/* =========================================================
   上海珈火科技 · 企业官网
   简约科技风 · 深空蓝 + 浅灰 + 白色 · 低饱和度 · 几何线条
   ========================================================= */

:root {
  /* 主色：深空蓝 */
  --c-deep: #13294B;
  --c-deep-2: #0E1F3A;
  --c-blue: #2C5282;
  --c-blue-2: #3D6FB4;
  --c-blue-soft: #EAF0F7;

  /* 中性色 */
  --c-gray: #F5F7FA;
  --c-gray-2: #EDF1F6;
  --c-line: #E2E8F0;
  --c-line-2: #D6DEE9;

  /* 文字 */
  --c-ink: #1A2433;
  --c-ink-2: #5E6B7E;
  --c-ink-3: #98A2B3;

  --c-white: #FFFFFF;

  /* 圆角 */
  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 16px;
  --r-xl: 24px;

  /* 阴影：极轻，保持扁平 */
  --sh-1: 0 1px 2px rgba(15, 31, 58, 0.04), 0 2px 8px rgba(15, 31, 58, 0.04);
  --sh-2: 0 4px 16px rgba(15, 31, 58, 0.06);
  --sh-3: 0 12px 40px rgba(15, 31, 58, 0.10);

  /* 过渡：克制 */
  --t: 0.22s ease;

  --maxw: 1200px;
}

/* ===== Reset ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; font-size: 16px; -webkit-text-size-adjust: 100%; }

body {
  font-family: "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--c-ink);
  background: var(--c-white);
  line-height: 1.7;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, select, textarea { font-family: inherit; font-size: inherit; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding: 0 28px;
  border-radius: var(--r-sm);
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: var(--t);
  white-space: nowrap;
}
.btn svg { width: 16px; height: 16px; }

.btn--primary { background: var(--c-deep); color: #fff; }
.btn--primary:hover { background: var(--c-blue); transform: translateY(-1px); }

.btn--outline { border: 1px solid var(--c-line-2); color: var(--c-ink); background: #fff; }
.btn--outline:hover { border-color: var(--c-deep); color: var(--c-deep); }

.btn--light { background: #fff; color: var(--c-deep); }
.btn--light:hover { background: var(--c-blue-soft); }

.btn--ghost-light { border: 1px solid rgba(255,255,255,0.35); color: #fff; }
.btn--ghost-light:hover { background: rgba(255,255,255,0.12); border-color: rgba(255,255,255,0.6); }

.btn--block { width: 100%; }
.btn--sm { height: 40px; padding: 0 20px; font-size: 0.875rem; }
.btn--lg { height: 54px; padding: 0 36px; font-size: 1rem; }

/* ===== 导航 ===== */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(255,255,255,0.9);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid transparent;
  transition: var(--t);
}
.nav.is-scrolled { border-bottom-color: var(--c-line); box-shadow: var(--sh-1); }

.nav__inner {
  height: 68px; display: flex; align-items: center; justify-content: space-between; gap: 24px;
}
.nav__brand { display: flex; align-items: center; gap: 10px; }
.nav__logo { display: flex; }
.nav__logo-img { height: 34px; width: auto; object-fit: contain; }
.nav__name { font-size: 1.0625rem; font-weight: 700; color: var(--c-deep); letter-spacing: 0.02em; }

.nav__links { display: flex; align-items: center; gap: 4px; }
.nav__link {
  position: relative;
  padding: 8px 14px; font-size: 0.9375rem; font-weight: 500; color: var(--c-ink-2);
  border-radius: var(--r-sm); transition: var(--t);
}
.nav__link:hover { color: var(--c-deep); }
.nav__link.is-active { color: var(--c-deep); font-weight: 600; }
.nav__link.is-active::after {
  content: ""; position: absolute; left: 14px; right: 14px; bottom: 2px;
  height: 2px; background: var(--c-deep); border-radius: 2px;
}

.nav__cta { height: 40px; padding: 0 20px; }

.nav__toggle { display: none; flex-direction: column; gap: 5px; padding: 8px; }
.nav__toggle span { width: 22px; height: 2px; background: var(--c-deep); border-radius: 2px; transition: var(--t); }
.nav__toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__toggle.is-open span:nth-child(2) { opacity: 0; }
.nav__toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===== 区块通用 ===== */
.section { padding: 96px 0; }
.section--alt { background: var(--c-gray); }
.section--deep { background: var(--c-deep); color: #fff; }

