/* ============================================================
 * 연세대학교 예술원 · v2 · Institutional Style
 * 参考：연세 본사 / 서울대 미술대학 / 홍익대 미술대학
 * 设计语言：克制、严谨、白底、Yonsei Blue 主导，无装饰性元素
 * ============================================================ */

:root{
  /* Yonsei 官方品牌色 */
  --ys-blue:#003876;       /* Yonsei University Blue */
  --ys-blue-2:#0a4a96;
  --ys-blue-deep:#002554;
  --ys-gold:#b58500;       /* Yonsei Gold */
  --ys-red:#a8001f;        /* 学术深红，用于警示 */

  --ink:#1f2937;
  --ink-2:#4b5563;
  --muted:#6b7280;
  --muted-2:#9ca3af;
  --line:#e5e7eb;
  --line-2:#d1d5db;
  --bg:#ffffff;
  --bg-2:#f8f9fa;
  --bg-3:#f1f3f5;

  --font-sans: "Pretendard", "Pretendard Variable",
               "Apple SD Gothic Neo", "Malgun Gothic",
               -apple-system, BlinkMacSystemFont,
               "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
               system-ui, sans-serif;
  --font-serif: "Noto Serif KR", "Source Han Serif SC",
                "Songti SC", STSong, Georgia, serif;
  --font-en-display: "Times New Roman", Georgia, serif;

  --maxw: 1280px;
  --maxw-narrow: 880px;
  --pad-x: clamp(16px, 4vw, 40px);

  --shadow-sm: 0 1px 2px rgba(0,0,0,.04);
  --shadow-md: 0 4px 16px -4px rgba(0,40,90,.10);
  --shadow-lg: 0 12px 32px -8px rgba(0,40,90,.16);
}

@import url("https://cdn.jsdelivr.net/npm/pretendard@1.3.9/dist/web/static/pretendard.min.css");

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-sans);
  color:var(--ink);
  background:var(--bg);
  font-size:15px;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  -webkit-tap-highlight-color:transparent;
  letter-spacing:-.005em;
}
a{color:inherit;text-decoration:none;transition:color .15s}
a:hover{color:var(--ys-blue)}
img{max-width:100%;display:block}
button{font-family:inherit}

/* ============================================================
 * 顶部 utility bar — Yonsei navy thin strip
 * ============================================================ */
.utility-bar{
  background:var(--ys-blue-deep);
  color:rgba(255,255,255,.78);
  font-size:12px;
  letter-spacing:.04em;
}
.utility-bar .row{
  max-width:var(--maxw);
  margin:0 auto;
  padding:8px var(--pad-x);
  display:flex;justify-content:space-between;align-items:center;gap:16px;
}
.utility-bar a{color:rgba(255,255,255,.78)}
.utility-bar a:hover{color:#fff}
.utility-bar .left{display:flex;gap:18px}
.utility-bar .right{display:flex;gap:14px}
.utility-bar .right a{padding:0 6px;border-left:1px solid rgba(255,255,255,.18)}
.utility-bar .right a:first-child{border-left:none}
.utility-bar .lang.active{color:#fff;font-weight:600}

/* ============================================================
 * 主头部 / 导航
 * ============================================================ */
.site-header{
  background:#fff;
  border-bottom:1px solid var(--line);
}
.site-header .row{
  max-width:var(--maxw);
  margin:0 auto;
  padding:18px var(--pad-x);
  display:flex;align-items:center;justify-content:space-between;gap:32px;
}
.brand-block{display:flex;align-items:center;gap:18px;min-width:0}
.brand-mark{
  flex-shrink:0;
  width:42px;height:42px;
  background:var(--ys-blue);
  color:#fff;
  border-radius:2px;
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-en-display);
  font-weight:700;
  font-size:16px;
  letter-spacing:.04em;
}
.brand-text{
  display:flex;flex-direction:column;line-height:1.2;
  min-width:0;
}
.brand-text .ko{
  font-family:var(--font-serif);
  font-weight:600;
  font-size:18px;
  color:var(--ink);
  letter-spacing:.01em;
}
.brand-text .en{
  font-size:11.5px;
  color:var(--muted);
  letter-spacing:.18em;
  text-transform:uppercase;
  margin-top:2px;
  font-weight:500;
}
.brand-text .cn{
  font-size:13px;
  color:var(--ys-blue);
  font-weight:500;
  margin-top:2px;
}

