/* ===== 设计变量：旭日之光主题（深蓝底 + 暖金日出） ===== */
:root {
  --navy-900: #0e1730;
  --navy-800: #14213d;
  --navy-700: #1c2b4a;
  --ink: #1f2733;
  --ink-soft: #4a5568;
  --paper: #fbfcfe;
  --paper-alt: #f3f6fb;
  --gold: #ffb347;
  --gold-deep: #ff8a3d;
  --gold-soft: #ffe1b0;
  --line: #e3e9f2;
  --white: #ffffff;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 14px 40px rgba(14, 23, 48, 0.10);
  --shadow-sm: 0 6px 18px rgba(14, 23, 48, 0.08);
  --maxw: 1140px;
  --font: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
}

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

html { scroll-behavior: smooth; scroll-padding-top: 78px; }

body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== 顶部导航 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(14, 23, 48, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--white); }
.brand-logo { display: inline-flex; }
.brand-logo img { width: 42px; height: 42px; border-radius: 10px; object-fit: cover; }
.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-text strong { font-size: 18px; letter-spacing: 1px; }
.brand-text em { font-style: normal; font-size: 12px; color: var(--gold); letter-spacing: 3px; }

.nav { display: flex; align-items: center; gap: 28px; }
.nav a {
  color: rgba(255, 255, 255, 0.82);
  font-size: 15px;
  transition: color 0.2s ease;
  position: relative;
}
.nav a:not(.nav-cta)::after {
  content: "";
  position: absolute;
  left: 0; bottom: -6px;
  width: 0; height: 2px;
  background: linear-gradient(90deg, var(--gold-deep), var(--gold));
  transition: width 0.25s ease;
}
.nav a:not(.nav-cta):hover { color: var(--white); }
.nav a:not(.nav-cta):hover::after { width: 100%; }
.nav a.is-active { color: var(--gold); }
.nav a.is-active::after { width: 100%; }
.nav-cta {
  padding: 9px 18px;
  border-radius: 999px;
  background: linear-gradient(120deg, var(--gold-deep), var(--gold));
  color: #2a1a05 !important;
  font-weight: 600;
}
.nav-cta:hover { filter: brightness(1.05); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 0;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle span {
  width: 24px; height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: 0.25s;
}

/* ===== Hero ===== */
.hero {
  position: relative;
  overflow: hidden;
  background: url("images/hero-bg.png") center/cover no-repeat;
  color: var(--white);
  padding: 120px 0 110px;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(14, 23, 48, 0.78) 0%, rgba(14, 23, 48, 0.62) 60%, rgba(14, 23, 48, 0.82) 100%);
  pointer-events: none;
}
.hero-glow {
  position: absolute;
  top: -180px; left: 50%;
  transform: translateX(-50%);
  width: 720px; height: 720px;
  background: radial-gradient(circle, rgba(255, 179, 71, 0.18) 0%, rgba(255, 138, 61, 0.04) 45%, transparent 70%);
  pointer-events: none;
  z-index: 1;
}
.hero-inner { position: relative; z-index: 2; text-align: center; }
.eyebrow {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 3px;
  color: var(--gold);
  padding: 6px 14px;
  border: 1px solid rgba(255, 179, 71, 0.4);
  border-radius: 999px;
  margin-bottom: 26px;
}
.hero h1 {
  font-size: clamp(34px, 6vw, 60px);
  line-height: 1.18;
  font-weight: 800;
  letter-spacing: 1px;
}
.hero-sub {
  max-width: 680px;
  margin: 22px auto 0;
  font-size: clamp(15px, 2.2vw, 19px);
  color: rgba(255, 255, 255, 0.78);
}
.hero-actions {
  margin-top: 38px;
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}
.hero-stats {
  margin-top: 56px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.hero-stats li {
  padding: 24px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(4px);
  text-align: left;
}
.hero-stats strong {
  display: block;
  font-size: 18px;
  color: var(--gold);
  letter-spacing: 1px;
}
.hero-stats em {
  display: block;
  font-style: normal;
  font-size: 14px;
  font-weight: 600;
  color: var(--white);
  margin: 6px 0 10px;
}
.hero-stats span {
  display: block;
  font-size: 13.5px;
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.74);
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 28px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.18s ease, filter 0.18s ease, background 0.18s ease;
}
.btn-primary {
  background: linear-gradient(120deg, var(--gold-deep), var(--gold));
  color: #2a1a05;
}
.btn-primary:hover { filter: brightness(1.05); transform: translateY(-1px); }
.btn-ghost {
  background: transparent;
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.4);
}
.btn-ghost:hover { background: rgba(255, 255, 255, 0.08); }

