/* =============================================================
   乐冠国际 / 共享 Site Kit
   视觉语汇：深空蓝 · 活力橙 · 金属银 · 极简文字建筑
   ============================================================= */

/* ---------- 1. 变量与基础 ---------- */
:root {
  --deep-space: #0A1428;
  --deep-space-2: #0E2A47;
  --brand-blue: #2563EB;
  --vibrant-orange: #F97316;
  --metallic-silver: #C0C7D1;
  --paper-white: #F5F7FA;
  --ink-black: #0F172A;
  --warm-gray: #D8DCE2;
  --light-blue: #93C5FD;

  --font-sans: system-ui, -apple-system, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --container-width: 1180px;
  --radius-sm: 2px;
  --radius-md: 6px;
  --duration: 320ms;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

*,
*::before,
*::after {
  box-sizing: inherit;
}

html {
  box-sizing: border-box;
  scroll-behavior: smooth;
  background: var(--deep-space);
}

main {
  display: block;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--deep-space);
  color: var(--paper-white);
  font-family: var(--font-sans);
  font-size: clamp(1rem, 1.2vw, 1.25rem);
  line-height: 1.8;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body,
h1,
h2,
h3,
h4,
h5,
h6,
p,
ul,
ol,
dl,
dd,
figure {
  margin: 0;
  padding: 0;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  color: var(--paper-white);
  font-family: var(--font-sans);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2rem, 6vw, 5rem);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -0.03em;
}

h2 {
  font-size: clamp(1.5rem, 3vw, 2.75rem);
  font-weight: 800;
  line-height: 1.22;
}

h3 {
  font-size: clamp(1.25rem, 1.8vw, 1.75rem);
  font-weight: 700;
  line-height: 1.32;
}

h4,
h5,
h6 {
  font-size: 1.125rem;
  font-weight: 700;
  line-height: 1.4;
}

p {
  margin-bottom: 1rem;
}

ul,
ol {
  padding-left: 1.5em;
}

li:not(:last-child) {
  margin-bottom: 0.25em;
}

a {
  color: var(--light-blue);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--vibrant-orange);
}

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

::selection {
  background: rgba(249, 115, 22, 0.9);
  color: var(--deep-space);
}

:focus-visible {
  outline: 2px solid var(--vibrant-orange);
  outline-offset: 3px;
}

#main-content {
  min-height: 50vh;
}

#main-content:focus {
  outline: none;
}

/* ---------- 2. 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 200;
  padding: 0.75rem 1.25rem;
  background: var(--vibrant-orange);
  color: var(--deep-space);
  font-size: 0.9375rem;
  font-weight: 700;
  line-height: 1;
  border-radius: 0 0 var(--radius-sm) 0;
  text-decoration: none;
  transform: translateY(-120%);
  transition: transform 0.24s var(--ease-out);
}

.skip-link:focus-visible {
  transform: translateY(0);
}

/* ---------- 3. 头部 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 20, 40, 0.88);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(192, 199, 209, 0.16);
}

.site-header::before {
  content: "";
  display: block;
  height: 4px;
  background: repeating-linear-gradient(
    90deg,
    rgba(147, 197, 253, 0.45) 0,
    rgba(147, 197, 253, 0.45) 1px,
    transparent 1px,
    transparent 10px
  );
  opacity: 0.55;
}

.header-inner {
  max-width: var(--container-width);
  min-height: 72px;
  margin-inline: auto;
  padding: 0.625rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
  color: var(--paper-white);
  text-decoration: none;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border: 1px solid rgba(192, 199, 209, 0.65);
  border-radius: var(--radius-sm);
  transform: rotate(45deg);
}

.brand-mark::after {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--vibrant-orange);
  box-shadow: 0 0 12px rgba(249, 115, 22, 0.9);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.18;
}

.brand-text strong {
  font-size: 1.125rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--paper-white);
}

.brand-tagline {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.32em;
  color: var(--vibrant-orange);
  white-space: nowrap;
}

.site-nav {
  display: flex;
  align-items: center;
  margin-left: auto;
}

.nav-list {
  list-style: none;
  display: flex;
  align-items: center;
  gap: clamp(0.25rem, 1.2vw, 1.25rem);
  margin: 0;
  padding: 0;
}

.nav-link {
  position: relative;
  display: inline-block;
  padding: 0.5rem 0.35rem;
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: rgba(245, 247, 250, 0.72);
  text-decoration: none;
  transition: color 0.2s ease;
}

.nav-link:hover {
  color: var(--paper-white);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0.35rem;
  right: 0.35rem;
  bottom: 0.25rem;
  height: 1.5px;
  background: var(--vibrant-orange);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.24s var(--ease-out);
}

.nav-link:hover::after {
  transform: scaleX(1);
}

.nav-link[aria-current="page"] {
  color: var(--paper-white);
  font-weight: 700;
}

.nav-link[aria-current="page"]::before {
  content: "";
  display: inline-block;
  width: 5px;
  height: 5px;
  margin-right: 0.4rem;
  background: var(--vibrant-orange);
  vertical-align: middle;
  box-shadow: 0 0 8px rgba(249, 115, 22, 0.85);
}

.nav-link[aria-current="page"]::after {
  transform: scaleX(1);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

