9BFF;--accent:#00FFE0;--accent-2:#5B9BFF;
  --grad:linear-gradient(135deg,#00FFE0 0%,#5B9BFF 100%);
  --grad-soft:linear-gradient(135deg,rgba(0,255,224,.16),rgba(91,155,255,.16));
  --glow-cyan:0 0 24px rgba(0,255,224,.35);--glow-blue:0 0 28px rgba(91,155,255,.40);
  --panel-border:rgba(0,255,224,.16);--panel-border-strong:rgba(91,155,255,.42)}
body.theme-activities{--cyan:#FF8A5B;--blue:#FF5E9C;--accent:#FF8A5B;--accent-2:#FF5E9C;
  --grad:linear-gradient(135deg,#FF8A5B 0%,#FF5E9C 100%);
  --grad-soft:linear-gradient(135deg,rgba(255,138,91,.16),rgba(255,94,156,.16));
  --glow-cyan:0 0 24px rgba(255,138,91,.35);--glow-blue:0 0 28px rgba(255,94,156,.40);
  --panel-border:rgba(255,138,91,.16);--panel-border-strong:rgba(255,94,156,.42)}
body.theme-info{--cyan:#A978FF;--blue:#6AA8FF;--accent:#A978FF;--accent-2:#6AA8FF;
  --grad:linear-gradient(135deg,#A978FF 0%,#6AA8FF 100%);
  --grad-soft:linear-gradient(135deg,rgba(169,120,255,.16),rgba(106,168,255,.16));
  --glow-cyan:0 0 24px rgba(169,120,255,.35);--glow-blue:0 0 28px rgba(106,168,255,.40);
  --panel-border:rgba(169,120,255,.16);--panel-border-strong:rgba(106,168,255,.42)}
body.theme-bbs{--cyan:#2EE6A6;--blue:#2BC8D4;--accent:#2EE6A6;--accent-2:#2BC8D4;
  --grad:linear-gradient(135deg,#2EE6A6 0%,#2BC8D4 100%);
  --grad-soft:linear-gradient(135deg,rgba(46,230,166,.16),rgba(43,200,212,.16));
  --glow-cyan:0 0 24px rgba(46,230,166,.35);--glow-blue:0 0 28px rgba(43,200,212,.40);
  --panel-border:rgba(46,230,166,.16);--panel-border-strong:rgba(43,200,212,.42)}
body.theme-service{--cyan:#FFC24D;--blue:#FF9A4D;--accent:#FFC24D;--accent-2:#FF9A4D;
  --grad:linear-gradient(135deg,#FFC24D 0%,#FF9A4D 100%);
  --grad-soft:linear-gradient(135deg,rgba(255,194,77,.16),rgba(255,154,77,.16));
  --glow-cyan:0 0 24px rgba(255,194,77,.35);--glow-blue:0 0 28px rgba(255,154,77,.40);
  --panel-border:rgba(255,194,77,.18);--panel-border-strong:rgba(255,154,77,.45)}
body.theme-account{--cyan:#FF6F9C;--blue:#C86BFF;--accent:#FF6F9C;--accent-2:#C86BFF;
  --grad:linear-gradient(135deg,#FF6F9C 0%,#C86BFF 100%);
  --grad-soft:linear-gradient(135deg,rgba(255,111,156,.16),rgba(200,107,255,.16));
  --glow-cyan:0 0 24px rgba(255,111,156,.35);--glow-blue:0 0 28px rgba(200,107,255,.40);
  --panel-border:rgba(255,111,156,.16);--panel-border-strong:rgba(200,107,255,.42)}

/* ---------- 2. 重置与基础 ---------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-zh);
  background:var(--bg-dark);
  color:var(--text);
  line-height:1.7;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none;transition:color .25s}
img{display:block;max-width:100%}
ul{list-style:none}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
::selection{background:rgba(0,255,224,.30);color:#fff}

/* 滚动条 */
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:#070b14}
::-webkit-scrollbar-thumb{background:linear-gradient(var(--cyan),var(--blue));border-radius:10px}

/* ---------- 3. 签名级 SVG 背景 (4 层动态光带) ---------- */
#bg-lightband{
  position:fixed;
  inset:0;
  width:100%;
  height:100%;
  z-index:0;
  pointer-events:none;
  opacity:.9;
}
.bg-vignette{
  position:fixed;inset:0;z-index:0;pointer-events:none;
  background:
    radial-gradient(120% 80% at 50% -10%,rgba(91,155,255,.10),transparent 60%),
    radial-gradient(100% 70% at 100% 100%,rgba(0,255,224,.07),transparent 55%),
    linear-gradient(180deg,#070b14 0%,var(--bg-dark) 40%,#070b14 100%);
}
/* 动画：光带漂移 / 节点脉冲 / 网格呼吸 */
.lb-band{animation:drift 16s ease-in-out infinite alternate}
.lb-band-2{animation:drift 20s ease-in-out infinite alternate-reverse}
.lb-dot{animation:pulse 5s ease-in-out infinite}
.lb-node{animation:nodepulse 3.6s ease-in-out infinite}
.lb-grid{animation:gridbreathe 9s ease-in-out infinite alternate}
@keyframes drift{from{transform:translate3d(-14px,8px,0)}to{transform:translate3d(18px,-10px,0)}}
@keyframes pulse{0%,100%{opacity:.55}50%{opacity:.95}}
@keyframes nodepulse{0%,100%{opacity:.7;filter:drop-shadow(0 0 4px var(--cyan))}50%{opacity:1;filter:drop-shadow(0 0 14px var(--cyan))}}
@keyframes gridbreathe{from{opacity:.06}to{opacity:.12}}

