/* ==========================================================================
   赛蜂学堂 · SellerBee Academy — Homepage Stylesheet
   Brand: 赛力比智能科技（苏州）有限公司
   Domain: sellerbee.cn
   ========================================================================== */

/* ===================== VARIABLES ===================== */
:root {
  --c-primary: #0B1F3A;       /* 深藏青 — 主色 */
  --c-primary-dark: #061428;
  --c-primary-light: #1A3A6B;
  --c-accent: #C62828;        /* 砖红 — 强调色 */
  --c-accent-dark: #8E1B1B;
  --c-gold: #FFD700;          /* 金色 — 高亮 */
  --c-gold-soft: #FFC83D;
  --c-blue: #1565C0;
  --c-green: #2E7D32;
  --c-orange: #FB8C00;
  --c-red-light: #E53935;

  --c-text: #1A1A1A;
  --c-text-soft: #555555;
  --c-text-muted: #888888;
  --c-border: #E5E8EE;
  --c-bg: #FFFFFF;
  --c-bg-soft: #F5F7FA;
  --c-bg-dark: #0B1F3A;

  --shadow-sm: 0 2px 8px rgba(11, 31, 58, 0.06);
  --shadow-md: 0 8px 24px rgba(11, 31, 58, 0.10);
  --shadow-lg: 0 16px 48px rgba(11, 31, 58, 0.14);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --container: 1200px;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);

  --font-cn: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Source Han Sans SC",
             "Noto Sans CJK SC", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif;
}

/* ===================== RESET ===================== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-cn);
  font-size: 16px;
  line-height: 1.65;
  color: var(--c-text);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
img, svg { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: color var(--transition); }
button { font-family: inherit; cursor: pointer; border: 0; background: transparent; }
ul { list-style: none; padding: 0; margin: 0; }
h1, h2, h3, h4, h5 { margin: 0; line-height: 1.3; font-weight: 700; }
p { margin: 0; }

/* ===================== LAYOUT HELPERS ===================== */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===================== BUTTONS ===================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  white-space: nowrap;
  transition: all var(--transition);
  border: 2px solid transparent;
  cursor: pointer;
}
.btn-lg { padding: 14px 28px; font-size: 16px; }
.btn-block { width: 100%; }

.btn-primary {
  background: var(--c-primary);
  color: #fff;
}
.btn-primary:hover {
  background: var(--c-primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: var(--c-accent);
  color: #fff;
}
.btn-secondary:hover {
  background: var(--c-accent-dark);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--c-primary);
  border-color: var(--c-primary);
}
.btn-outline:hover {
  background: var(--c-primary);
  color: #fff;
}

.btn-outline-white {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.6);
}
.btn-outline-white:hover {
  background: #fff;
  color: var(--c-primary);
}

.btn-ghost {
  background: transparent;
  color: var(--c-primary);
}
.btn-ghost:hover {
  background: var(--c-bg-soft);
}

.btn-gold {
  background: var(--c-gold);
  color: var(--c-primary);
  border-color: var(--c-gold);
}
.btn-gold:hover {
  background: var(--c-gold-soft);
  transform: translateY(-1px);
  box-shadow: 0 16px 32px rgba(255, 215, 0, 0.3);
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  color: var(--c-primary);
  transition: background var(--transition);
}
.icon-btn:hover { background: var(--c-bg-soft); }

/* ===================== TOP NOTIFICATION BAR ===================== */
.topbar {
  background: linear-gradient(90deg, var(--c-primary) 0%, var(--c-primary-light) 100%);
  color: #fff;
  font-size: 14px;
  position: relative;
  z-index: 100;
}
.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 8px 24px;
  position: relative;
}
.topbar-text { font-weight: 500; }
.topbar-link {
  color: var(--c-gold);
  font-weight: 600;
}
.topbar-link:hover { text-decoration: underline; }
.topbar-close {
  position: absolute;
  right: 16px;
  color: rgba(255, 255, 255, 0.7);
  font-size: 20px;
  line-height: 1;
}
.topbar-close:hover { color: #fff; }

