/* ==========================================================================
   中小学实验安全手册 · 新中式水墨留白
   配色 / 字体 / 圆角 / 装饰 严格遵循视觉规范
   ========================================================================== */
:root{
  --c-primary:#49a63a;          /* 主色 */
  --c-secondary:#b752a3;        /* 辅助色 */
  --c-accent:#36c94d;           /* 强调色 / CTA / 高亮 */
  --c-bg:#f9fbf8;               /* 页面背景 */
  --c-surface:#ffffff;          /* 卡片 / 表面 */
  --c-text:#1e2c1b;             /* 正文文字 */
  --c-sub:#607a5c;              /* 次要文字 */
  --c-line:#dce6db;             /* 描边 */
  --c-gold:#c3a15f;             /* 细描金（装饰线 / 印章） */
  --c-gold-deep:#a98447;
  --c-danger:#c4523f;           /* 错误反馈红（仅用于答错提示，辅助用途） */
  --serif:'Noto Serif SC','Songti SC',Georgia,'Times New Roman',serif;
  --sans:system-ui,-apple-system,'PingFang SC','Microsoft YaHei','Segoe UI',sans-serif;
  --radius:4px;
  --shadow-soft:0 1px 2px rgba(30,44,27,.04),0 12px 28px -18px rgba(30,44,27,.16);
  --shadow-lift:0 2px 4px rgba(30,44,27,.06),0 18px 42px -20px rgba(30,44,27,.24);
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:var(--sans);
  color:var(--c-text);
  background:var(--c-bg);
  line-height:1.85;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
/* 纸感底纹：极淡水墨晕染 */
body::before{
  content:"";
  position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:
    radial-gradient(1100px 520px at 88% -6%, rgba(183,82,163,.045), transparent 62%),
    radial-gradient(900px 560px at -8% 18%, rgba(73,166,58,.05), transparent 58%),
    radial-gradient(700px 420px at 50% 112%, rgba(195,161,95,.05), transparent 60%);
}
img,svg{display:block;max-width:100%}
a{color:var(--c-primary)}
button{font-family:inherit}
ul{list-style:none}

.container{max-width:1120px;margin:0 auto;padding:0 22px}

/* ==========================================================================
   头部导航
   ========================================================================== */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(249,251,248,.92);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--c-line);
}
.header-inner{
  max-width:1120px;margin:0 auto;padding:0 22px;
  height:70px;display:flex;align-items:center;justify-content:space-between;gap:18px;
}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--c-text);min-width:0}
.brand-seal{
  flex:0 0 auto;width:40px;height:40px;border:1.5px solid var(--c-gold);
  display:grid;place-items:center;
  font-family:var(--serif);font-size:20px;color:var(--c-gold-deep);
  border-radius:var(--radius);
  background:linear-gradient(160deg,#fffdf6,#fbf6e8);
  transition:transform .4s ease;
}
.brand:hover .brand-seal{transform:rotate(-8deg)}
.brand-name{
  font-family:var(--serif);font-weight:700;font-size:18px;letter-spacing:.12em;
  white-space:nowrap;
}
.brand-sub{display:block;font-family:var(--sans);font-weight:400;font-size:11px;color:var(--c-sub);letter-spacing:.42em;margin-top:2px}
.nav{display:flex;align-items:center;gap:2px}
.nav a{
  text-decoration:none;color:var(--c-sub);
  padding:9px 15px;border-radius:var(--radius);
  font-size:15px;letter-spacing:.08em;position:relative;
  transition:color .25s,background .25s;white-space:nowrap;
}
.nav a::after{
  content:"";position:absolute;left:15px;right:15px;bottom:3px;height:1.5px;
  background:var(--c-primary);transform:scaleX(0);transform-origin:left;
  transition:transform .32s ease;
}
.nav a:hover{color:var(--c-primary);background:rgba(73,166,58,.05)}
.nav a:hover::after{transform:scaleX(1)}
.nav a.active{color:var(--c-primary);font-weight:600}
.nav a.active::after{transform:scaleX(1);background:var(--c-secondary)}