/* ---------- 4. 布局容器 ---------- */
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px;position:relative;z-index:2}
.section{padding:96px 0;position:relative;z-index:2}
.section-sm{padding:64px 0}
.eyebrow{
  font-family:var(--font-en);
  letter-spacing:.32em;
  font-size:12px;
  text-transform:uppercase;
  color:var(--cyan);
  display:inline-flex;align-items:center;gap:10px;
  margin-bottom:14px;
}
.eyebrow::before{content:"";width:30px;height:1px;background:var(--grad)}
.section-title{
  font-size:clamp(26px,3.4vw,40px);
  font-weight:800;line-height:1.25;letter-spacing:.5px;
  margin-bottom:14px;
}
.section-title .accent{
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.section-lead{color:var(--text-dim);max-width:640px;margin-bottom:40px;font-size:15.5px}

/* ---------- 5. 顶栏导航 (悬浮交互式) ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:50;
  height:var(--nav-h);
  display:flex;align-items:center;
  transition:background .35s,backdrop-filter .35s,box-shadow .35s,border-color .35s;
  border-bottom:1px solid transparent;
}
.site-header::after{ /* 光标跟随聚光 */
  content:"";position:absolute;inset:0;pointer-events:none;z-index:-1;
  background:radial-gradient(220px 220px at var(--mx,50%) var(--my,50%),rgba(0,255,224,.10),transparent 70%);
  opacity:0;transition:opacity .3s;
}
.site-header.spotlight::after{opacity:1}
.site-header.scrolled{
  background:rgba(8,12,22,.82);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--panel-border);
  box-shadow:0 10px 30px rgba(0,0,0,.4);
}
.nav-inner{
  width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px;
  display:flex;align-items:center;justify-content:space-between;gap:24px;
}
.brand{display:flex;align-items:center;gap:12px}
.brand-logo{height:50px;min-height:50px;width:auto;filter:drop-shadow(0 0 10px rgba(0,255,224,.25))}
.brand-text{display:flex;flex-direction:column;line-height:1.1}
.brand-text b{font-family:var(--font-en);font-size:18px;letter-spacing:2px}
.brand-text span{font-size:11px;color:var(--text-mute);letter-spacing:3px}

.main-nav{display:flex;align-items:center}
.main-nav>ul{
  display:flex;align-items:center;gap:4px;
  padding:6px;border-radius:16px;
  background:linear-gradient(135deg,rgba(10,14,26,.65),rgba(20,30,52,.65));
  backdrop-filter:blur(14px);
  border:1px solid rgba(255,255,255,.10);
  box-shadow:0 10px 32px rgba(0,0,0,.35);
}
.main-nav>ul>li{position:relative}
.main-nav>ul>li>a{
  display:inline-flex;align-items:center;gap:6px;
  padding:10px 16px;border-radius:12px;font-size:15px;font-weight:600;
  color:var(--text);position:relative;transition:.25s;
}
.main-nav>ul>li>a .caret{width:8px;height:8px;border-right:2px solid currentColor;border-bottom:2px solid currentColor;transform:rotate(45deg) translateY(-2px);opacity:.6;transition:.25s}
.main-nav>ul>li:hover>a,.main-nav>ul>li>a.active{color:#fff}
.main-nav>ul>li:hover>a,.main-nav>ul>li>a.active{background:var(--grad-soft);box-shadow:inset 0 0 0 1px var(--panel-border)}
.main-nav>ul>li:hover>a .caret{transform:rotate(-135deg) translateY(-2px);opacity:1}

/* 二级菜单：动态展开 */
.submenu{
  position:absolute;top:calc(100% + 10px);left:50%;
  transform:translateX(-50%) translateY(10px);
  min-width:180px;padding:8px;
  background:var(--panel-2);
  backdrop-filter:blur(16px);
  border:1px solid var(--panel-border);
  border-radius:14px;
  box-shadow:var(--shadow);
  opacity:0;visibility:hidden;
  transition:opacity .28s ease,transform .28s ease,visibility .28s;
}
.submenu::before{content:"";position:absolute;top:-7px;left:50%;transform:translateX(-50%) rotate(45deg);width:12px;height:12px;background:var(--panel-2);border-left:1px solid var(--panel-border);border-top:1px solid var(--panel-border)}
.submenu li a{
  display:block;padding:10px 14px;border-radius:9px;font-size:14px;color:var(--text-dim);
  transition:.2s;white-space:nowrap;
}
.submenu li a:hover{background:var(--grad-soft);color:#fff;padding-left:18px}
.has-sub:hover .submenu{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}