/* ===================== HEADER ===================== */
.header {
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--c-border);
  position: sticky;
  top: 0;
  z-index: 99;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: 68px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-img {
  height: 48px;
  width: auto;
  display: block;
}
.logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}
.logo-text strong {
  font-size: 18px;
  color: var(--c-primary);
  letter-spacing: 0.5px;
}
.logo-text em {
  font-size: 11px;
  color: var(--c-text-muted);
  font-style: normal;
  font-weight: 500;
  letter-spacing: 1px;
}

.nav-main {
  flex: 1;
  display: flex;
  justify-content: center;
}
.nav-main ul {
  display: flex;
  gap: 4px;
}
.nav-main a {
  display: block;
  padding: 8px 14px;
  font-size: 15px;
  font-weight: 500;
  color: var(--c-text-soft);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}
.nav-main a:hover { color: var(--c-primary); background: var(--c-bg-soft); }
.nav-main a.active { color: var(--c-primary); font-weight: 700; }

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.menu-btn {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 24px;
  height: 18px;
  padding: 0;
}
.menu-btn span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--c-primary);
  border-radius: 2px;
  transition: all var(--transition);
}

/* Mobile Nav */
.nav-mobile {
  border-top: 1px solid var(--c-border);
  background: #fff;
  padding: 16px 24px 24px;
}
.nav-mobile ul {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 16px;
}
.nav-mobile a {
  display: block;
  padding: 12px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--c-text-soft);
  border-radius: var(--radius-sm);
}
.nav-mobile a.active {
  color: var(--c-primary);
  background: var(--c-bg-soft);
  font-weight: 700;
}
.nav-mobile-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

/* ===================== HERO ===================== */
.hero {
  position: relative;
  padding: 80px 0 60px;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero-bg-grad {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 800px 600px at 80% -10%, rgba(255, 215, 0, 0.15), transparent 60%),
    radial-gradient(ellipse 600px 400px at 0% 100%, rgba(198, 40, 40, 0.10), transparent 60%),
    linear-gradient(180deg, #fff 0%, var(--c-bg-soft) 100%);
}
.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(11, 31, 58, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(11, 31, 58, 0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(ellipse 800px 600px at 50% 50%, #000 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 800px 600px at 50% 50%, #000 30%, transparent 80%);
}

.hero-inner {
  position: relative;
  z-index: 1;
  text-align: center;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(11, 31, 58, 0.06);
  color: var(--c-primary);
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 24px;
}
.hero-tag .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c-green);
  box-shadow: 0 0 0 4px rgba(46, 125, 50, 0.2);
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 900;
  margin-bottom: 16px;
}
.hero-title-cn {
  display: block;
  color: var(--c-primary);
  letter-spacing: 4px;
}
.hero-title-en {
  display: block;
  font-size: 0.32em;
  font-weight: 600;
  color: var(--c-text-muted);
  letter-spacing: 4px;
  margin-top: 8px;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--c-text-soft);
  margin-bottom: 8px;
}
.hero-promise {
  font-size: 16px;
  color: var(--c-text-muted);
  margin-bottom: 32px;
}
.hero-divider {
  display: inline-block;
  margin: 0 12px;
  color: var(--c-border);
}

.hero-search {
  max-width: 680px;
  margin: 0 auto 16px;
  position: relative;
  display: flex;
  align-items: center;
  background: #fff;
  border: 2px solid var(--c-border);
  border-radius: 999px;
  padding: 6px 6px 6px 20px;
  box-shadow: var(--shadow-md);
  transition: all var(--transition);
}
.hero-search:focus-within {
  border-color: var(--c-primary);
  box-shadow: 0 8px 32px rgba(11, 31, 58, 0.16);
}
.hero-search-icon {
  color: var(--c-text-muted);
  display: flex;
  align-items: center;
}
.hero-search input {
  flex: 1;
  border: 0;
  outline: 0;
  font: inherit;
  font-size: 15px;
  padding: 12px 16px;
  background: transparent;
  color: var(--c-text);
}
.hero-search-btn {
  background: var(--c-primary);
  color: #fff;
  font-weight: 600;
  padding: 10px 24px;
  border-radius: 999px;
  font-size: 14px;
  transition: background var(--transition);
}
.hero-search-btn:hover { background: var(--c-primary-dark); }