.nav-main{display:flex;align-items:center;gap:6px}
.nav-main a{
  padding:10px 16px;
  font-size:14px;
  color:var(--ink);
  font-weight:500;
  position:relative;
  letter-spacing:0;
}
.nav-main a:hover{color:var(--ys-blue)}
.nav-main a.active{color:var(--ys-blue);font-weight:600}
.nav-main a.active::after{
  content:"";position:absolute;left:16px;right:16px;bottom:-2px;
  height:2px;background:var(--ys-blue);
}
.nav-main .cta{
  margin-left:8px;
  background:var(--ys-blue);
  color:#fff;
  padding:10px 22px;
  border-radius:2px;
}
.nav-main .cta:hover{background:var(--ys-blue-2);color:#fff}
.nav-main .cta::after{display:none}

.nav-toggle{
  display:none;
  width:42px;height:42px;
  border:1px solid var(--line);
  background:#fff;cursor:pointer;
  align-items:center;justify-content:center;
}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  display:block;width:18px;height:2px;background:var(--ink);
  position:relative;transition:.2s;
}
.nav-toggle span::before{content:"";position:absolute;top:-6px;left:0}
.nav-toggle span::after{content:"";position:absolute;top:6px;left:0}
.nav-toggle.open span{background:transparent}
.nav-toggle.open span::before{transform:rotate(45deg);top:0}
.nav-toggle.open span::after{transform:rotate(-45deg);top:0}

@media (max-width:1024px){
  .nav-main{
    position:fixed;top:0;right:0;
    width:min(86vw,360px);height:100vh;
    background:#fff;
    border-left:1px solid var(--line);
    flex-direction:column;align-items:stretch;gap:0;
    padding:24px 0;
    transform:translateX(100%);transition:transform .25s ease;
    z-index:200;overflow-y:auto;
  }
  .nav-main.open{transform:translateX(0);box-shadow:-12px 0 32px rgba(0,40,90,.16)}
  .nav-main a{
    padding:14px 28px;border-bottom:1px solid var(--line);
    border-radius:0;
  }
  .nav-main a.active::after{display:none}
  .nav-main a.active{background:var(--bg-2);border-left:3px solid var(--ys-blue);padding-left:25px}
  .nav-main .cta{margin:14px 28px;text-align:center;padding:14px 22px}
  .nav-toggle{display:flex}
}

/* ============================================================
 * 容器 & 页面骨架
 * ============================================================ */
.container{
  max-width:var(--maxw);
  margin:0 auto;
  padding:0 var(--pad-x);
}
.container.narrow{max-width:var(--maxw-narrow)}

.section{padding:clamp(56px,7vw,100px) 0}
.section.tight{padding:clamp(36px,5vw,64px) 0}
.section.alt{background:var(--bg-2)}
.section.dark{background:var(--ys-blue-deep);color:#fff}
.section.dark a{color:#fff}

.section-head{
  margin-bottom:48px;
  display:flex;align-items:flex-end;justify-content:space-between;gap:28px;flex-wrap:wrap;
}
.section-head .label{
  font-size:11.5px;letter-spacing:.28em;text-transform:uppercase;
  color:var(--ys-blue);
  font-weight:700;
  margin-bottom:14px;
  display:inline-block;
}
.section-head .label::before{
  content:"";display:inline-block;width:24px;height:1px;background:var(--ys-blue);vertical-align:middle;margin-right:10px;
}
.section-head h2{
  font-family:var(--font-serif);
  font-weight:600;
  font-size:clamp(26px,3.2vw,36px);
  line-height:1.25;
  color:var(--ink);
  letter-spacing:0;
}
.section-head h2 .en{
  display:block;
  font-family:var(--font-en-display);
  font-weight:400;
  font-size:14px;
  color:var(--muted);
  letter-spacing:.18em;
  margin-top:8px;
  text-transform:uppercase;
}
.section-head .lead-link{
  font-size:13px;color:var(--ys-blue);font-weight:500;
  letter-spacing:.04em;align-self:flex-end;
}
.section-head .lead-link::after{content:" →";font-family:var(--font-en-display)}

.section.dark .section-head .label{color:#fff}
.section.dark .section-head .label::before{background:#fff}
.section.dark .section-head h2{color:#fff}
.section.dark .section-head h2 .en{color:rgba(255,255,255,.6)}

/* ============================================================
 * 段落正文样式
 * ============================================================ */
.lead{
  font-size:17px;line-height:1.85;color:var(--ink-2);
  max-width:780px;font-weight:400;
}
.lead strong{color:var(--ys-blue);font-weight:600}
.body-prose{color:var(--ink-2);line-height:1.85;font-size:15.5px}
.body-prose p{margin-bottom:18px}
.body-prose p:last-child{margin-bottom:0}
.body-prose strong{color:var(--ink);font-weight:600}
.muted{color:var(--muted)}