/* ===== 通用 section ===== */
.section { padding: 30px 0; }
#about { padding-bottom: 0; }
.section-alt { background: var(--paper-alt); }
.section-head { max-width: 760px; margin: 0 auto 30px; text-align: center; }
.section-tag {
  font-size: 13px;
  letter-spacing: 2px;
  color: var(--gold-deep);
  font-weight: 600;
}
.section-head h2 {
  font-size: clamp(26px, 4vw, 38px);
  margin: 14px 0 16px;
  color: var(--navy-900);
  letter-spacing: 0.5px;
}
.section-head .research-main-title {
  color: var(--gold-deep);
}
#xiaogang .section-head h2 { white-space: nowrap; }
.section-lead {
  color: var(--ink-soft);
  font-size: 16px;
  text-align: justify;
  word-break: keep-all;
  overflow-wrap: break-word;
  line-height: 1.8;
}
.nowrap { white-space: nowrap; }

/* ===== 公司介绍 ===== */
.about-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}
.about-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px;
  box-shadow: var(--shadow-sm);
}
.about-card h3 { font-size: 19px; color: var(--navy-900); margin-bottom: 12px; }
.about-card p {
  color: var(--ink-soft);
  text-align: justify;
  word-break: keep-all;
  overflow-wrap: break-word;
}
.pill-list { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.pill-list li {
  font-size: 14px;
  padding: 7px 14px;
  border-radius: 999px;
  background: linear-gradient(120deg, var(--gold-soft), #fff);
  color: #8a4b12;
  border: 1px solid var(--gold-soft);
}
.dot-list li {
  position: relative;
  padding-left: 20px;
  margin-top: 10px;
  color: var(--ink-soft);
}
.dot-list li::before {
  content: "";
  position: absolute;
  left: 0; top: 11px;
  width: 7px; height: 7px;
  border-radius: 50%;
  background: linear-gradient(120deg, var(--gold-deep), var(--gold));
}
.dot-list strong { color: var(--navy-900); }

.quote-band {
  margin-top: 30px;
  text-align: center;
  padding: 40px 30px;
  border-radius: var(--radius);
  background: linear-gradient(120deg, rgba(255,138,61,0.10), rgba(255,179,71,0.04));
  border: 1px solid var(--gold-soft);
}
.quote-band blockquote {
  font-size: clamp(19px, 3vw, 26px);
  color: var(--navy-900);
  font-weight: 600;
  line-height: 1.5;
}
.quote-band cite { display: block; margin-top: 14px; color: var(--gold-deep); font-style: normal; }

.about-card .industries { margin-top: 14px; font-size: 14px; color: var(--ink-soft); }
.about-card .industries strong { color: var(--navy-900); }

/* 愿景横幅 */
.vision-banner {
  position: relative;
  z-index: 1;
  overflow: hidden;
  width: 100vw;
  margin: 30px 0;
  margin-left: calc(50% - 50vw);
  min-height: 360px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 48px 40px;
  background-image: url('images/vision-bg.jpg');
  background-size: cover;
  background-position: center;
  color: var(--white);
  text-align: center;
}
.vision-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(135deg, rgba(11,23,46,0.72), rgba(11,23,46,0.45));
}
.vision-label {
  position: relative;
  display: inline-block;
  font-size: 13px;
  letter-spacing: 3px;
  color: var(--gold);
  font-weight: 600;
  margin-bottom: 12px;
}
.vision-text {
  position: relative;
  font-size: clamp(22px, 3.4vw, 34px);
  line-height: 1.5;
  letter-spacing: 0.5px;
  max-width: 860px;
  margin: 0 auto;
  color: var(--white);
  font-weight: 700;
  text-shadow: 0 2px 12px rgba(0,0,0,0.28);
}

/* 核心目的金句 */
.purpose-banner {
  position: relative;
  z-index: 1;
  overflow: hidden;
  width: 100vw;
  margin: 0 0 30px;
  margin-left: calc(50% - 50vw);
  min-height: 360px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 48px 40px;
  background-image: url('images/mission-bg.jpg');
  background-size: cover;
  background-position: center;
}
.purpose-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(135deg, rgba(11,23,46,0.78), rgba(11,23,46,0.42));
}
.purpose-label {
  position: relative;
  font-size: 13px;
  letter-spacing: 3px;
  color: var(--gold);
  font-weight: 600;
}
.purpose-text {
  position: relative;
  margin: 16px auto 0;
  max-width: 860px;
  font-size: clamp(22px, 3.4vw, 34px);
  line-height: 1.5;
  letter-spacing: 0.5px;
  color: var(--white);
  font-weight: 700;
  text-shadow: 0 2px 12px rgba(0,0,0,0.28);
}

/* 荣誉与资质（对标 Awards） */
.creds { margin-top: 30px; }
.creds-title, .books h3 { font-size: 20px; color: var(--navy-900); text-align: center; margin-bottom: 22px; }
.creds-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
}
.cred-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.cred-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.cred-year {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 1px;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--navy-800);
  color: var(--gold);
  margin-bottom: 12px;
}
.cred-card strong { display: block; font-size: 17px; color: var(--navy-900); }
.cred-card p { color: var(--ink-soft); margin-top: 8px; font-size: 14.5px; }