.sec-head { max-width: 720px; margin: 0 auto 56px; text-align: center; }
.sec-head--left { text-align: left; margin-left: 0; }
.sec-eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 0.8125rem; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--c-blue-2);
}
.sec-eyebrow::before { content: ""; width: 24px; height: 1px; background: var(--c-blue-2); }
.sec-title { font-size: clamp(1.6rem, 3.2vw, 2.25rem); font-weight: 700; color: var(--c-deep); margin: 14px 0 12px; letter-spacing: -0.01em; line-height: 1.3; }
.sec--deep .sec-title, .section--deep .sec-title { color: #fff; }
.sec-sub { font-size: 1rem; color: var(--c-ink-2); }

/* 网格工具 */
.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: 20px; }

/* ===== 卡片 ===== */
.card {
  background: #fff; border: 1px solid var(--c-line); border-radius: var(--r-lg);
  padding: 32px; transition: var(--t);
}
.card:hover { box-shadow: var(--sh-2); border-color: var(--c-line-2); }

/* 几何角标装饰 */
.card--bracket { position: relative; }
.card--bracket::before, .card--bracket::after {
  content: ""; position: absolute; width: 14px; height: 14px; border: 1.5px solid var(--c-blue-2); opacity: 0; transition: var(--t);
}
.card--bracket::before { top: 14px; left: 14px; border-right: none; border-bottom: none; }
.card--bracket::after { bottom: 14px; right: 14px; border-left: none; border-top: none; }
.card--bracket:hover::before, .card--bracket:hover::after { opacity: 1; }

/* ===== 图标方块 ===== */
.ico {
  width: 52px; height: 52px; border-radius: var(--r-md);
  display: flex; align-items: center; justify-content: center;
  background: var(--c-blue-soft); color: var(--c-blue); flex-shrink: 0;
}
.ico svg { width: 26px; height: 26px; }

/* ===== 页脚 ===== */
.footer { background: var(--c-deep-2); color: rgba(255,255,255,0.62); padding: 64px 0 28px; }
.footer__top { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,0.08); }
.footer__brand .nav__name { color: #fff; }
.footer__desc { font-size: 0.875rem; line-height: 1.8; margin: 16px 0 20px; max-width: 300px; }
.footer__col h4 { color: #fff; font-size: 0.9375rem; font-weight: 600; margin-bottom: 16px; }
.footer__col a { display: block; font-size: 0.875rem; padding: 5px 0; color: rgba(255,255,255,0.55); transition: var(--t); }
.footer__col a:hover { color: #fff; }
.footer__bottom { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; padding-top: 24px; font-size: 0.8125rem; color: rgba(255,255,255,0.4); }
.footer__bottom .tag { color: var(--c-blue-2); }

/* ===== 返回顶部 ===== */
.to-top {
  position: fixed; right: 28px; bottom: 28px; z-index: 900;
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--c-deep); color: #fff; display: flex; align-items: center; justify-content: center;
  box-shadow: var(--sh-2); opacity: 0; visibility: hidden; transform: translateY(8px); transition: var(--t);
}
.to-top.is-show { opacity: 1; visibility: visible; transform: none; }
.to-top:hover { background: var(--c-blue); }

/* ===== 滚动渐显（克制） ===== */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ===== Toast ===== */
.toast {
  position: fixed; left: 50%; bottom: 32px; transform: translateX(-50%) translateY(20px);
  background: var(--c-deep); color: #fff; padding: 13px 24px; border-radius: 50px;
  font-size: 0.875rem; display: flex; align-items: center; gap: 8px;
  box-shadow: var(--sh-3); opacity: 0; visibility: hidden; transition: var(--t); z-index: 2000;
}
.toast.is-show { opacity: 1; visibility: visible; transform: translateX(-50%); }
.toast svg { color: #5BD6A0; }

/* =========================================================
   首页
   ========================================================= */

/* Hero */
.hero { position: relative; padding: 140px 0 80px; background:
  linear-gradient(180deg, #FBFCFE 0%, #fff 100%); overflow: hidden; }
.hero__grid-bg {
  position: absolute; inset: 0;
  background-image: linear-gradient(var(--c-line) 1px, transparent 1px), linear-gradient(90deg, var(--c-line) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 0%, #000 0%, transparent 75%);
  mask-image: radial-gradient(ellipse 70% 60% at 50% 0%, #000 0%, transparent 75%);
  opacity: 0.6;
}
.hero__inner { position: relative; display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 56px; align-items: center; }
.hero__eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 0.8125rem; font-weight: 600; letter-spacing: 0.1em; color: var(--c-blue-2);
  border: 1px solid var(--c-line-2); padding: 6px 14px; border-radius: 50px; margin-bottom: 22px;
}
.hero__title { font-size: clamp(2rem, 4.4vw, 3.25rem); font-weight: 800; line-height: 1.22; letter-spacing: -0.01em; color: var(--c-deep); }
.hero__title .ac { color: var(--c-blue-2); }
.hero__sub { margin: 22px 0 32px; font-size: 1.0625rem; color: var(--c-ink-2); max-width: 520px; }
.hero__actions { display: flex; gap: 14px; flex-wrap: wrap; }

