:root {
  --bc-blue: #0052cc;
  --bc-blue-2: #1d4ed8;
  --bc-blue-3: #58a6ff;
  --bc-green: #039c00;
  --bc-red: #e90000;
  --bc-orange: #a34a10;
  --bc-ink: #0f172a;
  --bc-text: #475569;
  --bc-muted: #64748b;
  --bc-line: #dbe7f5;
  --bc-soft: #eff6ff;
  --bc-page: #f8fafc;
  --bc-card: #ffffff;
  --bc-radius: 8px;
  --bc-shadow: 0 18px 48px rgba(15, 23, 42, 0.08);
  --bc-font: "Source Han Sans CN", "Noto Sans CJK SC", "Microsoft YaHei", ui-sans-serif, system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

html,
body {
  height: auto;          /* 不要固定 100%，让 body 自然撑高 */
  overflow-y: auto;      /* 显式允许竖向滚动（iframe 内/独立访问都生效） */
  overflow-x: hidden;
}

body {
  margin: 0;
  min-width: 320px;
  background: var(--bc-page);
  color: var(--bc-ink);
  font-family: var(--bc-font);
  text-rendering: geometricprecision;
}

button,
input {
  font: inherit;
}

button {
  cursor: pointer;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  display: block;
  max-width: 100%;
}

.bc-page {
  min-height: 100vh;
  overflow-x: hidden;
}

.bc-container {
  width: min(1280px, calc(100% - 40px));
  margin: 0 auto;
}

.bc-container-wide {
  width: min(1500px, calc(100% - 40px));
  margin: 0 auto;
}

.bc-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 30;
  height: 64px;
  border-bottom: 1px solid rgba(219, 231, 245, 0.9);
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(18px);
}

.bc-header.is-static {
  position: sticky;
  background: rgba(255, 255, 255, 0.96);
}

.bc-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.bc-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 900;
  color: var(--bc-ink);
}

.bc-brand-mark {
  display: grid;
  width: 40px;
  height: 40px;
  place-items: center;
  border-radius: 10px;
  background: var(--bc-blue);
  color: #fff;
  box-shadow: 0 10px 24px rgba(0, 82, 204, 0.2);
}

.bc-nav {
  display: flex;
  align-items: center;
  gap: 32px;
  color: var(--bc-text);
  font-size: 14px;
  font-weight: 700;
}

.bc-nav a,
.bc-work-nav a {
  transition: color 0.18s ease;
}

.bc-nav a:hover,
.bc-work-nav a:hover {
  color: var(--bc-blue-2);
}

.bc-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 40px;
  border: 1px solid transparent;
  border-radius: var(--bc-radius);
  background: var(--bc-blue-2);
  color: #fff;
  padding: 0 18px;
  font-weight: 800;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

.bc-btn:hover {
  transform: translateY(-1px);
  background: var(--bc-blue);
  box-shadow: 0 14px 34px rgba(29, 78, 216, 0.22);
}

.bc-btn-outline {
  border-color: var(--bc-line);
  background: #fff;
  color: var(--bc-blue-2);
}

.bc-btn-outline:hover {
  background: var(--bc-soft);
  box-shadow: none;
}

.bc-hero {
  position: relative;
  isolation: isolate;
  display: flex;
  min-height: 90vh;
  align-items: center;
  overflow: hidden;
  border-bottom: 1px solid var(--bc-line);
  padding: 84px 0 24px;
}

.bc-hero-bg {
  position: absolute;
  inset: 0;
  z-index: -2;
  background: url("images/ad-backgroud.png") center / cover no-repeat;
}

.bc-hero::before {
  position: absolute;
  inset: 0;
  z-index: -2;
  content: "";
  background:
    radial-gradient(circle at 13% 82%, rgba(29, 78, 216, 0.12), transparent 28%),
    linear-gradient(90deg, rgba(255, 255, 255, 0.98), rgba(255, 255, 255, 0.86), rgba(255, 255, 255, 0.34)),
    linear-gradient(180deg, rgba(239, 246, 255, 0.8), rgba(255, 255, 255, 0.75));
}