/* ==========================================================================
   首页 · 卷首
   ========================================================================== */
.hero{position:relative;text-align:center;padding:86px 22px 54px;overflow:hidden}
.hero-ink{position:absolute;left:0;right:0;bottom:0;height:230px;z-index:-1;opacity:.9}
.hero-eyebrow{
  font-size:12.5px;letter-spacing:.5em;color:var(--c-sub);
  display:flex;align-items:center;justify-content:center;gap:16px;
}
.hero-eyebrow::before,.hero-eyebrow::after{content:"";height:1px;width:56px;
  background:linear-gradient(90deg,transparent,var(--c-gold));}
.hero-eyebrow::after{background:linear-gradient(90deg,var(--c-gold),transparent)}
.hero-title{
  font-family:var(--serif);font-weight:700;
  font-size:clamp(36px,5.6vw,60px);
  letter-spacing:.09em;margin:20px auto 8px;line-height:1.25;
}
.hero-title em{font-style:normal;color:var(--c-primary);border-bottom:1px solid rgba(73,166,58,.35)}
.hero-sub{color:var(--c-sub);max-width:640px;margin:18px auto 0;font-size:16px}
.hero-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-top:30px}
.hero-seal{
  display:inline-block;margin:28px auto 0;padding:8px 16px;
  border:1.5px solid var(--c-secondary);color:var(--c-secondary);
  font-family:var(--serif);font-size:13px;letter-spacing:.35em;
  transform:rotate(-2deg);border-radius:var(--radius);
  background:rgba(255,255,255,.6);
}
.hero-side{
  position:absolute;top:50%;transform:translateY(-50%);
  writing-mode:vertical-rl;letter-spacing:.55em;font-family:var(--serif);
  color:var(--c-sub);font-size:13px;opacity:.8;
}
.hero-side.left{left:26px}
.hero-side.right{right:26px;color:var(--c-gold-deep);opacity:.9}
.hero-side i{font-style:normal;display:inline-block;width:5px;height:5px;background:var(--c-gold);transform:rotate(45deg);margin:6px 0;align-self:center}

/* 内页页头 */
.page-head{text-align:center;padding:62px 22px 26px;position:relative}
.page-head .ph-eyebrow{color:var(--c-secondary);letter-spacing:.5em;font-size:12px}
.page-head h1{font-family:var(--serif);font-size:clamp(28px,4vw,44px);letter-spacing:.14em;margin:12px 0 10px}
.page-head p{color:var(--c-sub);font-size:15px;max-width:640px;margin:0 auto}
.page-head .ph-rule{display:flex;align-items:center;justify-content:center;gap:12px;margin-top:16px;color:var(--c-gold)}
.page-head .ph-rule::before,.page-head .ph-rule::after{content:"";height:1px;width:64px}
.page-head .ph-rule::before{background:linear-gradient(90deg,transparent,var(--c-gold))}
.page-head .ph-rule::after{background:linear-gradient(90deg,var(--c-gold),transparent)}

/* ==========================================================================
   通用区块
   ========================================================================== */
.section{padding:60px 0 18px}
.section-head{text-align:center;margin:0 auto 40px;max-width:760px}
.section-eyebrow{color:var(--c-secondary);letter-spacing:.42em;font-size:12px}
.section-title{font-family:var(--serif);font-size:clamp(25px,3.2vw,33px);margin:10px 0 8px;letter-spacing:.12em}
.section-title .cn-num{color:var(--c-gold-deep);font-size:.72em;margin-right:6px;font-weight:600}
.section-desc{color:var(--c-sub);font-size:15px}
.gold-rule{height:1px;border:0;background:linear-gradient(90deg,transparent,var(--c-gold),transparent);max-width:180px;margin:14px auto}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;gap:8px;justify-content:center;
  border:1px solid transparent;border-radius:var(--radius);
  padding:12px 26px;font-size:15px;letter-spacing:.12em;cursor:pointer;
  text-decoration:none;transition:transform .22s ease,box-shadow .22s ease,background .22s ease,color .22s ease,border-color .22s ease;
  user-select:none;
}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--c-primary);color:#fff}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 24px -12px rgba(73,166,58,.55)}
.btn-outline{border-color:var(--c-primary);color:var(--c-primary);background:transparent}
.btn-outline:hover{background:rgba(73,166,58,.07);transform:translateY(-2px)}
.btn-accent{background:var(--c-secondary);color:#fff}
.btn-accent:hover{transform:translateY(-2px);box-shadow:0 12px 24px -12px rgba(183,82,163,.5)}
.btn-highlight{background:var(--c-accent);color:#fff;font-weight:600}
.btn-highlight:hover{transform:translateY(-2px);box-shadow:0 12px 26px -12px rgba(54,201,77,.55)}
.btn-ghost{border-color:var(--c-line);color:var(--c-sub)}
.btn-ghost:hover{border-color:var(--c-gold);color:var(--c-gold-deep);transform:translateY(-2px)}
.btn[disabled]{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none}