.nav-cta{
  padding:10px 20px;border-radius:30px;font-weight:700;font-size:14px;
  background:var(--grad);color:#04101a;
  box-shadow:var(--glow-cyan);transition:.25s;
}
.nav-cta:hover{transform:translateY(-2px);box-shadow:0 0 32px rgba(0,255,224,.6)}

.nav-toggle{display:none;width:42px;height:42px;border-radius:10px;border:1px solid var(--panel-border);position:relative}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:11px;width:20px;height:2px;background:var(--text);border-radius:2px;transition:.3s}
.nav-toggle span{top:20px}
.nav-toggle span::before{top:-7px}.nav-toggle span::after{top:7px}

/* 顶栏会员区（登录态 / 访客态） */
.nav-member{display:flex;align-items:center;gap:12px;font-size:13.5px}
.nav-member .nav-user{color:var(--text);white-space:nowrap;font-weight:600}
.nav-member .nav-link{color:var(--text-dim);padding:8px 12px;border-radius:9px;transition:.2s;white-space:nowrap}
.nav-member .nav-link:hover{color:#fff;background:var(--grad-soft);box-shadow:inset 0 0 0 1px var(--panel-border)}

/* 版块卡片内的「发帖」快捷入口 */
.board-post{margin-left:auto;color:var(--cyan);font-weight:700;font-size:13px;white-space:nowrap;padding:5px 12px;border-radius:8px;border:1px solid var(--panel-border);transition:.2s}
.board-post:hover{background:var(--grad-soft);box-shadow:inset 0 0 0 1px var(--cyan)}

/* ---------- 6. 首页 Hero 全屏轮播 ---------- */
.hero{position:relative;height:100vh;min-height:680px;width:100%;overflow:hidden;z-index:1;display:flex;align-items:center;justify-content:center}
.slides{position:absolute;inset:0}
.slide{
  position:absolute;inset:0;opacity:0;
  background-size:cover;background-position:center;
  transform:scale(1.06);
  transition:opacity 1.1s ease,transform 7s ease;
}
.slide.active{opacity:1;transform:scale(1)}
/* 渐变遮罩：从底部向上拉暗化 */
.slide::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(to top,
     rgba(7,11,20,.92) 0%,
     rgba(7,11,20,.70) 25%,
     rgba(7,11,20,.35) 55%,
     rgba(7,11,20,.10) 80%,
     rgba(7,11,20,.03) 100%);
}
.hero-overlay{position:absolute;inset:0;background:radial-gradient(70% 55% at 50% 60%,rgba(91,155,255,.10),transparent 60%)}

/* 标题区下方 · 三条连续半透明曲线：SMIL 形变做有机起伏（每波方向/振幅随机），整体轻微上下呼吸 */
.hero-waves{position:absolute;left:0;bottom:4vh;width:100%;height:36vh;z-index:2;pointer-events:none;overflow:hidden}
.hero-wave-svg{position:absolute;inset:0;width:100%;height:100%;display:block;overflow:visible}
.hero-wave-svg .wave{fill:none;stroke:url(#waveGrad);stroke-linecap:round;stroke-linejoin:round;transform-box:fill-box;transform-origin:center;animation:waveBob 8s ease-in-out infinite}
/* 整体有韵律的上下波动（三条同节奏）；每条线的逐波随机起伏由 SVG <animate> 的 d 形变负责 */
@keyframes waveBob{0%,100%{transform:translateY(0)}50%{transform:translateY(-9px)}}

.slide-caption{
  position:relative;z-index:3;width:100%;
  padding:0 24px 0 100px;text-align:left;
}
.slide-caption .container{
  display:flex;flex-direction:column;align-items:flex-start;gap:18px;
  max-width:880px;margin:0;
}
.slide-tag{
  font-family:var(--font-en);letter-spacing:.2em;font-size:11px;color:#fff;
  padding:7px 18px;border:1px solid rgba(255,255,255,.25);border-radius:30px;
  background:rgba(10,14,26,.45);backdrop-filter:blur(8px);
}
.slide-title{
  font-size:clamp(36px,5.2vw,72px);font-weight:900;line-height:1.05;letter-spacing:2px;
  text-shadow:0 8px 48px rgba(0,0,0,.65);white-space:nowrap;
}
.slide-title .accent{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.slide-sub{font-size:clamp(15px,1.6vw,20px);color:#e8eef8;max-width:52ch;text-shadow:0 2px 16px rgba(0,0,0,.7);line-height:1.7}
.slide-actions{display:flex;gap:16px;flex-wrap:wrap;margin-top:10px;justify-content:flex-start}