/* ============================================================
 * 按钮
 * ============================================================ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:13px 28px;
  font-size:14px;
  font-weight:600;
  letter-spacing:.02em;
  border:1px solid var(--ys-blue);
  background:var(--ys-blue);color:#fff;
  border-radius:2px;
  cursor:pointer;
  transition:.15s;
}
.btn:hover{background:var(--ys-blue-2);border-color:var(--ys-blue-2);color:#fff}
.btn.outline{background:transparent;color:var(--ys-blue);border-color:var(--ys-blue)}
.btn.outline:hover{background:var(--ys-blue);color:#fff}
.btn.ghost{background:transparent;color:var(--ink);border-color:var(--line-2)}
.btn.ghost:hover{background:var(--bg-2);color:var(--ink);border-color:var(--ink)}
.btn.gold{background:var(--ys-gold);border-color:var(--ys-gold)}
.btn.gold:hover{background:#9d7300;border-color:#9d7300;color:#fff}
.btn.lg{padding:16px 36px;font-size:15px}
.btn.sm{padding:8px 18px;font-size:13px}
.btn .arr{font-family:var(--font-en-display);transition:transform .15s}
.btn:hover .arr{transform:translateX(3px)}
.section.dark .btn.outline{color:#fff;border-color:#fff}
.section.dark .btn.outline:hover{background:#fff;color:var(--ys-blue-deep)}

.button-row{display:flex;gap:14px;flex-wrap:wrap;margin-top:32px}

/* ============================================================
 * Hero
 * ============================================================ */
.hero{
  background:linear-gradient(180deg,#fff 0%, var(--bg-2) 100%);
  padding:clamp(48px,8vw,90px) 0 clamp(60px,9vw,110px);
  border-bottom:1px solid var(--line);
}
.hero .crumbs{
  font-size:12.5px;color:var(--muted);
  letter-spacing:.04em;margin-bottom:18px;
}
.hero .crumbs a{color:var(--muted)}
.hero .crumbs a:hover{color:var(--ys-blue)}
.hero .crumbs span.sep{margin:0 10px;color:var(--line-2)}
.hero .crumbs em{font-style:normal;color:var(--ink);font-weight:500}
.hero .label{
  font-size:11.5px;letter-spacing:.28em;text-transform:uppercase;
  color:var(--ys-blue);font-weight:700;
  display:inline-flex;align-items:center;gap:10px;
}
.hero .label::before{content:"";width:24px;height:1px;background:var(--ys-blue)}
.hero h1{
  font-family:var(--font-serif);
  font-weight:600;
  font-size:clamp(32px,5vw,52px);
  line-height:1.18;
  color:var(--ink);
  letter-spacing:-.005em;
  margin-top:18px;
}
.hero h1 .en{
  display:block;
  font-family:var(--font-en-display);
  font-weight:400;
  font-size:clamp(18px,2vw,24px);
  color:var(--muted);
  letter-spacing:.14em;
  margin-top:14px;
  text-transform:uppercase;
}
.hero h1 .cn{
  display:block;
  font-family:var(--font-sans);
  font-weight:600;
  font-size:clamp(20px,2.4vw,28px);
  color:var(--ys-blue);
  margin-top:14px;
}
.hero .deck{
  margin-top:28px;
  font-size:17px;line-height:1.85;
  color:var(--ink-2);
  max-width:760px;
}

/* 主页 hero */
.hero-home{
  position:relative;
  padding:clamp(80px,12vw,160px) 0;
  background:
    linear-gradient(135deg, rgba(0,56,118,.94) 0%, rgba(0,37,84,.94) 100%),
    radial-gradient(circle at 70% 30%, rgba(181,133,0,.4) 0%, transparent 60%);
  color:#fff;
  border-bottom:1px solid var(--line);
}
.hero-home::after{
  content:"";position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size:80px 80px;
  pointer-events:none;
}
.hero-home .container{position:relative;z-index:2}
.hero-home .label{color:rgba(255,255,255,.85)}
.hero-home .label::before{background:rgba(255,255,255,.85)}
.hero-home h1{color:#fff;font-size:clamp(34px,5.4vw,60px)}
.hero-home h1 .en{color:rgba(255,255,255,.6)}
.hero-home h1 .cn{color:#fff;font-weight:500}
.hero-home .deck{color:rgba(255,255,255,.85);max-width:760px}
.hero-home .button-row .btn.outline{color:#fff;border-color:rgba(255,255,255,.5)}
.hero-home .button-row .btn.outline:hover{background:#fff;color:var(--ys-blue-deep)}