/* 卡片 */
.card{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--radius);box-shadow:var(--shadow-soft)}

/* 滚动显现微动效 */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}

/* ==========================================================================
   首页 · 三大栏目
   ========================================================================== */
.column-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.column-card{
  position:relative;background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--radius);padding:34px 28px 30px;box-shadow:var(--shadow-soft);
  text-decoration:none;color:var(--c-text);display:flex;flex-direction:column;
  transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
  overflow:hidden;
}
.column-card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,var(--c-gold),var(--c-primary),transparent 72%);
  opacity:0;transition:opacity .3s ease;
}
.column-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lift);border-color:#cddbc9}
.column-card:hover::before{opacity:1}
.column-card .v-side{
  position:absolute;right:18px;top:22px;
  writing-mode:vertical-rl;font-family:var(--serif);font-size:13px;
  letter-spacing:.4em;color:var(--c-gold-deep);opacity:.85;
}
.column-num{font-family:var(--serif);font-size:14px;color:var(--c-secondary);letter-spacing:.3em}
.column-ico{
  width:60px;height:60px;border-radius:50%;margin:18px 0 16px;
  display:grid;place-items:center;color:#fff;
  box-shadow:inset 0 -6px 12px -8px rgba(0,0,0,.3),0 8px 18px -10px rgba(30,44,27,.35);
  transition:transform .35s ease;
}
.column-ico svg{width:28px;height:28px}
.column-card:hover .column-ico{transform:rotate(-6deg) scale(1.05)}
.ico-green{background:var(--c-primary)}
.ico-purple{background:var(--c-secondary)}
.ico-gold{background:linear-gradient(135deg,var(--c-gold),var(--c-gold-deep))}
.column-card h3{font-family:var(--serif);font-size:21px;letter-spacing:.1em;margin-bottom:8px}
.column-card p{color:var(--c-sub);font-size:14.5px;flex:1}
.column-go{margin-top:18px;font-size:14px;color:var(--c-primary);letter-spacing:.2em;display:flex;align-items:center;gap:6px}
.column-go .arr{transition:transform .3s ease}
.column-card:hover .column-go .arr{transform:translateX(6px)}

/* 首页警示条 */
.warn-strip{
  margin-top:52px;border:1px solid var(--c-line);border-left:3px solid var(--c-secondary);
  background:linear-gradient(180deg,#fff, #fcf7fb);border-radius:var(--radius);
  padding:20px 26px;display:flex;gap:18px;align-items:flex-start;
}
.warn-strip .warn-mark{flex:0 0 auto;width:34px;height:34px;border-radius:50%;background:var(--c-secondary);color:#fff;display:grid;place-items:center;font-family:var(--serif);font-size:17px}
.warn-strip strong{font-family:var(--serif);color:var(--c-text);letter-spacing:.06em}
.warn-strip p{color:var(--c-sub);font-size:14.5px;margin-top:2px}

/* 格言 */
.motto{
  margin:60px auto 18px;text-align:center;font-family:var(--serif);
  font-size:clamp(20px,2.6vw,28px);letter-spacing:.3em;color:var(--c-text);
}
.motto .en{display:block;font-family:var(--sans);font-size:12px;color:var(--c-gold-deep);letter-spacing:.5em;margin-top:12px}

/* ==========================================================================
   知识库 · 翻卡
   ========================================================================== */
.filter-bar{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin:6px auto 34px;max-width:860px}
.filter-btn{
  border:1px solid var(--c-line);background:var(--c-surface);color:var(--c-sub);
  border-radius:var(--radius);padding:8px 18px;font-size:14px;cursor:pointer;letter-spacing:.08em;
  transition:all .25s ease;
}
.filter-btn:hover{border-color:var(--c-primary);color:var(--c-primary)}
.filter-btn.active{background:var(--c-primary);border-color:var(--c-primary);color:#fff}