/* 轮播控件 */
.hero-controls{position:absolute;z-index:4;bottom:5vh;right:0;width:100%}
.hero-controls .container{display:flex;align-items:center;justify-content:center}
.dots{display:flex;gap:10px}
.dot{width:34px;height:5px;border-radius:5px;background:rgba(255,255,255,.25);transition:.3s;overflow:hidden;position:relative}
.dot::after{content:"";position:absolute;inset:0;width:0;background:var(--grad);border-radius:5px}
.dot.active{background:rgba(255,255,255,.35)}
.dot.active::after{width:100%;animation:fill 6s linear forwards}
@keyframes fill{from{width:0}to{width:100%}}
.arrows{position:absolute;top:50%;left:0;transform:translateY(-50%);width:100%;padding:0 24px;pointer-events:none;display:flex;justify-content:space-between;z-index:5}
.arrow{width:52px;height:52px;border-radius:50%;border:1px solid rgba(255,255,255,.22);background:rgba(10,14,26,.45);backdrop-filter:blur(10px);display:grid;place-items:center;transition:.25s;color:var(--text);pointer-events:auto}
.arrow:hover{background:var(--grad);color:#04101a;box-shadow:var(--glow-cyan);transform:translateY(-2px)}
.arrow svg{width:20px;height:20px}

.scroll-hint{position:absolute;left:50%;bottom:18px;transform:translateX(-50%);z-index:4;color:var(--text-mute);font-size:11px;letter-spacing:3px;display:flex;flex-direction:column;align-items:center;gap:8px;animation:bob 2.4s ease-in-out infinite}
.scroll-hint .mouse{width:22px;height:36px;border:2px solid var(--text-mute);border-radius:14px;position:relative}
.scroll-hint .mouse::after{content:"";position:absolute;top:6px;left:50%;transform:translateX(-50%);width:4px;height:7px;border-radius:3px;background:var(--cyan);animation:wheel 1.8s infinite}
@keyframes wheel{0%{opacity:0;transform:translate(-50%,0)}30%{opacity:1}100%{opacity:0;transform:translate(-50%,12px)}}
@keyframes bob{0%,100%{transform:translateX(-50%) translateY(0)}50%{transform:translateX(-50%) translateY(6px)}}

/* ---------- 7. 按钮 / 标签 ---------- */
.btn{display:inline-flex;align-items:center;gap:9px;padding:13px 26px;border-radius:30px;font-weight:700;font-size:15px;transition:.28s;line-height:1}
.btn-primary{background:var(--grad);color:#04101a;box-shadow:var(--glow-cyan)}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 0 34px rgba(0,255,224,.6)}
.btn-ghost{border:1px solid var(--panel-border-strong);color:var(--text);background:rgba(255,255,255,.03)}
.btn-ghost:hover{border-color:var(--cyan);color:#fff;box-shadow:var(--glow-cyan);transform:translateY(-3px)}
.btn-red{
  background:linear-gradient(135deg,#C41E3A,#e63950);color:#fff;
  box-shadow:0 8px 28px rgba(196,30,58,.45);
}
.btn-red:hover{transform:translateY(-3px);box-shadow:0 12px 36px rgba(196,30,58,.55)}
.btn-ghost-light{
  border:1px solid rgba(255,255,255,.35);color:#fff;
  background:rgba(255,255,255,.06);backdrop-filter:blur(8px);
}
.btn-ghost-light:hover{border-color:#fff;background:rgba(255,255,255,.12);transform:translateY(-3px)}
.tag{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:700;padding:5px 12px;border-radius:30px;color:var(--cyan);background:rgba(0,255,224,.08);border:1px solid var(--panel-border)}
.tag.blue{color:var(--blue);background:rgba(91,155,255,.10);border-color:var(--panel-border-strong)}
.badge-hot{position:absolute;top:14px;left:14px;z-index:3;font-size:11px;font-weight:800;letter-spacing:1px;padding:5px 11px;border-radius:8px;background:linear-gradient(135deg,#ff5a7a,#ff9a5a);color:#fff;box-shadow:0 6px 18px rgba(255,90,122,.4)}