/* 授权徽标 */
.auth-mark{
  display:inline-flex;align-items:center;gap:10px;
  margin-top:14px;
  padding:6px 12px;
  border:1px solid rgba(255,255,255,.5);
  font-size:11.5px;letter-spacing:.18em;text-transform:uppercase;
  color:#fff;font-weight:600;
}
.auth-mark::before{
  content:"";width:6px;height:6px;border-radius:50%;background:#ffd24d;
  box-shadow:0 0 0 2px rgba(255,210,77,.3);
}

/* ============================================================
 * 数据统计条
 * ============================================================ */
.stats-strip{
  background:#fff;
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.stats-strip .grid{
  max-width:var(--maxw);margin:0 auto;
  padding:0 var(--pad-x);
  display:grid;grid-template-columns:repeat(4,1fr);
}
.stats-strip .item{
  padding:32px 24px;
  border-left:1px solid var(--line);
  text-align:center;
}
.stats-strip .item:first-child{border-left:none}
.stats-strip .v{
  font-family:var(--font-en-display);
  font-weight:400;
  font-size:clamp(28px,3.5vw,40px);
  color:var(--ys-blue);
  letter-spacing:.01em;
  line-height:1;
}
.stats-strip .v small{
  font-size:13px;color:var(--muted);
  font-family:var(--font-sans);font-weight:500;
  margin-left:6px;letter-spacing:.05em;
}
.stats-strip .k{
  font-size:12px;color:var(--muted);
  letter-spacing:.18em;text-transform:uppercase;
  margin-top:10px;font-weight:500;
}
@media (max-width:760px){
  .stats-strip .grid{grid-template-columns:repeat(2,1fr)}
  .stats-strip .item:nth-child(3){border-left:none}
  .stats-strip .item:nth-child(3),.stats-strip .item:nth-child(4){border-top:1px solid var(--line)}
}

/* ============================================================
 * 卡片网格
 * ============================================================ */
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
@media (max-width:980px){
  .grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:560px){
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr;gap:16px}
}

.card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:2px;
  padding:28px 26px;
  transition:.15s;
  position:relative;
  display:flex;flex-direction:column;
}
.card:hover{border-color:var(--ys-blue);box-shadow:var(--shadow-md);transform:translateY(-1px)}
.card .num{
  font-family:var(--font-en-display);
  font-size:13px;letter-spacing:.16em;
  color:var(--ys-blue);font-weight:500;text-transform:uppercase;
}
.card h3{
  font-family:var(--font-serif);
  font-weight:600;font-size:19px;line-height:1.4;
  color:var(--ink);margin:12px 0 10px;
}
.card h3 .ko{
  display:block;
  font-family:var(--font-sans);font-weight:500;
  font-size:12.5px;color:var(--muted);
  letter-spacing:.05em;margin-top:5px;
}
.card p{
  font-size:14.5px;line-height:1.75;color:var(--ink-2);
  flex:1;
}
.card .more{
  margin-top:18px;
  font-size:12.5px;letter-spacing:.04em;
  color:var(--ys-blue);font-weight:600;
}
.card .more::after{content:" →";font-family:var(--font-en-display);transition:transform .15s;display:inline-block;margin-left:2px}
.card:hover .more::after{transform:translateX(3px)}

/* ============================================================
 * Programs 学域卡片
 * ============================================================ */
.dept-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
@media (max-width:980px){.dept-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:560px){.dept-grid{grid-template-columns:1fr}}
.dept-card{
  display:block;
  background:#fff;padding:36px 26px 30px;
  transition:.2s;color:inherit;
  min-height:240px;position:relative;
}
.dept-card:hover{background:var(--bg-2)}
.dept-card .ko{
  font-family:var(--font-serif);
  font-size:13px;color:var(--muted);letter-spacing:.18em;font-weight:500;
}
.dept-card h3{
  font-family:var(--font-serif);
  font-weight:600;font-size:24px;color:var(--ink);
  margin-top:8px;line-height:1.3;
}
.dept-card .en{
  font-family:var(--font-en-display);
  font-size:13px;color:var(--ys-blue);
  letter-spacing:.16em;margin-top:6px;text-transform:uppercase;
  font-weight:500;
}
.dept-card p{
  font-size:13.5px;color:var(--ink-2);
  margin-top:18px;line-height:1.7;
}
.dept-card .more{
  font-size:11.5px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--ys-blue);font-weight:600;
  position:absolute;bottom:24px;left:26px;
}
.dept-card .more::after{content:" →";display:inline-block;margin-left:4px;transition:transform .15s}
.dept-card:hover .more::after{transform:translateX(3px)}