.k-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(238px,1fr));gap:22px}

.flip{height:288px;perspective:1300px;cursor:pointer;outline:none;-webkit-tap-highlight-color:transparent}
.flip-inner{position:relative;width:100%;height:100%;transition:transform .75s cubic-bezier(.3,.65,.3,1);transform-style:preserve-3d}
.flip.flipped .flip-inner{transform:rotateY(180deg)}
.face{
  position:absolute;inset:0;-webkit-backface-visibility:hidden;backface-visibility:hidden;
  border:1px solid var(--c-line);border-radius:var(--radius);background:var(--c-surface);
  box-shadow:var(--shadow-soft);padding:22px;overflow:hidden;
  transition:border-color .3s ease,box-shadow .3s ease;
}
.face:hover{border-color:#cddbc9;box-shadow:var(--shadow-lift)}
.face.front{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;text-align:center}
.face.front::after{
  content:"";position:absolute;left:-40px;bottom:-40px;width:150px;height:150px;border-radius:50%;
  background:radial-gradient(circle,rgba(73,166,58,.06),transparent 70%);
}
.face.back{transform:rotateY(180deg);background:linear-gradient(180deg,#ffffff,#f3f8f1);display:flex;flex-direction:column}
.face .corner-char{
  position:absolute;top:8px;right:14px;font-family:var(--serif);
  font-size:52px;color:rgba(73,166,58,.08);line-height:1;pointer-events:none;
}
.face .face-tag{font-size:11px;letter-spacing:.3em;color:var(--c-sub)}
.seal-char{
  width:58px;height:58px;border-radius:50%;display:grid;place-items:center;
  font-family:var(--serif);font-size:26px;color:#fff;
  box-shadow:inset 0 -6px 12px -8px rgba(0,0,0,.28);
}
.seal-green{background:var(--c-primary)}
.seal-purple{background:var(--c-secondary)}
.seal-gold{background:linear-gradient(135deg,var(--c-gold),var(--c-gold-deep))}
.face.front h4{font-family:var(--serif);font-size:20px;letter-spacing:.14em;position:relative;z-index:1}
.face.front .hint{
  position:absolute;bottom:14px;font-size:12px;color:var(--c-gold-deep);letter-spacing:.2em;
  display:flex;align-items:center;gap:6px;z-index:1;
}
.face.front .hint svg{animation:turnPulse 2.4s ease-in-out infinite}
@keyframes turnPulse{0%,100%{transform:rotate(0)}50%{transform:rotate(-160deg)}}
.face.back .back-title{
  font-family:var(--serif);font-size:15px;letter-spacing:.12em;color:var(--c-text);
  border-bottom:1px solid var(--c-line);padding-bottom:8px;margin-bottom:10px;
  display:flex;align-items:center;gap:8px;
}
.face.back .back-title::before{content:"";width:14px;height:2px;background:var(--c-primary)}
.face.back ul{flex:1;display:flex;flex-direction:column;gap:7px;overflow:auto}
.face.back li{font-size:13.2px;color:var(--c-text);line-height:1.6;padding-left:16px;position:relative}
.face.back li::before{content:"·";position:absolute;left:2px;color:var(--c-secondary);font-weight:700}
.face.back .flip-again{
  margin-top:10px;font-size:11.5px;color:var(--c-sub);letter-spacing:.2em;
  display:flex;align-items:center;gap:6px;justify-content:flex-end;
}

/* ==========================================================================
   知识库 · 危险品标识
   ========================================================================== */
.hazard-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:20px}
.hazard-item{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--radius);
  box-shadow:var(--shadow-soft);padding:22px 16px 18px;text-align:center;
  transition:transform .3s ease,box-shadow .3s ease;
}
.hazard-item:hover{transform:translateY(-5px);box-shadow:var(--shadow-lift)}
.hazard-diamond{width:92px;height:92px;margin:0 auto 14px;position:relative;display:grid;place-items:center}
.hazard-diamond .dia{
  position:absolute;inset:0;transform:rotate(45deg) scale(.8);border-radius:3px;
  border:1.5px solid rgba(20,30,20,.26);
  background:linear-gradient(160deg,#fff,#f7faf5);
}
.hazard-diamond svg{position:relative;z-index:1;width:46px;height:46px;color:var(--c-text)}
.hazard-item h4{font-family:var(--serif);font-size:17px;letter-spacing:.14em;margin-bottom:6px}
.hazard-item p{font-size:12.5px;color:var(--c-sub);line-height:1.7}
.hazard-note{
  margin-top:40px;background:linear-gradient(180deg,#fffdf4,#fbf6e4);
  border:1px solid #e7dab8;border-radius:var(--radius);padding:16px 22px;
  font-size:13.5px;color:#7a6a45;text-align:center;letter-spacing:.06em;
}