.hero__visual {
  position: relative; aspect-ratio: 4/3.4;
  background: transparent;
  overflow: hidden; display: flex; align-items: center; justify-content: center;
}
.hero__visual::after { content: none; }
.hero__visual-mark { position: relative; z-index: 1; text-align: center; }
.hero__visual-mark .big { font-size: 3.5rem; font-weight: 800; letter-spacing: 0.04em; }
.hero__visual-mark .small { font-size: 0.875rem; letter-spacing: 0.3em; opacity: 0.7; margin-top: 4px; }
.hero__logo { width: 86%; max-width: 340px; height: auto; border-radius: 18px; box-shadow: 0 16px 44px rgba(0,0,0,0.16); }

/* 双业务入口 */
.biz { display: grid; grid-template-columns: 1fr 1fr; gap: 0; border: 1px solid var(--c-line); border-radius: var(--r-xl); overflow: hidden; }
.biz__col { padding: 44px 40px; transition: var(--t); position: relative; }
.biz__col--b { background: var(--c-deep); color: #fff; }
.biz__col--c { background: #fff; }
.biz__tag { display: inline-flex; align-items: center; gap: 8px; font-size: 0.8125rem; font-weight: 600; letter-spacing: 0.08em; padding: 5px 12px; border-radius: 50px; margin-bottom: 18px; }
.biz__col--b .biz__tag { background: rgba(255,255,255,0.12); color: #fff; }
.biz__col--c .biz__tag { background: var(--c-blue-soft); color: var(--c-blue-2); }
.biz__title { font-size: 1.5rem; font-weight: 700; margin-bottom: 8px; }
.biz__col--b .biz__title { color: #fff; }
.biz__lead { font-size: 0.9375rem; margin-bottom: 22px; }
.biz__col--b .biz__lead { color: rgba(255,255,255,0.72); }
.biz__col--c .biz__lead { color: var(--c-ink-2); }
.biz__list { display: flex; flex-direction: column; gap: 10px; margin-bottom: 28px; }
.biz__list li { display: flex; align-items: center; gap: 10px; font-size: 0.9375rem; }
.biz__col--b .biz__list li { color: rgba(255,255,255,0.85); }
.biz__col--c .biz__list li { color: var(--c-ink); }
.biz__list svg { flex-shrink: 0; }
.biz__col--b .biz__list svg { color: #7FA8DB; }
.biz__col--c .biz__list svg { color: var(--c-blue-2); }

/* 核心优势 */
.feat__icon { margin-bottom: 18px; }
.feat__card h3 { font-size: 1.125rem; font-weight: 700; color: var(--c-deep); margin-bottom: 8px; }
.feat__card p { font-size: 0.9375rem; color: var(--c-ink-2); }

/* 精选案例预览 */
.case-prev { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.case-prev__card { border: 1px solid var(--c-line); border-radius: var(--r-lg); overflow: hidden; background: #fff; transition: var(--t); }
.case-prev__card:hover { box-shadow: var(--sh-2); transform: translateY(-2px); }
.case-prev__thumb { height: 168px; position: relative; display: flex; align-items: flex-end; padding: 16px; }
.case-prev__thumb--b { background: linear-gradient(135deg, var(--c-deep), var(--c-blue)); }
.case-prev__thumb--c { background: linear-gradient(135deg, #2C5282, #5B8AC9); }
.case-prev__badge { font-size: 0.75rem; font-weight: 600; color: #fff; background: rgba(0,0,0,0.25); padding: 4px 10px; border-radius: 50px; }
.case-prev__body { padding: 20px; }
.case-prev__body h4 { font-size: 1.0625rem; font-weight: 600; color: var(--c-deep); margin-bottom: 6px; }
.case-prev__body p { font-size: 0.875rem; color: var(--c-ink-2); }