/* ============================================================
 * News 列表
 * ============================================================ */
.news-list{border-top:1px solid var(--line)}
.news-row{
  display:grid;grid-template-columns:160px 90px 1fr 80px;gap:24px;
  padding:22px 0;border-bottom:1px solid var(--line);
  align-items:center;
}
@media (max-width:760px){
  .news-row{grid-template-columns:1fr;gap:8px;padding:18px 0}
  .news-row .arr{display:none}
}
.news-row .date{
  font-family:var(--font-en-display);
  font-size:15px;color:var(--ys-blue);
  letter-spacing:.05em;font-weight:400;
}
.news-row .cat{
  font-size:11px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--ys-blue);font-weight:600;
  border:1px solid var(--ys-blue);
  padding:3px 8px;display:inline-block;width:fit-content;
}
.news-row .title{
  font-size:16px;color:var(--ink);font-weight:500;
}
.news-row:hover .title{color:var(--ys-blue)}
.news-row .arr{font-family:var(--font-en-display);color:var(--muted-2);text-align:right;transition:.15s}
.news-row:hover .arr{color:var(--ys-blue);transform:translateX(3px)}

/* ============================================================
 * 时间线（招生流程）
 * ============================================================ */
.timeline{
  position:relative;padding-left:0;
}
.timeline-item{
  display:grid;grid-template-columns:120px 1fr;gap:24px;
  padding:24px 0;border-top:1px solid var(--line);
}
.timeline-item:first-child{border-top:none}
@media (max-width:560px){
  .timeline-item{grid-template-columns:1fr;gap:8px}
}
.timeline-item .step{
  font-family:var(--font-en-display);
  font-size:14px;color:var(--ys-blue);font-weight:500;
  letter-spacing:.05em;
}
.timeline-item .step strong{
  display:block;font-size:30px;color:var(--ink);
  font-weight:400;margin-top:4px;
}
.timeline-item h4{
  font-family:var(--font-serif);
  font-weight:600;font-size:18px;color:var(--ink);
  margin-bottom:8px;
}
.timeline-item p{
  font-size:14px;color:var(--ink-2);line-height:1.75;
}

/* ============================================================
 * 数据条目（KV）
 * ============================================================ */
.kv-row{
  display:grid;grid-template-columns:200px 1fr;
  gap:0;border-bottom:1px solid var(--line);
}
.kv-row .k{
  padding:14px 16px;
  background:var(--bg-2);
  font-size:13px;color:var(--ink);font-weight:500;
  letter-spacing:.02em;
  border-right:1px solid var(--line);
}
.kv-row .v{
  padding:14px 18px;
  font-size:14px;color:var(--ink-2);line-height:1.75;
}
@media (max-width:560px){
  .kv-row{grid-template-columns:1fr}
  .kv-row .k{border-right:none;border-bottom:1px solid var(--line);font-size:12px;letter-spacing:.18em;text-transform:uppercase}
}

/* 顶部边框列表 */
.kv-table{border-top:1px solid var(--line)}

/* ============================================================
 * 表单
 * ============================================================ */
.form-shell{
  background:#fff;
  border:1px solid var(--line);
  padding:clamp(24px,4vw,48px);
}
.form-shell h2{
  font-family:var(--font-serif);
  font-weight:600;font-size:22px;color:var(--ink);
  padding-bottom:14px;border-bottom:2px solid var(--ys-blue);
  margin-bottom:22px;
  display:flex;align-items:baseline;gap:10px;
}
.form-shell h2 .ko{font-size:13px;color:var(--muted);font-weight:400;font-family:var(--font-sans)}
.form-shell .hint{
  font-size:13.5px;color:var(--muted);
  margin-bottom:24px;line-height:1.7;
  background:var(--bg-2);
  padding:12px 16px;border-left:3px solid var(--ys-blue);
}