/* ==========================================================================
   情景模拟
   ========================================================================== */
.scene-list{max-width:780px;margin:0 auto;display:flex;flex-direction:column;gap:26px}
.scene{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--radius);
  box-shadow:var(--shadow-soft);padding:26px 26px 24px;position:relative;
}
.scene::before{content:"";position:absolute;left:0;top:24px;bottom:24px;width:3px;background:var(--c-gold);opacity:.5}
.scene-head{display:flex;align-items:center;gap:14px;margin-bottom:6px}
.scene-no{
  flex:0 0 auto;width:40px;height:40px;border-radius:50%;border:1.5px solid var(--c-gold);
  display:grid;place-items:center;font-family:var(--serif);color:var(--c-gold-deep);font-size:15px;
  background:linear-gradient(160deg,#fffdf6,#fbf6e8);
}
.scene-head h3{font-family:var(--serif);font-size:19px;letter-spacing:.06em}
.scene-sit{
  color:var(--c-text);font-size:15px;margin:8px 0 14px;padding:14px 16px;background:var(--c-bg);
  border:1px dashed var(--c-line);border-radius:var(--radius);position:relative;
}
.scene-sit::before{content:"情景";position:absolute;top:-11px;left:12px;background:var(--c-bg);padding:0 8px;font-size:11px;color:var(--c-secondary);letter-spacing:.3em}
.opt{
  display:block;width:100%;text-align:left;border:1px solid var(--c-line);background:#fff;
  border-radius:var(--radius);padding:12px 16px;margin:10px 0;cursor:pointer;
  font-size:14.5px;color:var(--c-text);letter-spacing:.03em;
  transition:border-color .22s,background .22s,transform .18s;
}
.opt:hover{border-color:var(--c-primary);background:#f0f8ee;transform:translateX(4px)}
.opt .opt-key{
  display:inline-block;width:24px;height:24px;line-height:22px;text-align:center;
  border:1px solid var(--c-line);border-radius:50%;font-size:12.5px;color:var(--c-sub);
  margin-right:10px;vertical-align:middle;font-family:var(--serif);
  transition:all .22s;
}
.opt:hover .opt-key{border-color:var(--c-primary);color:var(--c-primary)}
.opt.correct{border-color:var(--c-accent);background:#eef9ec}
.opt.correct .opt-key{background:var(--c-accent);border-color:var(--c-accent);color:#fff}
.opt.wrong{border-color:var(--c-danger);background:#fdf1ef}
.opt.wrong .opt-key{background:var(--c-danger);border-color:var(--c-danger);color:#fff}
.opt.dim{opacity:.5}
.opt[disabled]{cursor:default}
.opt[disabled]:hover{transform:none}
.feedback{
  border-left:3px solid var(--c-secondary);background:linear-gradient(180deg,#fdf9fc,#faf2f9);
  border-radius:var(--radius);padding:14px 18px;margin-top:14px;font-size:14px;display:none;
  animation:fadeUp .4s ease;
}
.feedback.show{display:block}
.feedback .fb-title{font-family:var(--serif);color:var(--c-secondary);letter-spacing:.12em;font-size:14px;margin-bottom:4px}
.feedback p{color:var(--c-text)}
@keyframes fadeUp{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}

.scene-summary{
  max-width:780px;margin:44px auto 0;text-align:center;background:var(--c-surface);
  border:1px solid var(--c-line);border-radius:var(--radius);box-shadow:var(--shadow-soft);
  padding:36px 28px;display:none;
}
.scene-summary.show{display:block;animation:fadeUp .5s ease}
.scene-summary .big{
  font-family:var(--serif);font-size:52px;color:var(--c-primary);letter-spacing:.08em;line-height:1.2;
}
.scene-summary .verdict{font-family:var(--serif);font-size:22px;letter-spacing:.14em;margin:10px 0 6px}
.scene-summary p{color:var(--c-sub);font-size:14.5px;margin-bottom:18px}
.scene-summary .actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}