.hero-search-tags {
  max-width: 680px;
  margin: 0 auto 36px;
  font-size: 13px;
  color: var(--c-text-muted);
}
.hero-search-tags a {
  color: var(--c-primary);
  margin: 0 6px;
  padding: 2px 8px;
  border-radius: 4px;
  background: rgba(11, 31, 58, 0.05);
  transition: all var(--transition);
}
.hero-search-tags a:hover {
  background: var(--c-primary);
  color: #fff;
}

.hero-cta {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 56px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  max-width: 760px;
  margin: 0 auto;
  padding-top: 32px;
  border-top: 1px solid var(--c-border);
}
.hero-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
}
.hero-stat strong {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 800;
  color: var(--c-primary);
}
.hero-stat span {
  font-size: 13px;
  color: var(--c-text-muted);
  margin-top: 4px;
}

/* ===================== SECTION COMMON ===================== */
.section {
  padding: 80px 0;
}
.section-light {
  background: var(--c-bg-soft);
}

.section-head {
  text-align: center;
  margin-bottom: 48px;
}
.section-eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--c-accent);
  text-transform: uppercase;
  margin-bottom: 12px;
}
.section-title {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  color: var(--c-primary);
  margin-bottom: 12px;
}
.section-desc {
  font-size: 16px;
  color: var(--c-text-soft);
  max-width: 720px;
  margin: 0 auto;
}
.section-cta {
  text-align: center;
  margin-top: 40px;
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

/* ===================== 7 STEPS ===================== */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-top: 32px;
}
.step-card {
  position: relative;
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  transition: all var(--transition);
  overflow: hidden;
}
.step-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--c-primary);
  transform: scaleY(0);
  transition: transform var(--transition);
  transform-origin: bottom;
}
.step-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
}
.step-card:hover::before { transform: scaleY(1); }
.step-card:nth-child(3n+1)::before { background: var(--c-accent); }
.step-card:nth-child(3n+2)::before { background: var(--c-blue); }

.step-num {
  font-size: 14px;
  font-weight: 800;
  color: var(--c-gold);
  letter-spacing: 2px;
  margin-bottom: 12px;
}
.step-card h3 {
  font-size: 18px;
  color: var(--c-primary);
  margin-bottom: 8px;
}
.step-card p {
  font-size: 14px;
  color: var(--c-text-soft);
  line-height: 1.6;
  margin-bottom: 16px;
}
.step-time {
  display: inline-block;
  font-size: 12px;
  color: var(--c-text-muted);
  padding: 3px 10px;
  background: var(--c-bg-soft);
  border-radius: 999px;
}

/* ===================== COURSES ===================== */
.courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}
.course-card {
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: pointer;
  transition: all var(--transition);
}
.course-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
}
.course-thumb {
  position: relative;
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, var(--c-primary) 0%, var(--c-primary-light) 100%);
  overflow: hidden;
}
.course-card:nth-child(2) .course-thumb { background: linear-gradient(135deg, var(--c-accent) 0%, #ff6f6f 100%); }
.course-card:nth-child(3) .course-thumb { background: linear-gradient(135deg, var(--c-blue) 0%, #42a5f5 100%); }
.course-card:nth-child(4) .course-thumb { background: linear-gradient(135deg, var(--c-green) 0%, #66bb6a 100%); }
.course-card:nth-child(5) .course-thumb { background: linear-gradient(135deg, var(--c-orange) 0%, #ffb74d 100%); }
.course-card:nth-child(6) .course-thumb { background: linear-gradient(135deg, #6a1b9a 0%, #ab47bc 100%); }

.thumb-tag {
  position: absolute;
  top: 12px;
  left: 12px;
  background: rgba(255, 255, 255, 0.95);
  color: var(--c-primary);
  font-size: 12px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 4px;
  backdrop-filter: blur(4px);
}
.thumb-play {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 56px;
  height: 56px;
  background: rgba(255, 255, 255, 0.95);
  color: var(--c-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  padding-left: 4px;
  transition: all var(--transition);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}
.course-card:hover .thumb-play {
  background: var(--c-gold);
  transform: translate(-50%, -50%) scale(1.1);
}
.thumb-time {
  position: absolute;
  bottom: 12px;
  right: 12px;
  background: rgba(0, 0, 0, 0.6);
  color: #fff;
  font-size: 12px;
  padding: 2px 8px;
  border-radius: 4px;
}