.steps{
  display:grid;grid-template-columns:repeat(5,1fr);gap:0;
  margin-bottom:36px;
  border:1px solid var(--line);background:#fff;
}
.steps .step{
  padding:14px 12px;text-align:center;
  font-size:12px;color:var(--muted);letter-spacing:.04em;
  border-left:1px solid var(--line);position:relative;
  font-weight:500;
}
.steps .step:first-child{border-left:none}
.steps .step .num{
  display:inline-block;
  font-family:var(--font-en-display);
  font-size:11px;letter-spacing:.1em;
  color:var(--muted-2);font-weight:400;
  margin-right:6px;
}
.steps .step.active{color:var(--ys-blue);font-weight:600;background:var(--bg-2)}
.steps .step.active .num{color:var(--ys-blue)}
.steps .step.active::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:2px;background:var(--ys-blue);
}
.steps .step.done{color:var(--muted)}
.steps .step.done .num{color:var(--ys-blue)}
@media (max-width:680px){
  .steps{grid-template-columns:repeat(5,minmax(0,1fr))}
  .steps .step{padding:10px 4px;font-size:10px;letter-spacing:.02em}
  .steps .step .num{display:block;margin:0 0 2px}
}

.form-step{display:none}
.form-step.active{display:block;animation:fadeIn .25s ease forwards}
@keyframes fadeIn{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}

.form-step h3{
  font-family:var(--font-serif);
  font-weight:600;font-size:18px;color:var(--ink);
  margin-bottom:6px;
}
.form-step .hint-2{
  font-size:13px;color:var(--muted);margin-bottom:24px;line-height:1.7;
}

.field-grid{
  display:grid;grid-template-columns:repeat(2,1fr);gap:18px 22px;
}
.field-grid .full{grid-column:1/-1}
@media (max-width:680px){.field-grid{grid-template-columns:1fr;gap:16px}}

.field{display:flex;flex-direction:column;gap:6px}
.field label{
  font-size:13px;color:var(--ink);font-weight:500;
  letter-spacing:.02em;display:flex;align-items:center;gap:6px;
}
.field label .req{color:var(--ys-red);font-weight:600}
.field label .opt{font-size:11px;color:var(--muted);font-weight:400;margin-left:4px}
.field input,.field select,.field textarea{
  width:100%;padding:11px 14px;
  border:1px solid var(--line-2);
  background:#fff;border-radius:2px;
  font-family:inherit;font-size:14.5px;color:var(--ink);
  transition:.15s;
}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--ys-blue);
  box-shadow:0 0 0 3px rgba(0,56,118,.10);
}
.field textarea{min-height:110px;resize:vertical;line-height:1.6}
.field .help{font-size:12px;color:var(--muted);line-height:1.6}
.field .err{font-size:12px;color:var(--ys-red);display:none}
.field.invalid input,.field.invalid select,.field.invalid textarea{border-color:var(--ys-red);background:#fef2f2}
.field.invalid .err{display:block}

.checks{display:flex;flex-wrap:wrap;gap:10px}
.check{
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 14px;
  border:1px solid var(--line-2);
  background:#fff;
  font-size:13px;color:var(--ink);
  cursor:pointer;border-radius:2px;
  transition:.15s;user-select:none;
}
.check input{appearance:none;width:14px;height:14px;border:1px solid var(--line-2);background:#fff;border-radius:1px;position:relative;cursor:pointer}
.check input:checked{background:var(--ys-blue);border-color:var(--ys-blue)}
.check input:checked::after{content:"";position:absolute;left:3px;top:0;width:6px;height:9px;border-right:2px solid #fff;border-bottom:2px solid #fff;transform:rotate(40deg)}
.check:has(input:checked){border-color:var(--ys-blue);background:rgba(0,56,118,.04)}

.consent{
  display:flex;align-items:flex-start;gap:12px;
  padding:16px 18px;
  background:var(--bg-2);
  border:1px solid var(--line);border-left:3px solid var(--ys-blue);
  font-size:13px;line-height:1.7;color:var(--ink-2);
  margin-bottom:14px;
}
.consent input{margin-top:3px;flex-shrink:0;width:16px;height:16px;accent-color:var(--ys-blue);cursor:pointer}
.consent a{color:var(--ys-blue);text-decoration:underline}

.dropzone{
  border:2px dashed var(--line-2);background:var(--bg-2);
  padding:32px 20px;text-align:center;
  cursor:pointer;border-radius:2px;transition:.15s;
}
.dropzone:hover,.dropzone.drag{border-color:var(--ys-blue);background:rgba(0,56,118,.04)}
.dropzone .ico{
  font-family:var(--font-en-display);font-size:30px;color:var(--ys-blue);
  display:block;margin-bottom:10px;font-weight:300;
}
.dropzone .t{font-size:14px;color:var(--ink);font-weight:500;margin-bottom:4px}
.dropzone .h{font-size:12px;color:var(--muted)}
.file-list{margin-top:14px;display:flex;flex-direction:column;gap:6px}
.file-list .file{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:9px 14px;background:#fff;border:1px solid var(--line);
  font-size:13px;border-radius:2px;
}
.file-list .file .name{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.file-list .file .sz{font-size:11.5px;color:var(--muted);font-family:var(--font-en-display)}
.file-list .file .x{
  width:24px;height:24px;border:1px solid var(--line);background:#fff;
  cursor:pointer;color:var(--muted);font-size:14px;border-radius:2px;
  display:inline-flex;align-items:center;justify-content:center;
}
.file-list .file .x:hover{color:var(--ys-red);border-color:var(--ys-red)}