/* ==========================================================================
   在线测试
   ========================================================================== */
.test-shell{max-width:840px;margin:0 auto}
.intro-panel{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--radius);
  box-shadow:var(--shadow-soft);padding:30px 32px;text-align:center;
}
.intro-panel .ip-title{font-family:var(--serif);font-size:24px;letter-spacing:.14em}
.intro-panel .ip-sub{color:var(--c-sub);font-size:14px;margin:6px 0 18px}
.rules{list-style:none;margin:0 auto 24px;display:grid;gap:8px;max-width:460px;text-align:left}
.rules li{font-size:14.5px;color:var(--c-sub);padding-left:22px;position:relative}
.rules li::before{
  content:"";position:absolute;left:0;top:9px;width:10px;height:10px;
  border:1.5px solid var(--c-gold);transform:rotate(45deg);
}
.field-label{font-family:var(--serif);font-size:14px;letter-spacing:.14em;color:var(--c-sub)}
.name-input{
  width:100%;max-width:360px;margin-top:8px;padding:12px 14px;font-size:16px;
  border:1px solid var(--c-line);border-radius:var(--radius);background:#fff;color:var(--c-text);
  outline:none;transition:border-color .25s,box-shadow .25s;font-family:var(--sans);
}
.name-input:focus{border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(73,166,58,.12)}
.name-input::placeholder{color:#a9bda5}

.quiz-head{
  display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:16px;flex-wrap:wrap;
}
.quiz-progress-label{font-family:var(--serif);font-size:15px;letter-spacing:.1em;color:var(--c-sub)}
.progress-track{flex:1;min-width:180px;height:6px;background:#e6eee2;border-radius:99px;overflow:hidden}
.progress-fill{height:100%;width:0%;background:linear-gradient(90deg,var(--c-primary),var(--c-accent));border-radius:99px;transition:width .45s ease}

.question{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--radius);
  box-shadow:var(--shadow-soft);padding:28px 30px;margin-bottom:22px;
  animation:fadeUp .45s ease;
}
.q-no{font-family:var(--serif);color:var(--c-secondary);letter-spacing:.3em;font-size:13px}
.q-title{font-family:var(--serif);font-size:19px;letter-spacing:.04em;margin:8px 0 18px;line-height:1.7}
.answers{display:flex;flex-direction:column;gap:10px}
.ans{
  display:flex;align-items:center;gap:12px;border:1px solid var(--c-line);border-radius:var(--radius);
  padding:12px 16px;cursor:pointer;font-size:14.5px;background:#fff;transition:all .2s ease;
}
.ans:hover{border-color:var(--c-primary);background:#f3f9f1}
.ans .ans-key{
  flex:0 0 auto;width:26px;height:26px;border:1px solid var(--c-line);border-radius:50%;
  display:grid;place-items:center;font-family:var(--serif);font-size:13px;color:var(--c-sub);
  transition:all .2s;
}
.ans:hover .ans-key{border-color:var(--c-primary);color:var(--c-primary)}
.ans.sel{border-color:var(--c-primary);background:#f3f9f1}
.ans.sel .ans-key{border-color:var(--c-primary);background:var(--c-primary);color:#fff}
.ans.correct{border-color:var(--c-accent);background:#eef9ec}
.ans.correct .ans-key{background:var(--c-accent);border-color:var(--c-accent);color:#fff}
.ans.wrong{border-color:var(--c-danger);background:#fdf1ef}
.ans.wrong .ans-key{background:var(--c-danger);border-color:var(--c-danger);color:#fff}
.ans.dim{opacity:.55}
.ans[disabled]{cursor:default}
.ans[disabled]:hover{transform:none;background:#fff}
.ans[disabled].correct:hover,.ans[disabled].wrong:hover{background:inherit}