/* 客户 LOGO 墙 */
.logo-wall { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
.logo-wall__item {
  height: 72px; display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--c-line); border-radius: var(--r-md); background: #fff;
  font-size: 0.9375rem; font-weight: 600; color: var(--c-ink-3); transition: var(--t);
}
.logo-wall__item:hover { color: var(--c-deep); border-color: var(--c-line-2); }

/* 底部咨询栏 */
.cta-band { background: var(--c-deep); color: #fff; border-radius: var(--r-xl); padding: 56px 56px; display: flex; align-items: center; justify-content: space-between; gap: 32px; flex-wrap: wrap; }
.cta-band h2 { font-size: 1.6rem; font-weight: 700; margin-bottom: 8px; }
.cta-band p { color: rgba(255,255,255,0.7); font-size: 0.9375rem; }
.cta-band__actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* =========================================================
   内页通用 Hero
   ========================================================= */
.page-hero { padding: 132px 0 64px; background: linear-gradient(180deg, #FBFCFE 0%, #fff 100%); border-bottom: 1px solid var(--c-line); }
.page-hero__inner { max-width: 760px; }
.page-hero .sec-eyebrow { margin-bottom: 16px; }
.page-hero h1 { font-size: clamp(1.8rem, 3.6vw, 2.6rem); font-weight: 800; color: var(--c-deep); line-height: 1.25; letter-spacing: -0.01em; }
.page-hero p { margin-top: 16px; font-size: 1.0625rem; color: var(--c-ink-2); }

/* 面包屑 */
.crumb { font-size: 0.8125rem; color: var(--c-ink-3); margin-bottom: 18px; }
.crumb a:hover { color: var(--c-deep); }

/* =========================================================
   关于珈火页
   ========================================================= */
.about-intro { display: grid; grid-template-columns: 1.4fr 1fr; gap: 48px; align-items: start; }
.about-intro__text p { font-size: 1.0625rem; color: var(--c-ink-2); line-height: 1.9; margin-bottom: 16px; }
.about-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.about-stats__item { border: 1px solid var(--c-line); border-radius: var(--r-md); padding: 24px; background: #fff; }
.about-stats__num { font-size: 2rem; font-weight: 800; color: var(--c-deep); line-height: 1; }
.about-stats__label { font-size: 0.875rem; color: var(--c-ink-2); margin-top: 8px; }

.mv-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.mv-card { border: 1px solid var(--c-line); border-radius: var(--r-lg); padding: 40px; background: #fff; }
.mv-card__tag { font-size: 0.8125rem; font-weight: 600; letter-spacing: 0.1em; color: var(--c-blue-2); margin-bottom: 12px; }
.mv-card h3 { font-size: 1.375rem; font-weight: 700; color: var(--c-deep); margin-bottom: 12px; }
.mv-card p { color: var(--c-ink-2); }

/* 时间轴 */
.timeline { position: relative; padding-left: 28px; }
.timeline::before { content: ""; position: absolute; left: 6px; top: 6px; bottom: 6px; width: 2px; background: var(--c-line-2); }
.tl-item { position: relative; padding-bottom: 36px; }
.tl-item:last-child { padding-bottom: 0; }
.tl-item::before { content: ""; position: absolute; left: -25px; top: 6px; width: 10px; height: 10px; border-radius: 50%; background: var(--c-deep); border: 2px solid #fff; box-shadow: 0 0 0 3px var(--c-blue-soft); }
.tl-year { font-size: 1.125rem; font-weight: 700; color: var(--c-deep); }
.tl-title { font-weight: 600; color: var(--c-ink); margin: 2px 0 4px; }
.tl-desc { font-size: 0.9375rem; color: var(--c-ink-2); }

/* 团队 */
.team-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.team-card { border: 1px solid var(--c-line); border-radius: var(--r-lg); overflow: hidden; background: #fff; transition: var(--t); }
.team-card:hover { box-shadow: var(--sh-2); }
.team-card__avatar { height: 200px; background: linear-gradient(135deg, var(--c-deep), var(--c-blue)); display: flex; align-items: center; justify-content: center; color: #fff; font-size: 2.5rem; font-weight: 700; }
.team-card__body { padding: 20px; }
.team-card__name { font-weight: 700; color: var(--c-deep); }
.team-card__role { font-size: 0.875rem; color: var(--c-blue-2); margin: 2px 0 8px; }
.team-card__bio { font-size: 0.8125rem; color: var(--c-ink-2); }

/* PBL 理念 */
.pbl { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.pbl-card { text-align: left; }
.pbl-card__step { font-size: 0.8125rem; font-weight: 700; color: var(--c-blue-2); letter-spacing: 0.1em; }
.pbl-card h3 { font-size: 1.125rem; font-weight: 700; color: var(--c-deep); margin: 8px 0; }
.pbl-card p { font-size: 0.9375rem; color: var(--c-ink-2); }