/* ---------- 8. 卡片网格 (响应式 4/2/1) ---------- */
.card-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.card{
  position:relative;background:var(--panel);border:1px solid var(--panel-border);
  border-radius:var(--radius);padding:24px;overflow:hidden;
  backdrop-filter:blur(10px);transition:transform .35s,box-shadow .35s,border-color .35s;
}
.card::before{content:"";position:absolute;inset:0;background:var(--grad-soft);opacity:0;transition:.35s}
.card:hover{transform:translateY(-8px);border-color:var(--panel-border-strong);box-shadow:var(--glow-blue)}
.card:hover::before{opacity:1}
.card>*{position:relative;z-index:1}
.card .ic{width:50px;height:50px;border-radius:13px;display:grid;place-items:center;background:var(--grad-soft);border:1px solid var(--panel-border);margin-bottom:16px}
.card .ic svg{width:24px;height:24px;color:var(--cyan)}
.card h3{font-size:18px;margin-bottom:8px;font-weight:700}
.card p{font-size:14px;color:var(--text-dim)}
.card .meta{display:flex;gap:14px;margin-top:16px;font-size:12.5px;color:var(--text-mute);flex-wrap:wrap}
.card .meta span{display:inline-flex;align-items:center;gap:5px}

/* 图文卡 (news) */
.post-card{display:flex;flex-direction:column;padding:0}
.post-card .thumb{height:180px;background-size:cover;background-position:center;position:relative}
.post-card .thumb::after{content:"";position:absolute;inset:0;background:linear-gradient(to top,rgba(10,14,26,.6),transparent 60%)}
.post-card .body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
.post-card .body h3{font-size:17px;line-height:1.4}
.post-card .body p{font-size:13.5px;color:var(--text-dim);flex:1}
.post-card .foot{display:flex;justify-content:space-between;align-items:center;font-size:12.5px;color:var(--text-mute);border-top:1px solid var(--panel-border);padding-top:14px;margin-top:6px}

/* ---------- 9. 统计带 ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.stat{padding:30px 24px;border-radius:var(--radius);background:var(--panel);border:1px solid var(--panel-border);text-align:center;position:relative;overflow:hidden}
.stat::after{content:"";position:absolute;top:-40%;right:-30%;width:160px;height:160px;background:radial-gradient(circle,var(--grad-soft),transparent 70%);opacity:.6}
.stat .num{font-family:var(--font-en);font-size:40px;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1}
.stat .label{margin-top:10px;color:var(--text-dim);font-size:14px}

/* ---------- 10. 孵化流程 (紧凑四列) ---------- */
.loop-header{text-align:center}
.loop-header .eyebrow{
  justify-content:center;gap:8px;
  padding:8px 18px;border:1px solid var(--panel-border);border-radius:30px;
  background:rgba(10,14,26,.4);backdrop-filter:blur(6px);
  font-size:12px;letter-spacing:.12em;margin-bottom:18px;
}
.loop-header .eyebrow::before{display:none}
.loop-header .section-title{margin-bottom:10px}
.loop-header .section-lead{margin:0 auto 42px}

.loop{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;align-items:stretch}
.loop-step{
  position:relative;background:var(--panel);border:1px solid var(--panel-border);border-radius:var(--radius);
  padding:28px 20px 24px;text-align:center;transition:.3s;overflow:hidden;
}
.loop-step:hover{transform:translateY(-6px);border-color:var(--panel-border-strong);box-shadow:var(--glow-blue)}
.loop-step .step-no{
  font-family:var(--font-en);font-size:42px;font-weight:800;line-height:1;
  color:var(--cyan);opacity:.18;position:absolute;top:12px;right:16px;letter-spacing:0;user-select:none;
}
.loop-step .step-ic{
  width:50px;height:50px;margin:6px auto 16px;border-radius:14px;display:grid;place-items:center;
  background:var(--grad-soft);border:1px solid var(--panel-border);color:var(--cyan);
}
.loop-step .step-ic svg{width:24px;height:24px}
.loop-step h4{font-size:17px;font-weight:700;margin-bottom:10px}
.loop-step p{font-size:13.5px;color:var(--text-dim);line-height:1.7}

/* ---------- 11. 文章正文 (≤90% 宽) ---------- */
.article-body{max-width:90%;margin:0 auto}
.article-body p{margin:0 0 18px;color:var(--text-dim);font-size:15.5px}
.article-body h2,.article-body h3{margin:28px 0 14px;color:#fff}
.article-body blockquote{margin:20px 0;padding:14px 20px;border-left:3px solid var(--cyan);background:var(--panel);border-radius:0 10px 10px 0;color:var(--text);font-style:italic}
.article-head{margin-bottom:28px}
.article-head .title{font-size:clamp(24px,3vw,34px);font-weight:800;line-height:1.3;margin:12px 0}
.article-head .info{display:flex;gap:18px;flex-wrap:wrap;color:var(--text-mute);font-size:13px}

/* page-hero (子页顶部) */
.page-hero{position:relative;padding:calc(var(--nav-h) + 80px) 0 70px;overflow:hidden;z-index:1}
.page-hero .eyebrow{margin-bottom:10px}
.page-hero h1{font-size:clamp(32px,5vw,58px);font-weight:900;line-height:1.1;letter-spacing:1px}
.page-hero h1 .accent{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.page-hero p{margin-top:14px;color:var(--text-dim);max-width:620px;font-size:16px}
.breadcrumb{display:flex;gap:10px;align-items:center;font-size:13px;color:var(--text-mute);margin-bottom:18px}
.breadcrumb a:hover{color:var(--cyan)}
.breadcrumb .sep{opacity:.5}