/* 文化与核心价值观（对标 Core Values 图标墙） */
.values-banner {
  position: relative;
  z-index: 1;
  overflow: hidden;
  width: 100vw;
  margin: 0 0 30px;
  margin-left: calc(50% - 50vw);
  min-height: 360px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 48px 40px;
  background-image: url('images/values-bg.jpg');
  background-size: cover;
  background-position: center;
}
.values-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(135deg, rgba(11,23,46,0.76), rgba(11,23,46,0.48));
}
.values-label {
  position: relative;
  display: inline-block;
  font-size: 13px;
  letter-spacing: 3px;
  color: var(--gold);
  font-weight: 600;
  margin-bottom: 12px;
}
.values-text {
  position: relative;
  font-size: clamp(22px, 3.4vw, 34px);
  line-height: 1.5;
  letter-spacing: 0.5px;
  max-width: 860px;
  margin: 0 auto;
  color: var(--white);
  font-weight: 700;
  text-shadow: 0 2px 12px rgba(0,0,0,0.28);
}

/* 小刚老师主视觉（通栏底图） */
.xiaogang-banner {
  position: relative;
  z-index: 1;
  overflow: hidden;
  width: 100vw;
  margin: 0 0 30px;
  margin-left: calc(50% - 50vw);
  min-height: calc(100vh - 68px);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  align-items: center;
  text-align: center;
  padding: 48px 40px 70px;
  background-image: url('images/xiaogang-banner-crop.jpg?v=3');
  background-size: cover;
  background-position: center top;
  color: var(--white);
}
.xiaogang-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(180deg, rgba(11,23,46,0) 0%, rgba(11,23,46,0.15) 50%, rgba(11,23,46,0.62) 100%);
}
.xiaogang-banner .section-head { max-width: 760px; margin: 0 auto; }
.xiaogang-banner .section-tag { color: var(--gold); }
.xiaogang-tag {
  position: absolute;
  top: 28px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
}
.xiaogang-banner h2 { color: var(--white); text-shadow: 0 2px 12px rgba(0,0,0,0.28); }
.xiaogang-banner .section-lead {
  color: rgba(255,255,255,0.88);
  text-align: center;
  text-shadow: 0 1px 8px rgba(0,0,0,0.22);
}

/* 应用体系头图 */
.research-banner {
  width: 100vw;
  margin: 0 0 30px;
  margin-left: calc(50% - 50vw);
  overflow: hidden;
  line-height: 0;
  background: var(--navy-900);
}
.research-banner img {
  width: 100%;
  height: auto;
  display: block;
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  align-items: stretch;
}
.value-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px 28px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}
.value-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: var(--gold-soft); }
.value-icon {
  display: grid;
  place-items: center;
  width: 54px; height: 54px;
  border-radius: 14px;
  margin-bottom: 18px;
  color: #8a4b12;
  background: linear-gradient(135deg, var(--gold-soft), #fff);
  border: 1px solid var(--gold-soft);
}
.value-icon svg { width: 28px; height: 28px; }
.value-card h3 { font-size: 18px; color: var(--navy-900); margin-bottom: 14px; }
.value-card h3 span {
  display: inline-block;
  font-size: 13px;
  color: var(--gold-deep);
  font-weight: 600;
  margin-left: 6px;
}
.value-definition {
  color: var(--ink);
  font-size: 15px;
  line-height: 1.65;
  margin-bottom: 18px;
  text-align: justify;
  word-break: keep-all;
  overflow-wrap: break-word;
}
.value-subtitle {
  font-size: 13px;
  color: var(--gold-deep);
  font-weight: 600;
  margin-bottom: 12px;
}
.value-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.value-list li {
  position: relative;
  padding-left: 18px;
  margin-bottom: 10px;
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.8;
  text-align: left;
  word-break: normal;
  overflow-wrap: break-word;
}
.value-list li::before {
  content: "";
  position: absolute;
  left: 0; top: 9px;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: linear-gradient(120deg, var(--gold-deep), var(--gold));
}

/* Logo 释义 */
/* Logo 释义（通栏底图） */
.logo-banner {
  position: relative;
  z-index: 1;
  width: 100%;
  margin-top: 30px;
  min-height: 440px;
  display: flex;
  align-items: center;
  background-image: url('images/logo-bg.jpg');
  background-size: cover;
  background-position: center;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.logo-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background: linear-gradient(90deg, rgba(11, 23, 46, 0.18) 0%, rgba(11, 23, 46, 0.42) 38%, rgba(11, 23, 46, 0.80) 72%, rgba(11, 23, 46, 0.92) 100%);
}
.logo-banner .container { position: relative; z-index: 1; width: 100%; }
.logo-meaning {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 40px;
  align-items: center;
  padding: 44px 0;
}
.logo-meaning-visual { text-align: center; }
.logo-meaning-visual img {
  width: 100%;
  max-width: 240px;
  border-radius: var(--radius-sm);
  background: #fff;
  padding: 14px;
  box-shadow: var(--shadow);
}
.logo-meaning-text h3 {
  font-size: 22px;
  color: var(--white);
  margin-bottom: 14px;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}
.logo-meaning-text p {
  color: rgba(255, 255, 255, 0.88);
  margin-bottom: 16px;
  font-size: 15px;
  line-height: 1.65;
  text-align: justify;
  word-break: keep-all;
  overflow-wrap: break-word;
}
.logo-meaning-text .dot-list li {
  color: rgba(255, 255, 255, 0.82);
  font-size: 14.5px;
  margin-top: 12px;
}
.logo-meaning-text .dot-list strong { color: var(--gold); }