.course-body {
  padding: 16px;
}
.course-body h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--c-text);
  margin-bottom: 8px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.course-meta {
  font-size: 12px;
  color: var(--c-text-muted);
  display: flex;
  gap: 6px;
  align-items: center;
}
.meta-level {
  background: rgba(11, 31, 58, 0.08);
  color: var(--c-primary);
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 600;
}

/* ===================== HELP / FAQ ===================== */
.help-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}
.help-card {
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  padding: 24px 20px;
  display: block;
  transition: all var(--transition);
}
.help-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--c-primary);
}
.help-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--c-primary) 0%, var(--c-primary-light) 100%);
  border-radius: var(--radius-sm);
  font-size: 24px;
  margin-bottom: 16px;
}
.help-card h4 {
  font-size: 16px;
  color: var(--c-primary);
  margin-bottom: 8px;
}
.help-card p {
  font-size: 13px;
  color: var(--c-text-soft);
}

/* ===================== Q&A ===================== */
.qa-list {
  max-width: 880px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.qa-item {
  display: flex;
  gap: 16px;
  padding: 20px 24px;
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  transition: all var(--transition);
}
.qa-item:hover {
  border-color: var(--c-primary);
  box-shadow: var(--shadow-sm);
}
.qa-status {
  flex-shrink: 0;
  width: 88px;
  height: 88px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  text-align: center;
  line-height: 1.2;
}
.qa-solved {
  background: rgba(46, 125, 50, 0.1);
  color: var(--c-green);
}
.qa-official-badge {
  background: rgba(11, 31, 58, 0.08);
  color: var(--c-primary);
}
.qa-main {
  flex: 1;
  min-width: 0;
}
.qa-main h3 a {
  font-size: 16px;
  font-weight: 600;
  color: var(--c-text);
  display: block;
  margin-bottom: 8px;
  transition: color var(--transition);
}
.qa-main h3 a:hover { color: var(--c-primary); }
.qa-main p {
  font-size: 14px;
  color: var(--c-text-soft);
  margin-bottom: 12px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.qa-meta {
  font-size: 12px;
  color: var(--c-text-muted);
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}
.qa-tag {
  background: rgba(11, 31, 58, 0.06);
  color: var(--c-primary);
  padding: 2px 10px;
  border-radius: 999px;
  font-weight: 500;
}
.qa-official {
  color: var(--c-accent);
  font-weight: 600;
}

/* ===================== WEEKLY DIAGNOSTIC ===================== */
.weekly-card {
  max-width: 880px;
  margin: 0 auto;
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--c-border);
}
.weekly-header {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  color: var(--c-text-muted);
  margin-bottom: 16px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--c-border);
}
.weekly-author {
  font-weight: 600;
  color: var(--c-primary);
}

.weekly-topic {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
}
.topic-keyword {
  display: inline-block;
  background: var(--c-accent);
  color: #fff;
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
}
.weekly-topic h3 {
  font-size: 24px;
  color: var(--c-primary);
}

.weekly-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 28px;
}
.weekly-metric {
  padding: 16px;
  background: var(--c-bg-soft);
  border-radius: var(--radius-sm);
  text-align: center;
}
.metric-label {
  display: block;
  font-size: 13px;
  color: var(--c-text-muted);
  margin-bottom: 8px;
}
.metric-value {
  display: block;
  font-size: 18px;
  font-weight: 700;
  color: var(--c-primary);
}

.weekly-verdict {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
}
.verdict-item {
  flex: 1;
  padding: 16px 20px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  gap: 12px;
}
.verdict-watch {
  background: rgba(251, 140, 0, 0.08);
  border: 1px solid rgba(251, 140, 0, 0.3);
}
.verdict-go {
  background: rgba(46, 125, 50, 0.08);
  border: 1px solid rgba(46, 125, 50, 0.3);
}
.verdict-tag {
  font-size: 16px;
  font-weight: 700;
}
.verdict-text {
  font-size: 14px;
  font-weight: 500;
  color: var(--c-text-soft);
}