.form-foot{
  display:flex;justify-content:space-between;align-items:center;gap:14px;
  margin-top:36px;padding-top:24px;border-top:1px solid var(--line);
}
.form-foot .step-label{font-size:12px;color:var(--muted);letter-spacing:.18em;text-transform:uppercase;font-family:var(--font-en-display)}
@media (max-width:560px){
  .form-foot{flex-direction:column-reverse;gap:10px}
  .form-foot .btn{width:100%}
}

/* ============================================================
 * Toast
 * ============================================================ */
.toast{
  position:fixed;left:50%;top:24px;
  transform:translate(-50%, -16px);
  background:var(--ink);color:#fff;
  padding:13px 22px;border-radius:2px;
  font-size:13.5px;letter-spacing:.04em;
  z-index:300;opacity:0;pointer-events:none;
  transition:.2s;
  border-left:3px solid var(--ys-blue);
  box-shadow:var(--shadow-lg);
}
.toast.show{transform:translate(-50%,0);opacity:1}
.toast.signal{border-left-color:var(--ys-red)}
.toast.accent{border-left-color:var(--ys-gold)}

/* ============================================================
 * 标签
 * ============================================================ */
.chip{
  display:inline-block;padding:3px 10px;
  font-size:11px;letter-spacing:.06em;
  border:1px solid var(--line-2);color:var(--ink-2);
  margin-right:5px;margin-bottom:5px;border-radius:2px;
}
.chip.blue{color:var(--ys-blue);border-color:var(--ys-blue)}
.chip.gold{color:var(--ys-gold);border-color:var(--ys-gold)}
.chip.solid{background:var(--ys-blue);border-color:var(--ys-blue);color:#fff}

/* ============================================================
 * 文章正文
 * ============================================================ */
.article{font-size:16px;line-height:1.85;color:var(--ink-2)}
.article h2{
  font-family:var(--font-serif);
  font-weight:600;font-size:24px;color:var(--ink);
  margin:48px 0 16px;padding-bottom:10px;border-bottom:2px solid var(--ys-blue);
}
.article h3{
  font-family:var(--font-serif);
  font-weight:600;font-size:18px;color:var(--ink);
  margin:30px 0 12px;
}
.article p{margin-bottom:18px}
.article p strong{color:var(--ys-blue);font-weight:600}
.article ul{margin:14px 0 22px 22px}
.article li{margin-bottom:8px}
.article blockquote{
  margin:24px 0;padding:18px 22px;
  background:var(--bg-2);
  border-left:4px solid var(--ys-blue);
  font-size:15.5px;line-height:1.85;color:var(--ink);
  font-style:italic;
}
.article blockquote::before{
  content:"" "";font-family:var(--font-serif);font-size:18px;color:var(--ys-blue);font-weight:700;
}

/* FAQ */
.faq details{border-bottom:1px solid var(--line);padding:20px 0}
.faq details:first-child{border-top:1px solid var(--line)}
.faq summary{
  cursor:pointer;list-style:none;
  font-size:16px;font-weight:500;color:var(--ink);
  display:flex;justify-content:space-between;align-items:center;gap:18px;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"+";font-family:var(--font-en-display);
  font-size:22px;font-weight:300;color:var(--ys-blue);
  transition:transform .2s;
}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details p{margin-top:14px;font-size:14.5px;line-height:1.85;color:var(--ink-2)}

/* ============================================================
 * 联系方式专用
 * ============================================================ */
.contact-grid{
  display:grid;grid-template-columns:1.1fr .9fr;gap:48px;
}
@media (max-width:880px){.contact-grid{grid-template-columns:1fr;gap:32px}}
.contact-block{padding:22px 0;border-bottom:1px solid var(--line)}
.contact-block:first-child{padding-top:0}
.contact-block:last-child{border-bottom:none}
.contact-block h3{
  font-family:var(--font-serif);font-weight:600;
  font-size:17px;color:var(--ink);
}
.contact-block .ko{
  font-size:11.5px;color:var(--muted);
  letter-spacing:.18em;text-transform:uppercase;margin:4px 0 12px;
  font-weight:500;
}
.contact-block p{font-size:14px;color:var(--ink-2);line-height:1.75}
.contact-block .email{
  display:inline-block;margin-top:8px;
  font-family:var(--font-en-display);font-size:17px;
  color:var(--ys-blue);font-weight:500;
  border-bottom:1px solid var(--ys-blue);
  padding-bottom:1px;
}