/* ===== 课程体系 ===== */
.course-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.course-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.course-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.course-no {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 4px;
  color: var(--gold-deep);
  font-weight: 700;
  margin-bottom: 12px;
}
.course-card h3 { font-size: 20px; color: var(--navy-900); margin-bottom: 10px; }
.course-card > p { color: var(--ink-soft); margin-bottom: 16px; }
.theory-note {
  margin-top: 16px;
  font-size: 12.5px;
  line-height: 1.6;
  text-align: left;
  color: #7a8294;
  background: var(--paper-alt);
  border-left: 3px solid var(--gold-soft);
  padding: 12px 14px;
  border-radius: 0 8px 8px 0;
}
.theory-sub {
  margin-top: 4px;
  font-size: 11.5px;
  font-style: italic;
  color: #96a0b3;
}

.ccct-band {
  margin-top: 30px;
  background: var(--navy-800);
  color: var(--white);
  border-radius: var(--radius);
  padding: 36px 30px;
}
.ccct-band h3 { color: var(--white); font-size: 20px; text-align: center; margin-bottom: 24px; }
.ccct-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.ccct-grid div {
  text-align: center;
  padding: 22px 14px;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.08);
}
.ccct-grid span {
  display: inline-grid;
  place-items: center;
  width: 38px; height: 38px;
  margin-bottom: 10px;
  border-radius: 50%;
  font-weight: 700;
  color: #2a1a05;
  background: linear-gradient(120deg, var(--gold-deep), var(--gold));
}
.ccct-grid strong { display: block; font-size: 15px; }
.ccct-grid p { font-size: 13px; color: rgba(255,255,255,0.72); margin-top: 6px; }

/* ===== 研发成果 · 应用体系（手风琴） ===== */
.research-grid {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.research-item {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.research-item:hover { border-color: var(--gold-soft); box-shadow: var(--shadow); }
.research-item.open { border-color: var(--gold-deep); }

.research-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 22px 26px;
  background: none;
  border: 0;
  cursor: pointer;
  text-align: left;
  font-family: inherit;
  color: inherit;
}
.research-index {
  flex: none;
  width: 40px; height: 40px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  font-weight: 700;
  font-size: 15px;
  color: #2a1a05;
  background: linear-gradient(120deg, var(--gold-deep), var(--gold));
}
.research-trigger h3 {
  flex: 0 0 auto;
  max-width: 320px;
  font-size: 18px;
  color: var(--navy-900);
  margin: 0;
  line-height: 1.4;
}
.research-trigger .summary {
  flex: 1 1 auto;
  color: var(--ink-soft);
  font-size: 14.5px;
  margin: 0;
  line-height: 1.5;
}
.research-chevron {
  flex: none;
  width: 22px; height: 22px;
  color: var(--gold-deep);
  transition: transform 0.3s ease;
}
.research-item.open .research-chevron { transform: rotate(180deg); }

.research-panel {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}
.research-panel-inner {
  padding: 4px 26px 28px;
  border-top: 1px dashed var(--line);
}
.research-panel-inner .research-desc {
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.8;
  text-align: left;
  word-break: normal;
  overflow-wrap: break-word;
  margin: 18px 0 0;
}

/* 手风琴详情正文 */
.detail-body { margin-top: 20px; }
.detail-body .detail-h {
  font-size: 15px;
  color: var(--gold-deep);
  font-weight: 600;
  margin: 24px 0 10px;
}
.detail-body .detail-h:first-child { margin-top: 4px; }
.detail-body > p {
  color: var(--ink-soft);
  font-size: 14.5px;
  line-height: 1.8;
  text-align: left;
  word-break: normal;
  overflow-wrap: break-word;
}
.detail-body .value-list { margin: 6px 0 0; }
.detail-body .value-list li { font-size: 14.5px; }
.detail-body .theory-note { margin-top: 12px; }
.detail-body .theory-note p { margin: 0 0 10px; color: #7a8294; }
.detail-body .theory-note p:last-child { margin-bottom: 0; }
.detail-body .theory-note strong { color: var(--ink); }


/* 详情占位框架 */
.detail-placeholder {
  margin-top: 20px;
  background: var(--paper-alt);
  border: 1px dashed var(--gold-soft);
  border-radius: var(--radius-sm);
  padding: 18px 20px;
}
.detail-placeholder .ph-head {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--gold-deep);
  margin-bottom: 14px;
}
.detail-placeholder .ph-head::before {
  content: "";
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--gold-deep);
}
.ph-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}
.ph-item {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
}
.ph-item h4 { font-size: 14px; color: var(--navy-900); margin-bottom: 6px; }
.ph-item p { font-size: 13px; color: #9aa2b1; margin: 0; line-height: 1.55; }