.weekly-cta {
  text-align: center;
}

/* ===================== PRACTICE ===================== */
.practice-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}
.practice-card {
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  transition: all var(--transition);
  cursor: pointer;
}
.practice-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--c-primary);
}
.practice-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 4px;
  background: rgba(198, 40, 40, 0.1);
  color: var(--c-accent);
  margin-bottom: 16px;
}
.practice-card h3 {
  font-size: 17px;
  color: var(--c-text);
  margin-bottom: 12px;
  line-height: 1.4;
}
.practice-card p {
  font-size: 14px;
  color: var(--c-text-soft);
  margin-bottom: 16px;
}
.practice-meta {
  font-size: 12px;
  color: var(--c-text-muted);
  padding-top: 16px;
  border-top: 1px solid var(--c-border);
}

/* ===================== CHANGELOG ===================== */
.changelog-list {
  max-width: 880px;
  margin: 0 auto;
  position: relative;
}
.changelog-list::before {
  content: "";
  position: absolute;
  left: 80px;
  top: 20px;
  bottom: 20px;
  width: 2px;
  background: var(--c-border);
}
.changelog-item {
  display: flex;
  gap: 32px;
  padding: 24px 0;
  position: relative;
}
.changelog-version {
  flex-shrink: 0;
  width: 80px;
  padding-top: 4px;
  font-weight: 700;
  color: var(--c-primary);
  font-size: 15px;
  text-align: right;
}
.changelog-content {
  flex: 1;
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  position: relative;
}
.changelog-content::before {
  content: "";
  position: absolute;
  left: -32px;
  top: 28px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--c-primary);
  border: 3px solid var(--c-bg-soft);
  box-shadow: 0 0 0 4px rgba(11, 31, 58, 0.1);
}
.changelog-date {
  font-size: 12px;
  color: var(--c-text-muted);
}
.changelog-content h4 {
  font-size: 16px;
  color: var(--c-primary);
  margin: 6px 0 12px;
}
.changelog-content ul {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 14px;
  color: var(--c-text-soft);
  padding-left: 4px;
}

/* ===================== CTA BANNER ===================== */
.cta-banner {
  background:
    radial-gradient(ellipse 600px 400px at 80% 50%, rgba(255, 215, 0, 0.2), transparent 60%),
    linear-gradient(135deg, var(--c-primary) 0%, var(--c-primary-dark) 100%);
  padding: 80px 0;
  color: #fff;
  position: relative;
  overflow: hidden;
}
.cta-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 40px 40px;
}
.cta-inner {
  position: relative;
  z-index: 1;
  text-align: center;
}
.cta-inner h2 {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  margin-bottom: 12px;
}
.cta-inner p {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 32px;
}
.cta-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ===================== FOOTER ===================== */
.footer {
  background: #061025;
  color: rgba(255, 255, 255, 0.85);
  padding: 56px 0 0;
  font-size: 14px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.footer-col h5 {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  position: relative;
  padding-bottom: 8px;
}
.footer-col h5::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 24px;
  height: 2px;
  background: var(--c-gold);
}
.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-col a {
  color: rgba(255, 255, 255, 0.65);
  font-size: 14px;
  transition: color var(--transition);
}
.footer-col a:hover { color: var(--c-gold); }

.footer-logo {
  margin-bottom: 16px;
  display: inline-block;
}
.footer-logo-img {
  height: 44px;
  width: auto;
  display: block;
  /* Logo is black; flip to white for dark footer background */
  filter: brightness(0) invert(1);
  opacity: 0.94;
}
.footer-logo strong {
  display: block;
  font-size: 22px;
  color: #fff;
  margin-bottom: 4px;
  letter-spacing: 1px;
}
.footer-logo em {
  display: block;
  font-size: 11px;
  color: rgba(255, 255, 255, 0.5);
  font-style: normal;
  letter-spacing: 1px;
}
.footer-about {
  font-size: 13px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 20px;
}
.footer-socials {
  display: flex;
  gap: 8px;
}
.footer-socials a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.85);
  font-weight: 700;
  font-size: 13px;
  transition: all var(--transition);
}
.footer-socials a:hover {
  background: var(--c-gold);
  color: var(--c-primary);
  transform: translateY(-2px);
}