/* =========================================================
   ToB 解决方案页
   ========================================================= */
.audience-tags { display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; margin-top: 24px; }
.audience-tags span { font-size: 0.875rem; color: var(--c-ink-2); border: 1px solid var(--c-line-2); padding: 8px 18px; border-radius: 50px; background: #fff; }

.sol-list { display: flex; flex-direction: column; gap: 20px; }
.sol-item { display: grid; grid-template-columns: 64px 1fr auto; gap: 28px; align-items: center; border: 1px solid var(--c-line); border-radius: var(--r-lg); padding: 32px; background: #fff; transition: var(--t); }
.sol-item:hover { box-shadow: var(--sh-2); border-color: var(--c-line-2); }
.sol-item__no { font-size: 1.75rem; font-weight: 800; color: var(--c-blue-soft); line-height: 1; }
.sol-item__body h3 { font-size: 1.25rem; font-weight: 700; color: var(--c-deep); margin-bottom: 8px; }
.sol-item__body p { color: var(--c-ink-2); font-size: 0.9375rem; margin-bottom: 14px; }
.sol-item__points { display: flex; flex-wrap: wrap; gap: 8px; }
.sol-item__points span { font-size: 0.8125rem; color: var(--c-ink); background: var(--c-gray); border: 1px solid var(--c-line); padding: 5px 12px; border-radius: 50px; }
.sol-item__cta { flex-shrink: 0; }

/* =========================================================
   ToC 科创课程页
   ========================================================= */
.course-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.course-card { border: 1px solid var(--c-line); border-radius: var(--r-lg); overflow: hidden; background: #fff; transition: var(--t); display: flex; flex-direction: column; }
.course-card:hover { box-shadow: var(--sh-2); transform: translateY(-2px); }
.course-card__head { padding: 28px 28px 0; }
.course-card__ico { width: 56px; height: 56px; border-radius: var(--r-md); background: var(--c-blue-soft); color: var(--c-blue); display: flex; align-items: center; justify-content: center; margin-bottom: 18px; }
.course-card__ico svg { width: 28px; height: 28px; }
.course-card h3 { font-size: 1.1875rem; font-weight: 700; color: var(--c-deep); }
.course-card__age { font-size: 0.8125rem; color: var(--c-blue-2); font-weight: 600; margin: 4px 0 12px; }
.course-card__body { padding: 0 28px 24px; flex: 1; }
.course-card__body p { font-size: 0.9375rem; color: var(--c-ink-2); }
.course-card__foot { padding: 0 28px 28px; }
.course-card__gain { font-size: 0.8125rem; color: var(--c-ink-3); border-top: 1px dashed var(--c-line); padding-top: 14px; margin-top: auto; }

/* 三阶递进式创意工程师培养体系 */
.sys-adv { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 16px; }
.sys-adv__item { border: 1px solid var(--c-line); border-radius: var(--r-lg); padding: 26px 26px 24px; background: #fff; position: relative; }
.sys-adv__item::before { content: ""; position: absolute; left: 0; top: 22px; bottom: 22px; width: 3px; border-radius: 3px; background: var(--c-blue-2); }
.sys-adv__ico { width: 44px; height: 44px; border-radius: var(--r-md); background: var(--c-blue-soft); color: var(--c-blue); display: flex; align-items: center; justify-content: center; font-size: 1.2rem; font-weight: 700; margin-bottom: 14px; }
.sys-adv__item h4 { font-size: 1.0625rem; color: var(--c-deep); margin-bottom: 8px; }
.sys-adv__item p { font-size: 0.875rem; color: var(--c-ink-2); line-height: 1.75; }