.bc-hero::after {
  position: absolute;
  right: -14rem;
  top: 5rem;
  z-index: -1;
  width: 36rem;
  height: 36rem;
  border: 1px solid rgba(191, 219, 254, 0.75);
  border-radius: 50%;
  content: "";
}

.bc-hero-content {
  width: min(760px, 100%);
  transform: translateY(-40px);
}

.bc-eyebrow {
  display: inline-flex;
  align-items: center;
  border: 1px solid #dbeafe;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.82);
  box-shadow: 0 12px 32px rgba(29, 78, 216, 0.08);
  color: var(--bc-blue-2);
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 900;
}

.bc-hero-title {
  margin: 28px 0 0;
  background: linear-gradient(90deg, #004ac2, #1d4ed8, #58a6ff);
  background-clip: text;
  color: transparent;
  font-size: clamp(48px, 8vw, 86px);
  font-weight: 900;
  letter-spacing: 0;
  line-height: 1.06;
}

.bc-hero-desc {
  max-width: 680px;
  margin: 28px 0 0;
  color: var(--bc-text);
  font-size: clamp(20px, 2.2vw, 26px);
  font-weight: 800;
  line-height: 1.55;
}

.bc-hero-tools {
  display: grid;
  gap: 20px;
  margin-top: 36px;
}

.bc-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.bc-tag-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid #dbeafe;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.82);
  color: var(--bc-text);
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 800;
}

.bc-hero-meta {
  display: grid;
  max-width: 560px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.bc-hero-meta span {
  border: 1px solid #dbeafe;
  border-radius: var(--bc-radius);
  background: rgba(255, 255, 255, 0.84);
  box-shadow: 0 12px 28px rgba(29, 78, 216, 0.06);
  color: var(--bc-text);
  padding: 13px 16px;
  font-size: 14px;
  font-weight: 900;
}

.bc-hero-cta {
  width: max-content;
  min-height: 56px;
  padding: 0 28px;
  font-size: 16px;
}

.bc-dots {
  display: flex;
  gap: 8px;
}

.bc-dot {
  width: 10px;
  height: 10px;
  border: 0;
  border-radius: 999px;
  background: #bfdbfe;
  padding: 0;
  transition: width 0.18s ease, background 0.18s ease;
}

.bc-dot.active {
  width: 32px;
  background: var(--bc-blue-2);
}

.bc-section {
  padding: 96px 0;
  border-bottom: 1px solid var(--bc-line);
  background: #fff;
}

.bc-section.soft {
  background: #eff6ff;
}

.bc-section-title {
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
}

.bc-section-title.left {
  margin: 0;
  text-align: left;
}

.bc-section-title h2 {
  margin: 0;
  color: #020617;
  font-size: clamp(32px, 4vw, 52px);
  font-weight: 900;
  letter-spacing: 0;
  line-height: 1.15;
}

.bc-section-title p {
  margin: 20px 0 0;
  color: var(--bc-text);
  font-size: 18px;
  line-height: 1.9;
}

.bc-feature-list {
  display: grid;
  gap: 32px;
  margin-top: 56px;
}

.bc-feature-card {
  display: grid;
  overflow: hidden;
  border: 1px solid #e2e8f0;
  border-radius: 14px;
  background: #f8fafc;
  transition: transform 0.22s ease, border-color 0.22s ease, box-shadow 0.22s ease;
}

.bc-feature-card:hover {
  transform: translateY(-4px);
  border-color: #bfdbfe;
  box-shadow: 0 24px 70px rgba(15, 23, 42, 0.08);
}

.bc-feature-media {
  display: flex;
  min-height: 300px;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #eef6ff, #fff);
  padding: 28px;
}

.bc-feature-media img {
  width: min(620px, 100%);
  border-radius: 22px;
  filter: drop-shadow(0 26px 44px rgba(29, 78, 216, 0.16));
}

.bc-feature-body {
  display: flex;
  flex-direction: column;
  justify-content: center;
  background: #fff;
  padding: clamp(28px, 5vw, 48px);
}

.bc-feature-body h3 {
  margin: 0;
  color: #020617;
  font-size: clamp(28px, 3.3vw, 40px);
  font-weight: 900;
}

.bc-feature-body > p {
  margin: 20px 0 0;
  color: var(--bc-text);
  font-size: 16px;
  line-height: 1.9;
}