/* ---------- 11.5 标题区同色系动态透明 SVG 底图 ---------- */
.hero-anim-svg{position:absolute;inset:0;width:100%;height:100%;z-index:0;pointer-events:none}
.page-hero{background:linear-gradient(180deg,rgba(10,14,26,.15),rgba(7,11,20,.55))}
.page-hero::before{content:"";position:absolute;inset:0;z-index:1;pointer-events:none;
  background:radial-gradient(130% 110% at 82% 0%,transparent 42%,rgba(7,11,20,.6) 100%)}
.page-hero .container{position:relative;z-index:2}
.page-hero .hero-anim-svg{opacity:.55}
/* 首页全屏轮播中的同色系底图（压在图片之上、标题之下） */
.hero .hero-anim-svg{z-index:1;opacity:.42}
/* 元素动效 */
.ha-ring{transform-box:fill-box;transform-origin:center;animation:ha-spin 40s linear infinite}
.ha-ring-2{transform-box:fill-box;transform-origin:center;animation:ha-spin 28s linear infinite reverse}
.ha-ring-3{transform-box:fill-box;transform-origin:center;animation:ha-spin 54s linear infinite}
.ha-band{animation:ha-drift 18s ease-in-out infinite alternate}
.ha-band-2{animation:ha-drift 23s ease-in-out infinite alternate-reverse}
.ha-orb{transform-box:fill-box;transform-origin:center;animation:ha-pulse 6.5s ease-in-out infinite}
.ha-orb-2{transform-box:fill-box;transform-origin:center;animation:ha-pulse 8s ease-in-out infinite reverse}
.ha-dot{animation:ha-float 9s linear infinite}
@keyframes ha-spin{to{transform:rotate(360deg)}}
@keyframes ha-drift{from{transform:translate3d(-16px,10px,0)}to{transform:translate3d(20px,-12px,0)}}
@keyframes ha-pulse{0%,100%{opacity:.45;transform:scale(.92)}50%{opacity:.95;transform:scale(1.06)}}
@keyframes ha-float{0%{transform:translateY(14px);opacity:0}15%{opacity:.9}85%{opacity:.9}100%{transform:translateY(-26px);opacity:0}}
/* 尊重「减少动态效果」无障碍偏好 */
@media (prefers-reduced-motion: reduce){
  .ha-ring,.ha-ring-2,.ha-ring-3,.ha-band,.ha-band-2,.ha-orb,.ha-orb-2,.ha-dot,
  .lb-band,.lb-band-2,.lb-dot,.lb-node,.lb-grid,
  .hr-ribbon,.hr-node,.hero-wave-svg .wave{animation:none!important}
}

/* ---------- 首页双贝塞尔蜿蜒光带 ---------- */
.home-ribbon{position:absolute;inset:0;width:100%;height:100%;z-index:1;pointer-events:none;opacity:.50}
.hero .home-ribbon{opacity:.58}
.hr-ribbon{stroke-dasharray:18 42;stroke-dashoffset:0;animation:hr-flow 5s linear infinite}
.hr-ribbon-b{animation-duration:6.5s;animation-direction:reverse;stroke-dasharray:28 56}
.hr-ribbon-c{animation-duration:7s;stroke-dasharray:10 34}
.hr-ribbon-d{animation-duration:8.5s;animation-direction:reverse;stroke-dasharray:14 48}
.hr-node{animation:hr-node-drift 12s ease-in-out infinite}
.hr-node:nth-child(2){animation-delay:2.5s}
.hr-node:nth-child(3){animation-delay:5s}
.hr-node:nth-child(4){animation-delay:7.5s}
.hr-node:nth-child(5){animation-delay:10s}
@keyframes hr-flow{to{stroke-dashoffset:-240}}
@keyframes hr-node-drift{0%,100%{transform:translate3d(0,0,0);opacity:.6}50%{transform:translate3d(18px,-14px,0);opacity:1}}

/* 子页区块卡 */
.subcard{background:var(--panel);border:1px solid var(--panel-border);border-radius:var(--radius);padding:28px;backdrop-filter:blur(10px);height:100%}
.subcard h3{font-size:19px;margin-bottom:6px;display:flex;align-items:center;gap:10px}
.subcard h3 .dotmark{width:9px;height:9px;border-radius:50%;background:var(--cyan);box-shadow:var(--glow-cyan)}
.subcard p{color:var(--text-dim);font-size:14.5px;margin-top:8px}
.subcard .list{margin-top:14px;display:flex;flex-direction:column;gap:10px}
.subcard .list li{display:flex;gap:10px;font-size:14px;color:var(--text-dim);padding-bottom:10px;border-bottom:1px dashed rgba(255,255,255,.07)}
.subcard .list li::before{content:"▹";color:var(--cyan)}