.stage-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 44px; }
.stage-card { border: 1px solid var(--c-line); border-radius: var(--r-lg); background: #fff; padding: 28px; display: flex; flex-direction: column; position: relative; overflow: hidden; transition: var(--t); }
.stage-card:hover { box-shadow: var(--sh-2); transform: translateY(-2px); }
.stage-card::after { content: ""; position: absolute; right: -34px; top: -34px; width: 120px; height: 120px; border: 1px solid var(--c-line); border-radius: 50%; opacity: .55; }
.stage-card__top { display: flex; align-items: center; gap: 14px; margin-bottom: 16px; }
.stage-card__no { font-size: 1.75rem; font-weight: 800; color: var(--c-blue-2); line-height: 1; font-feature-settings: "tnum"; }
.stage-card__name { font-size: 1.0625rem; font-weight: 700; color: var(--c-deep); }
.stage-card__age { font-size: 0.8125rem; color: var(--c-blue-2); font-weight: 600; margin-top: 2px; }
.stage-card__keys { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 18px; }
.stage-card__keys span { font-size: 0.75rem; color: var(--c-blue); background: var(--c-blue-soft); border-radius: 999px; padding: 4px 12px; font-weight: 600; }
.stage-card__block { font-size: 0.875rem; color: var(--c-ink-2); padding: 12px 0; border-top: 1px dashed var(--c-line); }
.stage-card__block:first-of-type { border-top: none; padding-top: 0; }
.stage-card__block b { color: var(--c-deep); margin-right: 6px; }
.stage-card__price { display: flex; align-items: baseline; gap: 8px; margin-top: auto; padding-top: 18px; border-top: 1px solid var(--c-line); }
.stage-card__price span { font-size: 0.8125rem; color: var(--c-ink-3); }
.stage-card__price b { font-size: 1.5rem; font-weight: 800; color: var(--c-deep); font-feature-settings: "tnum"; }
.stage-card__price em { font-size: 0.8125rem; color: var(--c-ink-3); font-style: normal; }

.output-block { margin-top: 48px; border: 1px solid var(--c-line); border-radius: var(--r-lg); background: var(--c-gray); padding: 32px; }
.output-block__title { font-size: 1.125rem; color: var(--c-deep); margin-bottom: 20px; }
.output-grid { display: grid; grid-template-columns: 1fr 1fr 1.4fr; gap: 20px; }
.output-col { background: #fff; border: 1px solid var(--c-line); border-radius: var(--r-md); padding: 20px; }
.output-col__head { font-size: 0.9375rem; font-weight: 700; color: var(--c-deep); margin-bottom: 12px; padding-bottom: 10px; border-bottom: 2px solid var(--c-blue-soft); }
.output-col ul { display: flex; flex-direction: column; gap: 9px; }
.output-col li { font-size: 0.875rem; color: var(--c-ink-2); padding-left: 18px; position: relative; }
.output-col li::before { content: ""; position: absolute; left: 4px; top: 11px; width: 6px; height: 6px; border-radius: 50%; background: var(--c-blue-2); }
.output-sub { font-size: 0.875rem; color: var(--c-ink-2); padding: 9px 0; }
.output-sub b { color: var(--c-deep); margin-right: 4px; }
.output-note { font-size: 0.8125rem; color: var(--c-blue-2); background: var(--c-blue-soft); border-radius: var(--r-sm); padding: 11px 12px; margin-top: 12px; font-weight: 600; line-height: 1.6; }

/* 学员作品 */
.work-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.work-item { aspect-ratio: 1; border-radius: var(--r-md); overflow: hidden; position: relative; display: flex; align-items: flex-end; padding: 14px; color: #fff; }
.work-item span { font-size: 0.875rem; font-weight: 600; position: relative; z-index: 1; }
.work-item::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 40%, rgba(14,31,58,0.7)); }
.work-1 { background: linear-gradient(135deg, #13294B, #2C5282); }
.work-2 { background: linear-gradient(135deg, #2C5282, #3D6FB4); }
.work-3 { background: linear-gradient(135deg, #1E3A5F, #4A7AB5); }
.work-4 { background: linear-gradient(135deg, #0E1F3A, #3D6FB4); }

/* 师资 */
.teacher-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.teacher-card { display: flex; gap: 16px; align-items: center; border: 1px solid var(--c-line); border-radius: var(--r-lg); padding: 20px; background: #fff; }
.teacher-card__avatar { width: 56px; height: 56px; border-radius: 50%; background: linear-gradient(135deg, var(--c-deep), var(--c-blue)); color: #fff; display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 1.25rem; flex-shrink: 0; }
.teacher-card__name { font-weight: 700; color: var(--c-deep); }
.teacher-card__role { font-size: 0.8125rem; color: var(--c-blue-2); }
.teacher-card__bio { font-size: 0.8125rem; color: var(--c-ink-2); margin-top: 4px; }

/* =========================================================
   案例展示页
   ========================================================= */
.tabs { display: inline-flex; background: var(--c-gray); border-radius: 50px; padding: 4px; margin: 0 auto 40px; }
.tabs__btn { padding: 10px 28px; border-radius: 50px; font-size: 0.9375rem; font-weight: 600; color: var(--c-ink-2); transition: var(--t); }
.tabs__btn.is-active { background: #fff; color: var(--c-deep); box-shadow: var(--sh-1); }
.tabs-wrap { text-align: center; }