.bc-point-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 32px;
}

.bc-point {
  min-width: 0;
  border: 1px solid #e2e8f0;
  border-radius: var(--bc-radius);
  background: #f9fbff;
  padding: 16px;
  transition: border-color 0.18s ease, background 0.18s ease;
}

.bc-point:hover {
  border-color: #bfdbfe;
  background: #eff6ff;
}

.bc-point h4 {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  color: #0f172a;
  font-size: 14px;
  font-weight: 900;
}

.bc-point h4::before {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent, var(--bc-blue-2));
  content: "";
}

.bc-point p {
  margin: 8px 0 0;
  color: var(--bc-text);
  font-size: 14px;
  line-height: 1.75;
}

.bc-texture {
  position: relative;
  isolation: isolate;
  overflow: hidden;
}

.bc-texture::before {
  position: absolute;
  inset: 0;
  z-index: -2;
  background-image:
    linear-gradient(rgba(29, 78, 216, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(29, 78, 216, 0.08) 1px, transparent 1px),
    linear-gradient(135deg, rgba(255, 255, 255, 0.85), rgba(239, 246, 255, 0.35));
  background-size: 44px 44px, 44px 44px, 100% 100%;
  content: "";
}

.bc-texture::after {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(circle at 38% 42%, rgba(237, 233, 254, 0.7), transparent 24%),
    radial-gradient(circle at 70% 50%, rgba(220, 252, 231, 0.7), transparent 26%);
  content: "";
}

.bc-highlight-layout {
  display: grid;
  grid-template-columns: 0.82fr 1fr;
  align-items: center;
  gap: 48px;
}

.bc-highlight-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.bc-glass {
  min-width: 0;
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: var(--bc-radius);
  background: rgba(255, 255, 255, 0.55);
  padding: 22px;
  backdrop-filter: blur(18px);
  transition: transform 0.18s ease, border-color 0.18s ease;
}

.bc-glass:hover {
  transform: translateY(-4px);
  border-color: #fff;
}

.bc-glass.wide {
  grid-column: span 2;
}

.bc-icon-box {
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  border-radius: var(--bc-radius);
  background: #e6f2ff;
  color: var(--bc-blue);
}

.bc-glass h3 {
  margin: 20px 0 0;
  font-size: 20px;
  font-weight: 900;
}

.bc-glass p {
  margin: 12px 0 0;
  color: var(--bc-text);
  font-size: 14px;
  line-height: 1.8;
}

.bc-workflow {
  position: relative;
  isolation: isolate;
  overflow: hidden;
}

.bc-workflow::before,
.bc-workflow::after {
  position: absolute;
  z-index: -1;
  width: 28rem;
  height: 28rem;
  border-radius: 50%;
  filter: blur(64px);
  opacity: 0.7;
  content: "";
}

.bc-workflow::before {
  left: 18%;
  top: 18%;
  background: #ede9fe;
}

.bc-workflow::after {
  right: 16%;
  bottom: 10%;
  background: #dcfce7;
}

.bc-process-grid {
  display: grid;
  grid-template-columns: minmax(132px, 1fr) minmax(132px, 1fr) 96px minmax(132px, 1fr) 96px minmax(132px, 1fr);
  align-items: center;
  gap: 12px;
  margin-top: 48px;
}

.bc-process-card,
.bc-wait-card {
  display: flex;
  min-width: 0;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.bc-process-card {
  min-height: 220px;
  gap: 16px;
  border: 1px solid #8ec5ff;
  border-radius: 22px;
  background: #fff;
  box-shadow: 0 18px 48px rgba(29, 78, 216, 0.07);
  padding: 18px 16px;
  transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}

.bc-process-card:hover {
  transform: translateY(-4px);
  border-color: var(--bc-blue-2);
  box-shadow: 0 24px 60px rgba(29, 78, 216, 0.12);
}

.bc-process-title {
  width: 100%;
  border-radius: 999px;
  background: #d9ebfe;
  color: #015bab;
  padding: 6px 12px;
  font-size: 14px;
  font-weight: 900;
}