/* ===== 应用体系：前5个模块 + 通栏底图 + 后2个模块 ===== */
.research-grid-top { margin-bottom: 6px; }
.research-grid-bottom { margin-top: 6px; }

/* 左图右模块双栏布局 */
.research-layout {
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 32px;
  align-items: start;
  margin-bottom: 6px;
}
.research-col-left {
  position: relative;
  min-height: 1px;
}
.research-side-figure {
  margin: 0;
  position: sticky;
  top: 96px;
  overflow: hidden;
  border-radius: var(--radius);
  box-shadow: 0 12px 40px rgba(11,23,46,0.18);
  border: 1px solid rgba(212,175,124,0.22);
  background: var(--navy-900);
  height: var(--hui-height, 720px);
}
.research-side-figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center center;
}

/* 下方双栏：左模块 / 右图 */
.research-layout-bottom {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 32px;
  align-items: stretch;
  margin-top: 6px;
}
.research-layout-bottom .research-col-right {
  position: relative;
  min-height: 1px;
  display: flex;
  align-items: stretch;
}
.research-layout-bottom .research-side-figure {
  position: relative;
  top: auto;
  width: 100%;
  height: 100%;
  min-height: 100%;
}
.research-layout-bottom .research-side-figure img {
  object-fit: contain;
  object-position: center top;
}

.research-divider {
  width: 100vw;
  margin: 24px 0 24px calc(50% - 50vw);
  background: #fff;
  overflow: hidden;
  line-height: 0;
}
.research-divider img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 1400px;
  margin: 0 auto;
}

@media (max-width: 1100px) {
  .research-divider { margin: 20px 0 20px calc(50% - 50vw); }
}

.books { margin-top: 28px; }
.books h3 { font-size: 20px; color: var(--navy-900); text-align: center; margin-bottom: 10px; }
.books-intro { text-align: center; color: var(--ink-soft); font-size: 14px; margin-bottom: 26px; }

/* ===== 著作文献卡片（证书清晰可见 + 查看详情按钮） ===== */
.cert-list { display: flex; flex-direction: column; gap: 24px; }
.cert-card {
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 28px;
  align-items: center;
  background: linear-gradient(135deg, var(--paper-alt), #fff);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}
.cert-img {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: #fff;
  box-shadow: 0 6px 18px rgba(11,23,46,0.10);
}
.cert-img img { display: block; width: 100%; height: auto; }
.book-tag {
  display: inline-block;
  font-size: 12px;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--gold-soft);
  color: #8a4b12;
  margin-bottom: 12px;
}
.cert-body strong { display: block; font-size: 18px; color: var(--navy-900); }
.cert-body p {
  color: var(--ink-soft);
  margin-top: 8px;
  font-size: 14.5px;
  text-align: left;
  line-height: 1.9;
  letter-spacing: 0.2px;
  word-break: break-word;
  overflow-wrap: break-word;
}
.book-detail-btn {
  margin-top: 14px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 14px;
  font-weight: 600;
  color: var(--gold-deep);
  background: none;
  border: none;
  padding: 4px 0;
  cursor: pointer;
  transition: gap 0.2s ease, color 0.2s ease;
}
.book-detail-btn:hover { gap: 8px; color: var(--navy-900); }

/* ===== 著作详情（整页浮层，支持图文大图） ===== */
.book-modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: none;
  overflow-y: auto;
  background: #e8eaf0;
}
.book-modal.open { display: block; }
.book-modal-backdrop { display: none; }
.book-modal-dialog {
  position: relative;
  width: min(900px, 100%);
  margin: 0 auto;
  min-height: 100vh;
  background: #fff;
  box-shadow: 0 0 60px rgba(11, 23, 46, 0.18);
  padding: 66px 58px 84px;
  animation: modalIn 0.25s ease;
}
@keyframes modalIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: none; }
}
.book-modal-close {
  position: fixed;
  top: 22px; right: 26px;
  z-index: 1001;
  width: 44px; height: 44px;
  border: none;
  border-radius: 50%;
  background: var(--navy-900);
  color: #fff;
  font-size: 26px;
  line-height: 1;
  cursor: pointer;
  box-shadow: 0 6px 18px rgba(11, 23, 46, 0.25);
  transition: background 0.2s ease, transform 0.2s ease;
}
.book-modal-close:hover { background: var(--gold-deep); transform: rotate(90deg); }
.book-modal-head { margin-bottom: 22px; padding-bottom: 18px; border-bottom: 2px solid var(--line); }
.book-modal-head h3 { font-size: 28px; color: var(--navy-900); margin: 12px 0 0; letter-spacing: 0.5px; }
.book-modal-head .book-tag { margin-bottom: 0; }
.book-modal-body { font-size: 16px; line-height: 1.95; color: var(--ink-soft); }
.book-modal-body .research-desc { margin: 0 0 24px; font-size: 16.5px; }
.book-modal-body p { margin: 0 0 14px; text-align: justify; }
.book-modal-body img { display: block; max-width: 100%; height: auto; border-radius: var(--radius-sm); margin: 18px 0; box-shadow: 0 6px 18px rgba(11, 23, 46, 0.12); }