/* ---------- 12. 凤城论道 BBS ---------- */
.board-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.board{
  display:flex;gap:18px;padding:22px;background:var(--panel);border:1px solid var(--panel-border);
  border-radius:var(--radius);transition:.3s;position:relative;overflow:hidden;
}
.board:hover{transform:translateY(-5px);border-color:var(--panel-border-strong);box-shadow:var(--glow-blue)}
.board .b-ic{width:58px;height:58px;flex:0 0 58px;border-radius:14px;display:grid;place-items:center;background:var(--grad-soft);border:1px solid var(--panel-border);color:var(--cyan);font-family:var(--font-en);font-weight:800;font-size:20px}
.board .b-main{flex:1;min-width:0}
.board .b-main h3{font-size:18px;margin-bottom:4px}
.board .b-main p{font-size:13.5px;color:var(--text-dim);margin-bottom:12px}
.board .b-meta{display:flex;flex-wrap:wrap;gap:10px 18px;font-size:12.5px;color:var(--text-mute)}
.board .b-meta b{color:var(--cyan);font-weight:700}
.moderator{display:inline-flex;align-items:center;gap:7px}
.moderator .avatar{width:24px;height:24px;border-radius:50%;background:var(--grad);display:grid;place-items:center;color:#04101a;font-size:11px;font-weight:800}
.topic-row{display:flex;align-items:center;gap:14px;padding:14px 18px;border-radius:12px;background:var(--panel);border:1px solid var(--panel-border);margin-bottom:12px;transition:.25s}
.topic-row:hover{border-color:var(--panel-border-strong);background:rgba(255,255,255,.05)}
.topic-row .t-av{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,#1b2942,#2a3f63);display:grid;place-items:center;color:var(--cyan);font-weight:800;flex:0 0 40px}
.topic-row .t-main{flex:1;min-width:0}
.topic-row .t-main h4{font-size:15.5px;margin-bottom:3px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.topic-row .t-main .t-sub{font-size:12.5px;color:var(--text-mute)}
.topic-row .t-stats{display:flex;gap:18px;font-size:12.5px;color:var(--text-mute);text-align:center}
.topic-row .t-stats b{display:block;color:var(--text);font-size:15px;font-family:var(--font-en)}

/* 积分 / 权益阶梯 */
.tier-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.tier{position:relative;background:var(--panel);border:1px solid var(--panel-border);border-radius:var(--radius);padding:28px 24px;transition:.3s;overflow:hidden}
.tier:hover{transform:translateY(-6px);box-shadow:var(--glow-blue)}
.tier.featured{border-color:var(--panel-border-strong);background:linear-gradient(180deg,rgba(0,255,224,.10),rgba(91,155,255,.05))}
.tier.featured::before{content:"推荐";position:absolute;top:14px;right:-30px;transform:rotate(45deg);background:var(--grad);color:#04101a;font-size:11px;font-weight:800;padding:5px 36px}
.tier .t-name{font-family:var(--font-en);letter-spacing:2px;font-size:14px;color:var(--cyan)}
.tier .t-pts{font-family:var(--font-en);font-size:38px;font-weight:800;margin:8px 0 4px;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.tier .t-pts small{font-size:14px;color:var(--text-mute);-webkit-text-fill-color:var(--text-mute)}
.tier .t-desc{font-size:13px;color:var(--text-mute);margin-bottom:16px}
.tier ul{display:flex;flex-direction:column;gap:10px}
.tier ul li{font-size:13.5px;color:var(--text-dim);display:flex;gap:9px;align-items:flex-start}
.tier ul li::before{content:"✓";color:var(--cyan);font-weight:800}
.points-bar{display:flex;align-items:center;gap:14px;background:var(--panel);border:1px solid var(--panel-border);border-radius:14px;padding:18px 22px;margin-bottom:28px}
.points-bar .pb-num{font-family:var(--font-en);font-size:30px;font-weight:800;color:var(--cyan)}
.points-bar .pb-track{flex:1;height:10px;border-radius:10px;background:rgba(255,255,255,.08);overflow:hidden}
.points-bar .pb-fill{height:100%;width:62%;background:var(--grad);border-radius:10px;box-shadow:var(--glow-cyan)}
.points-bar .pb-txt{font-size:13px;color:var(--text-dim);white-space:nowrap}