.test-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin:26px 0 8px}

/* 成绩面板 */
.result-panel{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--radius);
  box-shadow:var(--shadow-soft);padding:40px 32px;text-align:center;display:none;position:relative;overflow:hidden;
}
.result-panel::before{content:"☯";position:absolute;right:-40px;top:-40px;font-size:220px;color:rgba(183,82,163,.05);line-height:1;pointer-events:none}
.result-panel.show{display:block;animation:fadeUp .5s ease}
.result-stamp{
  width:74px;height:74px;margin:0 auto 18px;border-radius:50%;border:2.5px solid var(--c-gold);
  display:grid;place-items:center;background:linear-gradient(160deg,#fffdf6,#fbf4e2);
}
.result-stamp .st-inner{width:58px;height:58px;border-radius:50%;border:1px solid var(--c-gold);display:grid;place-items:center;font-family:var(--serif);color:var(--c-gold-deep);font-size:22px}
.result-title{font-family:var(--serif);font-size:26px;letter-spacing:.14em}
.result-score{font-family:var(--serif);font-size:56px;color:var(--c-primary);letter-spacing:.06em;margin:14px 0 2px;line-height:1.2}
.result-total{color:var(--c-sub);font-size:14px}
.result-comment{max-width:520px;margin:16px auto 22px;color:var(--c-sub);font-size:15px}
.result-meta{display:flex;gap:26px;justify-content:center;flex-wrap:wrap;font-size:13px;color:var(--c-sub);margin-top:18px}
.result-meta b{color:var(--c-text);font-weight:600}
.latest-badge{
  display:inline-flex;gap:8px;align-items:center;font-size:12.5px;color:var(--c-sub);
  border:1px solid var(--c-line);border-radius:99px;padding:6px 14px;background:#fff;margin:8px auto 0;
}

/* 证书 */
.cert-panel{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--radius);
  box-shadow:var(--shadow-soft);padding:34px 30px;text-align:center;display:none;margin-top:26px;
}
.cert-panel.show{display:block;animation:fadeUp .6s ease}
.cert-panel h3{font-family:var(--serif);font-size:22px;letter-spacing:.14em;margin-bottom:6px}
.cert-panel>p{color:var(--c-sub);font-size:13.5px;margin-bottom:18px}
.cert-canvas-wrap{
  display:inline-block;max-width:100%;border:1px solid var(--c-line);border-radius:var(--radius);
  padding:10px;background:#fbfaf4;box-shadow:var(--shadow-soft);
}
#certCanvas{max-width:100%;height:auto;display:block;border-radius:2px}
.cert-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:20px}

/* ==========================================================================
   页脚
   ========================================================================== */
.site-footer{
  margin-top:72px;border-top:1px solid var(--c-line);
  background:linear-gradient(180deg,var(--c-bg),#f0f5ec);
}
.footer-inner{max-width:1120px;margin:0 auto;padding:40px 22px 30px;text-align:center}
.footer-seal{
  display:inline-grid;place-items:center;width:52px;height:52px;margin-bottom:14px;
  border:1.5px solid var(--c-gold);border-radius:var(--radius);color:var(--c-gold-deep);
  font-family:var(--serif);font-size:24px;background:linear-gradient(160deg,#fffdf6,#fbf6e8);
}
.footer-name{font-family:var(--serif);font-size:17px;letter-spacing:.16em;color:var(--c-text)}
.footer-links{display:flex;gap:20px;justify-content:center;flex-wrap:wrap;margin:14px 0;font-size:14px}
.footer-links a{text-decoration:none;color:var(--c-sub);transition:color .25s}
.footer-links a:hover{color:var(--c-primary)}
.footer-copy{font-size:12.5px;color:var(--c-sub);letter-spacing:.08em}

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width:900px){
  .hero-side{display:none}
  .column-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  .header-inner{height:auto;padding:12px 16px;flex-direction:column;align-items:flex-start;gap:6px}
  .nav{width:100%;overflow-x:auto;gap:0;padding-bottom:4px;-webkit-overflow-scrolling:touch}
  .nav a{padding:7px 12px;font-size:14px}
  .brand-name{font-size:16px}
  .hero{padding:58px 18px 44px}
  .hero-ink{height:170px}
  .section{padding:46px 0 12px}
  .column-grid{grid-template-columns:1fr}
  .k-grid{grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:14px}
  .flip{height:252px}
  .scene{padding:20px 18px}
  .question{padding:22px 18px}
  .intro-panel,.result-panel{padding:28px 18px}
}