@media (max-width: 720px) {
  .cert-card { grid-template-columns: 1fr; gap: 16px; padding: 18px; }
  .cert-img { max-width: 100%; }
  .book-modal-dialog { padding: 54px 20px 60px; }
  .book-modal-head h3 { font-size: 22px; }
  .book-modal-close { top: 14px; right: 14px; width: 38px; height: 38px; font-size: 22px; }
}

/* ===== 小刚老师（人物专栏） ===== */
.profile-grid {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 22px;
  margin-bottom: 30px;
}
.profile-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px;
  box-shadow: var(--shadow-sm);
}
.profile-card h3 { font-size: 19px; color: var(--navy-900); margin-bottom: 18px; }
.profile-list { display: grid; grid-template-columns: 1fr 1fr; gap: 4px 22px; }
.profile-list > div {
  display: flex;
  gap: 8px;
  padding: 11px 0;
  border-bottom: 1px dashed var(--line);
  font-size: 14.5px;
}
.profile-list dt { color: var(--gold-deep); font-weight: 600; white-space: nowrap; }
.profile-list dd { color: var(--ink-soft); }
.profile-card--dark { background: var(--navy-800); color: var(--white); border-color: transparent; }
.profile-card--dark h3 { color: var(--white); }
.tag-row { display: flex; flex-direction: column; gap: 11px; }
.tag-row li {
  position: relative;
  padding-left: 18px;
  font-size: 14.5px;
  color: rgba(255,255,255,0.85);
}
.tag-row li::before {
  content: "";
  position: absolute;
  left: 0; top: 9px;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: linear-gradient(120deg, var(--gold-deep), var(--gold));
}
.tag-row li strong { color: var(--gold); font-weight: 600; }
.profile-extra {
  margin-top: 18px;
  font-size: 13px;
  line-height: 1.65;
  color: rgba(255,255,255,0.6);
}

.bio-block {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px;
  box-shadow: var(--shadow-sm);
  margin-top: 30px;
}
.bio-block h3 { font-size: 20px; color: var(--navy-900); margin-bottom: 16px; }
.bio-block > p {
  color: var(--ink-soft);
  margin-bottom: 14px;
  text-align: left;
  line-height: 1.9;
  letter-spacing: 0.2px;
  word-break: keep-all;
  overflow-wrap: break-word;
}
.bio-block > p:last-child { margin-bottom: 0; }
.bio-block strong { color: var(--navy-900); }

/* 心声 */
.voice-block {
  position: relative;
  background: linear-gradient(135deg, #fffefc 0%, #f9f6f0 100%);
  border-left: 4px solid var(--gold);
}
.voice-block::before {
  content: """;
  position: absolute;
  top: 18px;
  right: 22px;
  font-size: 62px;
  line-height: 1;
  color: var(--gold);
  opacity: 0.18;
  font-family: Georgia, serif;
}
.voice-block h3 {
  color: var(--navy-900);
  font-size: 22px;
  letter-spacing: 2px;
}
.voice-block > p {
  text-align: left;
  line-height: 1.95;
  letter-spacing: 0.2px;
}

.edu-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.edu-col {
  background: var(--paper-alt);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 22px;
}
.edu-col h4 { font-size: 16px; color: var(--navy-900); margin-bottom: 10px; }
.edu-col p {
  font-size: 14px;
  color: var(--ink-soft);
  text-align: justify;
  word-break: keep-all;
  overflow-wrap: break-word;
}

.source-note {
  margin-top: 28px;
  font-size: 12.5px;
  color: #9aa2b1;
  text-align: center;
}

.inline-cta {
  margin-top: 26px;
  display: flex;
  justify-content: center;
}

/* ===== 联系方式 ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 30px;
  align-items: stretch;
}
.contact-info {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
}
.contact-info > * { width: 100%; }
.contact-items { flex: 0 0 auto; }
.contact-item { padding: 16px 0; border-bottom: 1px dashed var(--line); }
.contact-item:last-child { border-bottom: 0; }
.ci-label { font-size: 13px; color: var(--gold-deep); letter-spacing: 1px; font-weight: 600; }
.contact-item p { margin-top: 6px; color: var(--ink); font-size: 16px; }
.contact-item a { color: var(--navy-800); border-bottom: 1px solid var(--gold-soft); }
.contact-photo {
  margin-top: auto;
  padding-top: 18px;
}
.contact-photo img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
}