.bc-process-icon {
  display: grid;
  width: 74px;
  height: 74px;
  place-items: center;
  border-radius: 14px;
  background: #eef6ff;
  color: var(--bc-blue-2);
}

/* process 卡里把图标位换成了图片：撑满原 74×74 浅蓝底圆角容器 */
.bc-process-card .bc-process-icon > img {
  display: block;
  width: 100%;
  height: 100%;
  border-radius: 14px;
  object-fit: contain;
}

.bc-process-card p,
.bc-wait-card p {
  margin: 0;
  color: var(--bc-text);
  font-size: 16px;
  line-height: 1.55;
}

.bc-wait-card {
  width: 96px;
  height: 148px;
  gap: 8px;
  border: 1px dashed #a5d1fd;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.72);
  color: #004894;
  padding: 14px 10px;
}

.bc-wait-card span {
  font-size: 15px;
  line-height: 1.45;
}

.bc-testimonials {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  margin-top: 48px;
}

.bc-quote-card {
  display: flex;
  min-height: 390px;
  flex-direction: column;
  border: 1px solid #dbeafe;
  border-radius: var(--bc-radius);
  background: #fff;
  box-shadow: 0 18px 60px rgba(15, 23, 42, 0.06);
  padding: 28px;
}

.bc-quote {
  margin: 22px 0 0;
  color: #334155;
  font-size: 16px;
  line-height: 2;
}

.bc-person {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: auto;
  border-top: 1px solid #e2e8f0;
  padding-top: 22px;
}

.bc-avatar {
  display: grid;
  width: 48px;
  height: 48px;
  flex: 0 0 auto;
  place-items: center;
  border: 1px solid #dbeafe;
  border-radius: 999px;
  background: linear-gradient(135deg, #e6f2ff, #fff);
  color: var(--bc-blue-2);
  font-weight: 900;
}

.bc-person-main {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 12px;
  font-size: 14px;
}

.bc-person-main strong {
  color: #0f172a;
  font-size: 18px;
}

.bc-person-main span {
  color: var(--bc-blue-2);
  font-weight: 900;
}

.bc-person-company {
  margin: 3px 0 0;
  color: var(--bc-text);
  font-size: 14px;
}

.bc-faq-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  margin-top: 48px;
}

.bc-faq-card {
  min-height: 250px;
}

.bc-faq-card h3 {
  margin: 20px 0 0;
  color: #0f172a;
  font-size: 18px;
  font-weight: 900;
  line-height: 1.55;
}

.bc-faq-card p {
  margin: 14px 0 0;
  color: var(--bc-text);
  font-size: 16px;
  line-height: 1.9;
}

.bc-work-page {
  min-height: 100vh;
  background: #f8fafc;
  overflow: visible;     /* 不要裁切内容，让 body 自己决定是否滚动 */
}

.bc-work-header {
  position: sticky;
  top: 0;
  z-index: 20;
  height: 64px;
  border-bottom: 1px solid #e2e8f0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(16px);
}

.bc-work-nav {
  display: flex;
  height: 100%;
  align-items: center;
  gap: 36px;
}

.bc-work-nav a {
  display: flex;
  height: 64px;
  align-items: center;
  border-bottom: 2px solid transparent;
  color: var(--bc-text);
  padding: 0 16px;
  font-size: 14px;
  font-weight: 700;
}

.bc-work-nav a.active {
  border-color: var(--bc-blue-2);
  color: var(--bc-blue-2);
}

.bc-userbar {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--bc-text);
  font-size: 14px;
}

.bc-userbar img {
  width: 32px;
  height: 32px;
  border: 1px solid #e2e8f0;
  border-radius: 50%;
}

.bc-count {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 32px;
  border-radius: 999px;
  background: linear-gradient(90deg, #feeede, #fabf85);
  color: var(--bc-orange);
  padding: 0 12px;
  font-size: 13px;
  font-weight: 800;
}

.bc-work-hero {
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, #eff6ff, #fff);
}

.bc-work-hero::before {
  position: absolute;
  inset: 0 0 0 auto;
  display: block;
  width: 100%;
  background: url("images/home_background.png") right no-repeat;
  content: "";
}

.bc-work-hero::after {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 8% 84%, rgba(29, 78, 216, 0.14), transparent 22%);
  content: "";
}