.footer-contact li {
  color: rgba(255, 255, 255, 0.65);
  font-size: 13px;
}

.footer-icp {
  padding: 24px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 12px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.55);
}
.icp-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: baseline;
}
.icp-row > span:first-child {
  flex-shrink: 0;
  min-width: 110px;
  color: rgba(255, 255, 255, 0.5);
}
.icp-row strong {
  color: rgba(255, 255, 255, 0.85);
  font-weight: 500;
  word-break: break-word;
}
.icp-scope {
  font-size: 11.5px;
  line-height: 1.7;
}
.icp-row-licenses {
  margin-top: 8px;
  gap: 16px;
}
.icp-license-link {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.footer-bottom {
  padding: 24px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.5);
}
.footer-license {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.license-placeholder {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.license-placeholder a {
  color: var(--c-gold);
  text-decoration: none;
}
.license-placeholder a:hover {
  text-decoration: underline;
}

/* ===================== MODAL ===================== */
.modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}
.modal[hidden] { display: none; }
.modal-mask {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
}
.modal-box {
  position: relative;
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 32px;
  max-width: 420px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
}
.modal-close {
  position: absolute;
  top: 12px;
  right: 16px;
  font-size: 24px;
  color: var(--c-text-muted);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}
.modal-close:hover { background: var(--c-bg-soft); color: var(--c-primary); }

.modal-title {
  font-size: 22px;
  color: var(--c-primary);
  margin-bottom: 8px;
}
.modal-subtitle {
  font-size: 14px;
  color: var(--c-text-soft);
  margin-bottom: 24px;
}

.modal-box label {
  display: block;
  margin-bottom: 16px;
}
.modal-box label > span {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--c-text-soft);
  margin-bottom: 6px;
}
.modal-box input[type=text],
.modal-box input[type=password],
.modal-box input[type=tel] {
  width: 100%;
  padding: 11px 14px;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  font: inherit;
  font-size: 14px;
  transition: border-color var(--transition);
  background: var(--c-bg-soft);
}
.modal-box input:focus {
  outline: 0;
  border-color: var(--c-primary);
  background: #fff;
}
.input-group {
  display: flex;
  gap: 8px;
}
.input-group input { flex: 1; }
.btn-send-code {
  padding: 0 16px;
  background: var(--c-primary);
  color: #fff;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
}
.btn-send-code:hover { background: var(--c-primary-dark); }

.modal-extra {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  margin-bottom: 20px;
}
.modal-extra a {
  color: var(--c-primary);
}
.checkbox, .checkbox-row {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--c-text-soft);
  font-size: 13px;
  cursor: pointer;
}
.checkbox-row {
  display: flex;
  margin: 16px 0 20px;
}
.checkbox-row a {
  color: var(--c-primary);
  text-decoration: underline;
}

.modal-foot {
  text-align: center;
  font-size: 14px;
  color: var(--c-text-soft);
  margin-top: 16px;
}
.modal-foot a {
  color: var(--c-primary);
  font-weight: 600;
}

/* ===================== SEARCH OVERLAY ===================== */
.search-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 80px 16px;
}
.search-overlay[hidden] { display: none; }
.search-overlay-mask {
  position: absolute;
  inset: 0;
  background: rgba(11, 31, 58, 0.85);
  backdrop-filter: blur(8px);
}
.search-overlay-box {
  position: relative;
  width: 100%;
  max-width: 720px;
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 24px;
}
.search-overlay-box form {
  display: flex;
  align-items: center;
  border: 2px solid var(--c-border);
  border-radius: var(--radius-sm);
  padding: 4px 4px 4px 16px;
}
.search-overlay-box form:focus-within {
  border-color: var(--c-primary);
}
.search-overlay-box input {
  flex: 1;
  border: 0;
  outline: 0;
  font: inherit;
  font-size: 16px;
  padding: 12px 16px;
  background: transparent;
}
.search-overlay-close {
  width: 40px;
  height: 40px;
  font-size: 28px;
  color: var(--c-text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
}
.search-overlay-close:hover { background: var(--c-bg-soft); }