.contact-form {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  height: 100%;
  display: flex;
  flex-direction: column;
}
.field { margin-bottom: 16px; }
.field:last-of-type { flex: 1 1 auto; }
.field:last-of-type textarea { height: 100%; min-height: 120px; }
.contact-form button { align-self: flex-start; }
.field label { display: block; font-size: 14px; color: var(--ink-soft); margin-bottom: 7px; }
.field input, .field textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 15px;
  color: var(--ink);
  background: var(--paper);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.field input:focus, .field textarea:focus {
  outline: 0;
  border-color: var(--gold-deep);
  box-shadow: 0 0 0 3px rgba(255, 138, 61, 0.15);
}
.contact-form .btn { width: 100%; margin-top: 20px; }
.form-tip { margin-top: 12px; font-size: 14px; color: #1a8a4a; min-height: 1em; }
.form-note { margin-top: 14px; font-size: 12.5px; color: #9aa2b1; }

/* ===== 页脚 ===== */
.site-footer {
  background: var(--navy-900);
  color: rgba(255,255,255,0.7);
  padding: 46px 0 32px;
}
.footer-inner { display: flex; flex-direction: column; gap: 18px; text-align: center; }
.footer-brand strong { color: var(--white); font-size: 18px; letter-spacing: 1px; }
.footer-brand p { color: var(--gold); margin-top: 4px; font-size: 14px; }
.footer-nav { display: flex; gap: 26px; justify-content: center; flex-wrap: wrap; }
.footer-nav a { color: rgba(255,255,255,0.72); font-size: 14px; }
.footer-nav a:hover { color: var(--gold); }
.footer-copy { font-size: 13px; color: rgba(255,255,255,0.45); }
.footer-meta { font-size: 13px; color: rgba(255,255,255,0.45); margin: 0; text-align: center; }
.footer-meta a { color: inherit; text-decoration: none; }
.footer-meta a:hover { color: var(--gold); }
.footer-meta .sep { margin: 0 12px; color: rgba(255,255,255,0.25); }

/* ===== 滚动渐显 ===== */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.in { opacity: 1; transform: none; }

/* ===== 响应式 ===== */
@media (max-width: 900px) {
  .about-grid { grid-template-columns: 1fr; }
  .profile-grid, .edu-grid,
  .course-grid, .research-grid,
  .creds-grid, .values-grid { grid-template-columns: 1fr; }
  .hero-stats { grid-template-columns: 1fr; }
  .ccct-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .logo-meaning { grid-template-columns: 1fr; gap: 28px; }
  .logo-meaning-visual img { max-width: 200px; }
  .logo-banner::before { background: linear-gradient(180deg, rgba(11, 23, 46, 0.55) 0%, rgba(11, 23, 46, 0.88) 55%, rgba(11, 23, 46, 0.95) 100%); }
  /* 应用体系：平板/手机双栏变单列，图片在模块上方居中 */
  .research-layout,
  .research-layout-bottom { grid-template-columns: 1fr; gap: 28px; }
  .research-layout .research-col-left,
  .research-layout-bottom .research-col-left,
  .research-layout .research-col-right,
  .research-layout-bottom .research-col-right { order: -1; max-width: 420px; margin: 0 auto; width: 100%; }
  .research-layout-bottom .research-col-left { order: 0; }
  .research-side-figure { position: static; top: auto; height: auto; max-height: 420px; overflow: hidden; }
  .research-side-figure img { width: 100%; max-height: 420px; object-fit: cover; object-position: center top; }
}

@media (max-width: 720px) {
  .research-trigger { flex-wrap: wrap; gap: 12px; padding: 18px 20px; }
  .research-trigger .summary { display: none; }
  .research-trigger h3 { max-width: none; flex: 1 1 100%; }
  .research-index { width: 34px; height: 34px; font-size: 14px; }
  .research-panel-inner { padding: 4px 20px 22px; }
  .ph-grid { grid-template-columns: 1fr; }
  .purpose-banner { min-height: 300px; padding: 38px 24px; }
  .vision-banner { min-height: 300px; padding: 38px 24px; }
  .values-banner { min-height: 300px; padding: 38px 24px; }
  .xiaogang-banner { min-height: calc(100vh - 68px); padding: 38px 24px; }
  #xiaogang .section-head h2 { font-size: clamp(15px, 4.2vw, 26px); }
  .nav { display: none; }
  .profile-list { grid-template-columns: 1fr; }
  .nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 68px; left: 0; right: 0;
    background: var(--navy-900);
    padding: 18px 24px 24px;
    gap: 18px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
  }
  .nav-toggle { display: flex; }
  .nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle.open span:nth-child(2) { opacity: 0; }
  .nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .section { padding: 30px 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ===== 著作文献 Hero 宣传图 ===== */
.books-hero {
  width: 100vw;
  margin-left: calc(50% - 50vw);
  line-height: 0;
  height: calc(100vh - 68px);
  overflow: hidden;
  background: #f5f5f5;
}
.books-hero img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.section-head .books-page-title {
  color: var(--gold-deep);
}