.bc-work-hero-inner {
  position: relative;
  z-index: 1;
  display: flex;
  min-height: 413px;
  flex-direction: column;
  justify-content: center;
}

.bc-work-hero h1 {
  margin: 0;
  color: #020617;
  font-size: clamp(36px, 4vw, 52px);
  font-weight: 900;
  line-height: 1.15;
}

.bc-work-hero p {
  max-width: 690px;
  margin: 10px 0 0;
  color: var(--bc-blue-2);
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 900;
  line-height: 1.35;
}

.bc-work-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  margin-top: 24px;
  color: var(--bc-muted);
  font-weight: 700;
}

.bc-work-section {
  padding: 40px 0;
}

.bc-section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 24px;
}

.bc-section-head h2 {
  margin: 0;
  font-size: 24px;
  font-weight: 800;
}

.bc-project-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.bc-project-card {
  display: flex;
  min-height: 194px;
  min-width: 0;
  flex-direction: column;
  gap: 12px;
  border: 1px solid #e2e8f0;
  border-radius: var(--bc-radius);
  background: #fff;
  padding: 20px;
  transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}

.bc-project-card:hover {
  transform: translateY(-2px);
  border-color: #bfdbfe;
  box-shadow: 0 14px 35px rgba(15, 23, 42, 0.08);
}

.bc-status {
  width: max-content;
  border-radius: 4px;
  padding: 3px 8px;
  font-size: 12px;
  font-weight: 900;
}

.bc-status.gray {
  background: #f1f5f9;
  color: #475569;
}

.bc-status.blue {
  background: #dbeafe;
  color: var(--bc-blue-2);
}

.bc-status.green {
  background: #dcfce7;
  color: #15803d;
}

.bc-project-card h3 {
  display: -webkit-box;
  min-height: 48px;
  margin: 0;
  overflow: hidden;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  color: #1e293b;
  font-size: 15px;
  font-weight: 800;
  line-height: 1.6;
}

.bc-progress-row {
  display: grid;
  height: 28px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: center;
  border-radius: 5px;
  background: #e6f2ff;
  color: var(--bc-muted);
  padding: 0 8px;
  text-align: center;
  font-size: 10px;
}

.bc-progress-line {
  overflow: hidden;
  height: 6px;
  border-radius: 999px;
  background: #f1f5f9;
}

.bc-progress-line i {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: var(--bc-blue-2);
}

.bc-project-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: auto;
  color: #94a3b8;
  font-size: 10px;
}

.bc-feature-mini-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 16px;
  margin-top: 32px;
}

.bc-mini-card {
  display: flex;
  min-height: 242px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 20px;
  border: 1px solid #e2e8f0;
  border-radius: var(--bc-radius);
  background: #fff;
  padding: 24px 20px;
  text-align: center;
  transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}

.bc-mini-card:hover {
  transform: translateY(-2px);
  border-color: #bfdbfe;
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.07);
}

.bc-mini-card h3 {
  margin: 0;
  color: #1e293b;
  font-size: 16px;
  font-weight: 900;
}

.bc-mini-card p {
  margin: 8px 0 0;
  color: var(--bc-text);
  font-size: 14px;
  line-height: 1.7;
}

/* mini 卡片里把图标位换成了图片：保留原图标容器尺寸/居中布局 */
.bc-mini-card .bc-process-icon {
  width: 60px;
  height: 60px;
}

.bc-mini-card .bc-process-icon > img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

/* ===========================================================
 *  壳页面布局（bid_check_frame.html 使用）
 *  顶部栏 + iframe 内容区，flex 布局撑满整个视口
 * =========================================================== */
.bc-frame-body {
  margin: 0;
  height: 100vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.bc-frame-header {
  flex: 0 0 auto;
  position: static;          /* 不再用 sticky，由 flex 布局占位 */
}

/* 壳页面顶部栏布局：logo + 文字 + nav 全部靠左一字排开，userbar 靠右 */
.bc-frame-header-inner {
  justify-content: flex-start;
  gap: 32px;
}