.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.case-card { border: 1px solid var(--c-line); border-radius: var(--r-lg); overflow: hidden; background: #fff; transition: var(--t); }
.case-card:hover { box-shadow: var(--sh-2); transform: translateY(-2px); }
.case-card__thumb { height: 180px; position: relative; display: flex; align-items: flex-end; padding: 16px; }
.case-card__thumb--b { background: linear-gradient(135deg, var(--c-deep), var(--c-blue)); }
.case-card__thumb--c { background: linear-gradient(135deg, #2C5282, #5B8AC9); }
.case-card__cat { font-size: 0.75rem; font-weight: 600; color: #fff; background: rgba(0,0,0,0.28); padding: 4px 12px; border-radius: 50px; }
.case-card__body { padding: 22px; }
.case-card__body h4 { font-size: 1.0625rem; font-weight: 600; color: var(--c-deep); margin-bottom: 8px; }
.case-card__body p { font-size: 0.875rem; color: var(--c-ink-2); }
.case-card__meta { margin-top: 14px; padding-top: 14px; border-top: 1px solid var(--c-line); font-size: 0.8125rem; color: var(--c-ink-3); display: flex; gap: 16px; }

/* =========================================================
   新闻动态页
   ========================================================= */
.news-list { display: flex; flex-direction: column; gap: 1px; border: 1px solid var(--c-line); border-radius: var(--r-lg); overflow: hidden; background: var(--c-line); }
.news-item { display: grid; grid-template-columns: 120px 1fr auto; gap: 24px; align-items: center; padding: 24px 28px; background: #fff; transition: var(--t); }
.news-item:hover { background: var(--c-gray); }
.news-item__date { font-size: 0.8125rem; color: var(--c-ink-3); }
.news-item__date b { display: block; font-size: 1.5rem; font-weight: 800; color: var(--c-deep); line-height: 1; }
.news-item__cat { display: inline-block; font-size: 0.75rem; font-weight: 600; color: var(--c-blue-2); background: var(--c-blue-soft); padding: 3px 10px; border-radius: 50px; margin-bottom: 6px; }
.news-item__title { font-size: 1.0625rem; font-weight: 600; color: var(--c-deep); margin-bottom: 4px; }
.news-item__excerpt { font-size: 0.875rem; color: var(--c-ink-2); }
.news-item__arrow { color: var(--c-ink-3); transition: var(--t); }
.news-item:hover .news-item__arrow { color: var(--c-deep); transform: translateX(3px); }

.news-pager { display: flex; justify-content: center; gap: 8px; margin-top: 40px; }
.news-pager a { width: 40px; height: 40px; display: flex; align-items: center; justify-content: center; border: 1px solid var(--c-line); border-radius: var(--r-sm); font-size: 0.875rem; color: var(--c-ink-2); transition: var(--t); }
.news-pager a:hover, .news-pager a.is-active { background: var(--c-deep); color: #fff; border-color: var(--c-deep); }

/* =========================================================
   联系我们页
   ========================================================= */
.contact-grid { display: grid; grid-template-columns: 1fr 1.3fr; gap: 48px; align-items: start; }
.contact-info__item { display: flex; gap: 16px; padding: 20px 0; border-bottom: 1px solid var(--c-line); }
.contact-info__item:last-child { border-bottom: none; }
.contact-info__item .ico { width: 44px; height: 44px; }
.contact-info__item .ico svg { width: 20px; height: 20px; }
.contact-info__label { font-size: 0.8125rem; color: var(--c-ink-3); }
.contact-info__val { font-size: 0.9375rem; color: var(--c-ink); font-weight: 500; }

.contact-map { height: 220px; border: 1px solid var(--c-line); border-radius: var(--r-lg); margin-top: 24px; background:
  repeating-linear-gradient(45deg, #EDF1F6 0 12px, #F5F7FA 12px 24px);
  display: block; position: relative; overflow: hidden; }
.contact-map::before { content: ""; position: absolute; width: 14px; height: 14px; border-radius: 50%; background: var(--c-deep); box-shadow: 0 0 0 5px rgba(19,41,75,0.18); top: 42%; left: 50%; transform: translate(-50%,-50%); }
.contact-map::after { content: "上海市闵行区 满天星生活广场5号楼3楼"; position: absolute; top: calc(42% + 20px); left: 50%; transform: translateX(-50%); font-size: 0.8125rem; color: var(--c-deep); font-weight: 600; text-align: center; width: 92%; line-height: 1.5; }
.contact-map__link { position: absolute; right: 14px; bottom: 14px; font-size: 0.8125rem; color: #fff; background: var(--c-deep); padding: 7px 14px; border-radius: 999px; text-decoration: none; font-weight: 600; transition: var(--t); }
.contact-map__link:hover { background: #23456f; }