/* ===== FAQ 常见问题 ===== */
.faq-list {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.faq-item {
  background: #fff;
  border: 1px solid rgba(20, 33, 61, 0.10);
  border-radius: 14px;
  padding: 0 22px;
  box-shadow: 0 6px 22px rgba(14, 23, 48, 0.05);
  transition: border-color .2s ease, box-shadow .2s ease;
}
.faq-item[open] {
  border-color: var(--gold-deep);
  box-shadow: 0 10px 30px rgba(255, 138, 61, 0.12);
}
.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 20px 0;
  font-size: 18px;
  font-weight: 600;
  color: var(--navy-900);
  position: relative;
  padding-right: 36px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 26px;
  font-weight: 400;
  color: var(--gold-deep);
  transition: transform .2s ease;
}
.faq-item[open] summary::after {
  content: "\2212";
  transform: translateY(-50%) rotate(180deg);
}
.faq-answer {
  padding: 0 0 22px;
  color: var(--ink-soft);
  line-height: 1.85;
  font-size: 15.5px;
}
.faq-answer p { margin: 0; }
.faq-cta {
  text-align: center;
  margin-top: 34px;
  font-size: 16px;
  color: var(--ink-soft);
}
.faq-cta a {
  color: var(--gold-deep);
  font-weight: 600;
  text-decoration: none;
}
.faq-cta a:hover { text-decoration: underline; }

/* ===== 隐私政策 ===== */
.privacy-content {
  max-width: 860px;
  margin: 0 auto;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 36px 40px;
  box-shadow: var(--shadow-sm);
}
.privacy-meta {
  font-size: 13px;
  color: var(--ink-soft);
  margin-bottom: 22px;
  padding-bottom: 16px;
  border-bottom: 1px dashed var(--line);
}
.privacy-content h3 {
  font-size: 18px;
  color: var(--navy-900);
  margin: 26px 0 12px;
  padding-left: 12px;
  border-left: 3px solid var(--gold);
}
.privacy-content p {
  color: var(--ink-soft);
  font-size: 15.5px;
  line-height: 1.9;
  margin-bottom: 12px;
  text-align: justify;
}
.privacy-list { margin: 0 0 14px; padding: 0; }
.privacy-list li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 8px;
  color: var(--ink-soft);
  font-size: 15.5px;
  line-height: 1.8;
}
.privacy-list li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 12px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gold-deep);
}
.privacy-list strong { color: var(--navy-900); }
.privacy-note {
  margin-top: 20px;
  padding: 14px 16px;
  background: var(--paper-alt);
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--ink-soft);
}
.form-consent {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-top: 24px;
  font-size: 14px;
  color: var(--ink-soft);
}
.form-consent input { margin-top: 4px; width: 16px; height: 16px; flex: 0 0 auto; }
.form-consent a { color: var(--gold-deep); font-weight: 600; }
.form-consent a:hover { text-decoration: underline; }
@media (max-width: 600px) {
  .privacy-content { padding: 26px 20px; }
}

/* ===== 导师页 —— 资质荣誉墙 ===== */
.honors-section { background: var(--bg-light); padding: 0 0 30px; }
.honors-section .section-head { margin: 0 auto 16px; padding-top: 30px; }
.honors-section .section-head h2 { color: var(--navy-900); }
.honors-section .section-head p { color: var(--ink-soft); text-align: center; }

.honors-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 28px;
}

.honor-card {
  background: #fff;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 6px 18px rgba(14, 23, 48, 0.07);
  border-top: 3px solid var(--gold-deep);
  transition: transform .25s ease, box-shadow .25s ease;
}

.honor-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 14px 32px rgba(14, 23, 48, 0.12);
}

.honor-thumb {
  position: relative;
  aspect-ratio: 4 / 3;
  background: #f7f8fb;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 14px;
  box-sizing: border-box;
}

.honor-thumb img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 4px;
}

.honor-title {
  padding: 14px 16px 16px;
  text-align: center;
  font-size: 15px;
  font-weight: 500;
  color: var(--navy-900);
  line-height: 1.45;
}

@media (max-width: 900px) {
  .honors-grid { grid-template-columns: repeat(2, 1fr); gap: 18px; }
}

@media (max-width: 560px) {
  .honors-grid { grid-template-columns: 1fr; }
  .honor-title { font-size: 14px; }
}

.honor-thumb { cursor: zoom-in; }

/* ===== 证书点击放大 lightbox ===== */
.cert-lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 5vh 5vw;
  background: rgba(10, 16, 32, 0.82);
  -webkit-backdrop-filter: blur(3px);
  backdrop-filter: blur(3px);
}
.cert-lightbox.open { display: flex; }
.cert-lightbox-img {
  max-width: 90vw;
  max-height: 88vh;
  width: auto;
  height: auto;
  object-fit: contain;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}
.cert-lightbox-close {
  position: absolute;
  top: 22px;
  right: 28px;
  width: 44px;
  height: 44px;
  border: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
  font-size: 26px;
  line-height: 1;
  cursor: pointer;
  transition: background 0.2s ease;
}
.cert-lightbox-close:hover { background: rgba(255, 255, 255, 0.3); }