.bc-brand-logo {
  display: block;
  height: 32px;
  width: auto;
}

.bc-brand-text {
  font-size: 20px;
}

.bc-frame-userbar {
  margin-left: auto;
}

.bc-frame-iframe {
  flex: 1 1 0;          /* basis:0 而不是 auto，防止 iframe 按内容文档高度被撑开 */
  min-height: 0;        /* 允许 flex 项收缩到 0 以下，强制只占父容器剩余空间 */
  width: 100%;
  border: 0;
  display: block;
  background: transparent; /* 让容器淡蓝底色在两侧 padding 区显示出来 */
}

/* 内容容器：首页保持无内边距无底色（默认透明，透出 body 的页面背景） */
.bc-frame-content {
  flex: 1 1 0;
  min-height: 0;
  display: flex;
  flex-direction: column;
  transition: padding 0.2s ease, background 0.2s ease;
}

/* 我的项目（含 list/detail/confirm）模式：左右内边距加宽 + 淡蓝底色 */
body.bc-list-mode .bc-frame-content {
  padding: 0 56px;
  background: #eef5ff;
}

/* ===========================================================
 *  用户头像下拉框（点击头像展开"退出登录"）
 *  参照 fui/themes/elegant 的 .user-action-item.logout 样式
 * =========================================================== */
.bc-userbar {
  position: relative;   /* 让下拉框能相对于它绝对定位 */
}

.bc-user-trigger {
  position: relative;   /* 下拉框相对于头像区域定位，确保正下方对齐 */
  display: flex;
  align-items: center;
  gap: 8px;
  border-radius: 6px;
  padding: 4px 10px 4px 4px;
  cursor: pointer;
  transition: background 0.15s ease;
  user-select: none;
}

.bc-user-trigger:hover {
  background: rgba(15, 23, 42, 0.05);
}

.bc-user-trigger.is-open {
  background: rgba(15, 23, 42, 0.06);
}

.bc-user-caret {
  margin-left: 2px;
  color: var(--bc-text, #475569);
  transition: transform 0.2s ease;
}

.bc-user-trigger.is-open .bc-user-caret {
  transform: rotate(180deg);
}

.bc-user-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  z-index: 100;
  min-width: 140px;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.12);
  padding: 4px 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: opacity 0.15s ease, transform 0.15s ease, visibility 0.15s ease;
}

.bc-user-dropdown.is-open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.bc-user-dropdown-item {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 36px;
  padding: 0 14px;
  color: var(--bc-ink, #0f172a);
  font-size: 14px;
  cursor: pointer;
  transition: background 0.12s ease;
}

.bc-user-dropdown-item:hover {
  background: #f1f5f9;
}

@media (min-width: 960px) {
  .bc-feature-card {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .bc-feature-card:nth-child(even) .bc-feature-media {
    order: 2;
  }
}

@media (max-width: 1100px) {
  .bc-highlight-layout,
  .bc-testimonials,
  .bc-faq-grid,
  .bc-project-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .bc-process-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .bc-wait-card {
    width: min(126px, 100%);
    justify-self: center;
  }

  .bc-feature-mini-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  .bc-container,
  .bc-container-wide {
    width: min(100% - 28px, 1500px);
  }

  .bc-header {
    height: auto;
  }

  .bc-header-inner {
    height: auto;
    flex-wrap: wrap;
    gap: 12px;
    padding: 12px 0;
  }

  .bc-nav {
    order: 3;
    width: 100%;
    justify-content: space-between;
    gap: 12px;
    overflow-x: auto;
  }

  .bc-hero {
    padding-top: 132px;
  }

  .bc-hero-content {
    transform: none;
  }

  .bc-hero-meta,
  .bc-highlight-layout,
  .bc-highlight-grid,
  .bc-point-grid,
  .bc-testimonials,
  .bc-faq-grid,
  .bc-project-grid,
  .bc-feature-mini-grid {
    grid-template-columns: 1fr;
  }

  .bc-glass.wide {
    grid-column: auto;
  }

  .bc-section,
  .bc-work-section {
    padding: 64px 0;
  }

  .bc-process-grid {
    grid-template-columns: 1fr;
  }

  .bc-work-hero::before {
    opacity: 0.22;
    width: 100%;
  }

  .bc-userbar {
    display: none;
  }
}