/* ============================================================
 * 授权 / 反诈骗
 * ============================================================ */
.auth-banner{
  background:var(--ys-blue);color:#fff;
  padding:32px 28px;
  display:flex;align-items:center;gap:24px;flex-wrap:wrap;
  border-left:6px solid var(--ys-gold);
}
.auth-banner .seal{
  flex-shrink:0;width:90px;height:90px;
  background:var(--ys-gold);color:#fff;
  display:flex;align-items:center;justify-content:center;text-align:center;
  font-family:var(--font-serif);font-weight:600;
  font-size:14px;line-height:1.3;letter-spacing:.04em;
  box-shadow:0 0 0 3px var(--ys-blue),0 0 0 4px var(--ys-gold);
}
.auth-banner h3{
  font-family:var(--font-serif);
  font-size:20px;font-weight:600;
  color:#fff;margin-bottom:6px;
}
.auth-banner p{font-size:13.5px;color:rgba(255,255,255,.85);line-height:1.7}

.auth-doc{
  background:#fff;border:1px solid var(--line);
  padding:36px;margin:28px 0;
}
.auth-doc h3{
  text-align:center;
  font-family:var(--font-serif);font-weight:600;
  font-size:20px;color:var(--ink);margin-bottom:24px;
  padding-bottom:14px;border-bottom:2px solid var(--ys-blue);
}
.auth-doc .body{font-size:14.5px;line-height:1.95;color:var(--ink-2)}
.auth-doc .signature{
  display:grid;grid-template-columns:repeat(3,1fr);gap:24px;
  margin-top:32px;padding-top:20px;border-top:1px dashed var(--line);
  font-size:13px;color:var(--ink);
}
.auth-doc .signature .lbl{font-size:11px;color:var(--muted);letter-spacing:.18em;text-transform:uppercase;margin-bottom:4px;font-weight:500}

/* ============================================================
 * Footer
 * ============================================================ */
.site-footer{
  background:var(--ys-blue-deep);
  color:rgba(255,255,255,.78);
  padding:60px 0 36px;
  margin-top:60px;
}
.site-footer .grid{
  max-width:var(--maxw);margin:0 auto;
  padding:0 var(--pad-x);
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px;
  padding-bottom:42px;border-bottom:1px solid rgba(255,255,255,.12);
}
@media (max-width:880px){.site-footer .grid{grid-template-columns:1fr 1fr;gap:30px}}
@media (max-width:520px){.site-footer .grid{grid-template-columns:1fr}}
.site-footer .brand-block{align-items:flex-start}
.site-footer .brand-mark{background:#fff;color:var(--ys-blue-deep)}
.site-footer .brand-text .ko{color:#fff}
.site-footer .brand-text .en{color:rgba(255,255,255,.55)}
.site-footer .brand-text .cn{color:rgba(255,255,255,.7)}
.site-footer .blurb{
  margin-top:18px;
  font-size:13.5px;line-height:1.85;color:rgba(255,255,255,.65);
  max-width:340px;
}
.site-footer h4{
  font-family:var(--font-serif);font-weight:600;
  font-size:14px;color:#fff;margin-bottom:16px;letter-spacing:.06em;
}
.site-footer ul{list-style:none}
.site-footer li{margin-bottom:8px;font-size:13px}
.site-footer a{color:rgba(255,255,255,.7)}
.site-footer a:hover{color:#fff}

.site-footer .legal{
  max-width:var(--maxw);margin:0 auto;padding:24px var(--pad-x) 0;
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:14px;
  font-size:11.5px;color:rgba(255,255,255,.5);letter-spacing:.05em;
}
.site-footer .legal a{color:rgba(255,255,255,.55)}
.site-footer .legal a:hover{color:rgba(255,255,255,.8)}
.site-footer .legal .auth-mark{padding:4px 10px;border-color:rgba(255,255,255,.4);font-size:10.5px;color:rgba(255,255,255,.7)}

/* 移动端 */
@media (max-width:640px){
  .stats-strip .item{padding:24px 14px}
  .timeline-item{padding:18px 0}
  .form-shell{padding:20px 16px}
}