.search-suggest {
  margin-top: 20px;
  font-size: 14px;
  color: var(--c-text-muted);
}
.search-suggest a {
  display: inline-block;
  margin: 4px 6px;
  padding: 4px 12px;
  background: var(--c-bg-soft);
  color: var(--c-primary);
  border-radius: 999px;
  font-size: 13px;
  transition: all var(--transition);
}
.search-suggest a:hover {
  background: var(--c-primary);
  color: #fff;
}

/* ===================== RESPONSIVE ===================== */
@media (max-width: 1100px) {
  .nav-main ul { gap: 0; }
  .nav-main a { padding: 8px 10px; font-size: 14px; }
}

@media (max-width: 900px) {
  .nav-main { display: none; }
  .menu-btn { display: flex; }
  .header-actions .btn-ghost,
  .header-actions .btn-primary {
    padding: 8px 14px;
    font-size: 14px;
  }
  .icon-btn { display: none; }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  .weekly-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .topbar-text { font-size: 12px; }
  .topbar-link { display: none; }

  .header-inner { height: 60px; }
  .logo-text em { display: none; }
  .header-actions .btn-ghost { display: none; }
  .header-actions .btn-primary {
    padding: 7px 12px;
    font-size: 13px;
  }

  .hero { padding: 48px 0 40px; }
  .section { padding: 56px 0; }

  .section-head { margin-bottom: 32px; }

  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
    align-items: center;
  }
  .footer-license { justify-content: center; }

  .icp-row > span:first-child {
    min-width: 90px;
    font-size: 11px;
  }

  .weekly-card { padding: 20px; }
  .weekly-grid { grid-template-columns: 1fr 1fr; }
  .weekly-verdict { flex-direction: column; }

  .qa-item {
    flex-direction: column;
    gap: 12px;
  }
  .qa-status {
    width: 100%;
    height: auto;
    padding: 8px;
    flex-direction: row;
    gap: 8px;
  }

  .changelog-item { gap: 16px; }
  .changelog-list::before { left: 60px; }
  .changelog-version { width: 60px; font-size: 13px; }
  .changelog-content::before { left: -24px; }

  .modal-box { padding: 24px; }
}

/* ===================== ACCESSIBILITY ===================== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

:focus-visible {
  outline: 2px solid var(--c-gold);
  outline-offset: 2px;
  border-radius: 2px;
}

/* Selection */
::selection {
  background: var(--c-gold);
  color: var(--c-primary);
}

/* ===================== FOOTER CERTS (资质证书公示) ===================== */
.footer-certs {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin: 18px 0 6px;
  padding-top: 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}
.cert-card {
  display: flex;
  align-items: center;
  gap: 12px;
  width: calc(50% - 8px);
  min-width: 240px;
  padding: 10px 12px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 10px;
  text-decoration: none;
  color: inherit;
  transition: border-color .2s, background .2s, transform .2s;
}
.cert-card:hover {
  border-color: var(--c-gold);
  background: rgba(255, 215, 0, 0.06);
  transform: translateY(-2px);
}
.cert-thumb {
  flex: 0 0 auto;
  width: 56px;
  height: 56px;
  border-radius: 8px;
  overflow: hidden;
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
}
.cert-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
/* 营业执照原图逆时针旋转 90°，这里转正显示 */
.cert-thumb.is-rot img {
  transform: rotate(-90deg) scale(1.32);
}
.cert-meta {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}
.cert-title {
  font-weight: 700;
  font-size: 13px;
  color: #fff;
}
.cert-sub {
  font-size: 11px;
  color: rgba(255, 255, 255, 0.55);
  line-height: 1.4;
}
.cert-view {
  margin-left: auto;
  font-size: 11px;
  color: var(--c-gold);
  white-space: nowrap;
}

@media (max-width: 640px) {
  .cert-card { width: 100%; }
}