/* 双通道 */
.channel-tabs { display: flex; gap: 8px; margin-bottom: 24px; }
.channel-tabs__btn { flex: 1; padding: 14px; border: 1px solid var(--c-line-2); border-radius: var(--r-md); font-weight: 600; font-size: 0.9375rem; color: var(--c-ink-2); transition: var(--t); }
.channel-tabs__btn.is-active { background: var(--c-deep); color: #fff; border-color: var(--c-deep); }

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field { margin-bottom: 16px; }
.field--full { grid-column: 1 / -1; }
.field label { display: block; font-size: 0.875rem; font-weight: 500; color: var(--c-ink); margin-bottom: 7px; }
.field label .req { color: #D9534F; }
.field input, .field select, .field textarea {
  width: 100%; padding: 11px 14px; border: 1px solid var(--c-line-2); border-radius: var(--r-sm);
  font-size: 0.9375rem; color: var(--c-ink); background: #fff; transition: var(--t); outline: none;
}
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--c-blue-2); box-shadow: 0 0 0 3px var(--c-blue-soft); }
.field textarea { resize: vertical; min-height: 90px; }
.form-note { font-size: 0.75rem; color: var(--c-ink-3); margin-top: 12px; text-align: center; }
.form-note a { color: var(--c-blue-2); }

/* =========================================================
   响应式
   ========================================================= */
@media (max-width: 1024px) {
  .hero__inner { grid-template-columns: 1fr; gap: 40px; }
  .hero__visual { max-width: 460px; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .team-grid { grid-template-columns: repeat(2, 1fr); }
  .work-grid { grid-template-columns: repeat(2, 1fr); }
  .course-grid { grid-template-columns: repeat(2, 1fr); }
  .case-grid { grid-template-columns: repeat(2, 1fr); }
  .about-intro { grid-template-columns: 1fr; gap: 32px; }
  .pbl { grid-template-columns: 1fr; }
  .teacher-row { grid-template-columns: 1fr; }
  .logo-wall { grid-template-columns: repeat(3, 1fr); }
  .footer__top { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; gap: 32px; }
}

@media (max-width: 768px) {
  .section { padding: 64px 0; }
  .nav__links {
    position: fixed; top: 68px; left: 0; right: 0; background: #fff;
    flex-direction: column; align-items: stretch; gap: 0; padding: 12px 24px 20px;
    border-bottom: 1px solid var(--c-line); box-shadow: var(--sh-2);
    transform: translateY(-120%); opacity: 0; visibility: hidden; transition: var(--t);
  }
  .nav__links.is-open { transform: none; opacity: 1; visibility: visible; }
  .nav__link { padding: 12px 8px; }
  .nav__link.is-active::after { display: none; }
  .nav__cta { display: none; }
  .nav__toggle { display: flex; }

  .grid-2, .grid-3, .mv-grid, .course-grid, .case-grid, .case-prev, .sys-adv, .stage-grid, .output-grid { grid-template-columns: 1fr; }
  .grid-4, .team-grid, .work-grid { grid-template-columns: repeat(2, 1fr); }
  .form-grid { grid-template-columns: 1fr; }
  .logo-wall { grid-template-columns: repeat(2, 1fr); }
  .footer__top { grid-template-columns: 1fr; gap: 28px; }
  .footer__bottom { flex-direction: column; align-items: flex-start; }

  .biz { grid-template-columns: 1fr; }
  .sol-item { grid-template-columns: 1fr; gap: 16px; }
  .sol-item__no { display: none; }
  .sol-item__cta { width: 100%; }
  .sol-item__cta .btn { width: 100%; }

  .cta-band { padding: 36px 28px; }
  .cta-band__actions { width: 100%; }
  .cta-band__actions .btn { flex: 1; }

  .news-item { grid-template-columns: 1fr; gap: 8px; }
  .news-item__arrow { display: none; }

  .about-stats { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 480px) {
  .hero { padding: 120px 0 56px; }
  .grid-4, .team-grid, .work-grid { grid-template-columns: 1fr; }
  .hero__actions .btn { width: 100%; }
  .cta-band__actions .btn { width: 100%; }
}