/* ---------- 13. 本地服务 / 表单 ---------- */
.svc-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.field{margin-bottom:18px}
.field label{display:block;font-size:13.5px;color:var(--text-dim);margin-bottom:8px}
.field input,.field select,.field textarea{
  width:100%;padding:13px 15px;border-radius:11px;background:rgba(7,11,20,.6);
  border:1px solid var(--panel-border);color:var(--text);font-family:inherit;font-size:14.5px;transition:.25s;
}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--cyan);box-shadow:var(--glow-cyan)}
.field textarea{resize:vertical;min-height:110px}
.form-card{background:var(--panel);border:1px solid var(--panel-border);border-radius:var(--radius);padding:30px;backdrop-filter:blur(10px)}
.light-panel{background:#f4f7fb;color:#16233b;border:1px solid #d9e2ee;border-radius:var(--radius);padding:34px}
.light-panel h2,.light-panel h3{color:#0d1b30}
.light-panel p,.light-panel li{color:#3a4a63}
.light-panel .brand-logo-light{height:50px;min-height:50px;width:auto;margin-bottom:14px}
.faq-item{border:1px solid var(--panel-border);border-radius:12px;margin-bottom:12px;overflow:hidden;background:var(--panel)}
.faq-q{padding:16px 20px;font-weight:700;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:12px}
.faq-q .pm{color:var(--cyan);font-size:20px;transition:.3s}
.faq-item.open .faq-q .pm{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease;padding:0 20px;color:var(--text-dim);font-size:14px}
.faq-item.open .faq-a{max-height:300px;padding:0 20px 18px}
.query-result{margin-top:18px;padding:18px 20px;border-radius:12px;background:rgba(0,255,224,.06);border:1px solid var(--panel-border);font-size:14px;color:var(--text-dim);display:none}
.query-result.show{display:block}

/* ---------- 14. 页脚 ---------- */
.site-footer{position:relative;z-index:2;background:linear-gradient(180deg,transparent,rgba(7,11,20,.9));border-top:1px solid var(--panel-border);padding:64px 0 28px;margin-top:40px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px}
.footer-grid .f-about p{color:var(--text-dim);font-size:14px;margin:16px 0;max-width:36ch}
.footer-grid h4{font-size:15px;margin-bottom:16px;color:#fff;letter-spacing:1px}
.footer-grid ul li{margin-bottom:11px}
.footer-grid ul li a{color:var(--text-dim);font-size:14px}
.footer-grid ul li a:hover{color:var(--cyan)}
.footer-social{display:flex;gap:12px;margin-top:8px}
.footer-social a{width:38px;height:38px;border-radius:10px;border:1px solid var(--panel-border);display:grid;place-items:center;color:var(--text-dim);transition:.25s}
.footer-social a:hover{color:#04101a;background:var(--grad);border-color:transparent;box-shadow:var(--glow-cyan)}
.footer-bottom{border-top:1px solid var(--panel-border);margin-top:40px;padding-top:22px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;color:var(--text-mute);font-size:13px}

/* ---------- 15. 滚动揭示动画 ---------- */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}

/* ---------- 16. 响应式 ---------- */
@media (max-width:1200px){
  .card-grid{grid-template-columns:repeat(2,1fr)}
  .tier-grid{grid-template-columns:repeat(2,1fr)}
  .stats{grid-template-columns:repeat(2,1fr)}
  .loop{grid-template-columns:repeat(2,1fr);gap:16px}
  .loop-step .step-no{font-size:34px}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:768px){
  .card-grid{grid-template-columns:1fr}
  .tier-grid{grid-template-columns:1fr}
  .stats{grid-template-columns:repeat(2,1fr)}
  .loop{grid-template-columns:1fr;gap:14px}
  .loop-step{padding:24px 18px 20px}
  .board-grid{grid-template-columns:1fr}
  .svc-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .section{padding:64px 0}
  .main-nav{position:fixed;top:var(--nav-h);left:0;right:0;
    background:rgba(8,12,22,.97);backdrop-filter:blur(16px);
    border-bottom:1px solid var(--panel-border);
    flex-direction:column;align-items:stretch;padding:14px 20px;
    transform:translateY(-120%);transition:transform .35s;max-height:calc(100vh - var(--nav-h));overflow:auto}
  .main-nav.open{transform:translateY(0)}
  .main-nav>ul{flex-direction:column;align-items:stretch;gap:4px;background:transparent;backdrop-filter:none;border:none;border-radius:0;padding:0;box-shadow:none}
  .main-nav>ul>li>a{padding:12px 14px;justify-content:space-between}
  .submenu{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;background:rgba(255,255,255,.03);border:none;margin:4px 0 6px;padding-left:10px}
  .submenu::before{display:none}
  .nav-toggle{display:block}
  .nav-cta{display:none}
  .nav-member{font-size:12px;gap:6px}
  .nav-member .nav-user{display:none}
  .slide-title{white-space:normal;font-size:clamp(32px,9vw,56px);line-height:1.12}
  .slide-sub{max-width:40ch}
  .slide-caption{padding:0 24px 8vh}
  .slide-caption .container{max-width:100%}
  .arrows{padding:0 10px}
  .arrow{width:44px;height:44px}
  .article-body{max-width:100%}
}
@media (max-width:480px){
  .stats{grid-template-columns:1fr}
  .container{padding:0 18px}
  .slide-actions{flex-direction:column;align-items:stretch}
  .slide-actions .btn{justify-content:center}
}