.login-entry {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.625rem 1.125rem;
  border: 1px solid rgba(249, 115, 22, 0.45);
  border-radius: var(--radius-sm);
  background: rgba(249, 115, 22, 0.08);
  color: var(--paper-white);
  font-size: 0.9375rem;
  font-weight: 700;
  line-height: 1;
  text-decoration: none;
  transition: border-color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}

.login-entry:hover {
  border-color: var(--vibrant-orange);
  background: rgba(249, 115, 22, 0.16);
  color: var(--paper-white);
  box-shadow: 0 0 22px rgba(249, 115, 22, 0.25);
}

.login-glow {
  width: 7px;
  height: 7px;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--vibrant-orange);
  box-shadow: 0 0 6px var(--vibrant-orange), 0 0 14px rgba(249, 115, 22, 0.8);
  animation: login-breathe 2.4s ease-in-out infinite;
}

@keyframes login-breathe {
  0%,
  100% {
    box-shadow: 0 0 5px var(--vibrant-orange), 0 0 10px rgba(249, 115, 22, 0.45);
    opacity: 0.75;
  }
  50% {
    box-shadow: 0 0 12px var(--vibrant-orange), 0 0 26px rgba(249, 115, 22, 0.95);
    opacity: 1;
  }
}

.login-text {
  white-space: nowrap;
}

.login-caption {
  padding-left: 0.75rem;
  border-left: 1px solid rgba(192, 199, 209, 0.35);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  line-height: 1.45;
  letter-spacing: 0.02em;
  color: var(--light-blue);
  max-width: 210px;
}

@media (max-width: 1080px) {
  .login-caption {
    display: none;
  }
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: 1px solid rgba(192, 199, 209, 0.4);
  border-radius: var(--radius-sm);
  background: transparent;
  padding: 0;
  cursor: pointer;
}

.nav-toggle-line {
  width: 22px;
  height: 1.5px;
  background: var(--paper-white);
  transition: transform 0.24s var(--ease-out), opacity 0.2s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(1) {
  transform: translateY(7.5px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(3) {
  transform: translateY(-7.5px) rotate(-45deg);
}

/* ---------- 4. 页脚 ---------- */
.site-footer {
  position: relative;
  background:
    radial-gradient(ellipse at 85% 130%, rgba(37, 99, 235, 0.16), transparent 60%),
    radial-gradient(ellipse at 5% 0%, rgba(249, 115, 22, 0.06), transparent 45%),
    var(--deep-space);
  border-top: 1px solid rgba(192, 199, 209, 0.22);
  color: rgba(245, 247, 250, 0.78);
  overflow: hidden;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(
    90deg,
    var(--vibrant-orange) 0,
    var(--vibrant-orange) 96px,
    rgba(192, 199, 209, 0.4) 360px,
    rgba(192, 199, 209, 0.1) 100%
  );
}

.site-footer::after {
  content: "焕新更醒";
  position: absolute;
  right: 1.5rem;
  bottom: 2.5rem;
  z-index: 0;
  font-size: clamp(6rem, 18vw, 15rem);
  font-weight: 900;
  line-height: 0.8;
  letter-spacing: -0.04em;
  color: rgba(192, 199, 209, 0.05);
  -webkit-text-stroke: 1px rgba(192, 199, 209, 0.12);
  pointer-events: none;
  user-select: none;
}

.footer-grid,
.footer-bottom {
  position: relative;
  z-index: 1;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.4fr;
  gap: 2.5rem 3rem;
  padding: 3.5rem 0 2.5rem;
}

.footer-brand-name {
  margin-bottom: 0.75rem;
  font-size: 1.375rem;
  font-weight: 900;
  letter-spacing: 0.05em;
  color: var(--paper-white);
}

.footer-brand-name em {
  margin-left: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 400;
  font-style: normal;
  letter-spacing: 0.2em;
  color: var(--vibrant-orange);
}

.footer-about {
  margin-bottom: 0.75rem;
  font-size: 0.9375rem;
  color: rgba(245, 247, 250, 0.78);
}

.footer-trust {
  font-size: 0.875rem;
  line-height: 1.7;
  color: rgba(192, 199, 209, 0.65);
}

.footer-title {
  margin-bottom: 1rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--light-blue);
}

.footer-links ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-links li {
  margin-bottom: 0.15rem;
}

.footer-links a {
  display: inline-block;
  padding: 0.25rem 0 0.25rem 0.75rem;
  border-left: 1px solid transparent;
  color: rgba(245, 247, 250, 0.72);
  font-size: 0.9375rem;
  transition: border-color 0.2s ease, color 0.2s ease, padding-left 0.2s ease;
}

.footer-links a:hover {
  border-left-color: var(--vibrant-orange);
  color: var(--vibrant-orange);
  padding-left: 1rem;
}

.footer-contacts p {
  margin-bottom: 0.5rem;
  font-size: 0.9375rem;
  color: rgba(245, 247, 250, 0.78);
}

.footer-service-time {
  margin-top: 0.5rem;
  padding-top: 0.75rem;
  border-top: 1px solid rgba(192, 199, 209, 0.16);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.02em;
  color: var(--light-blue);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
  padding: 1.25rem 0 1.5rem;
  border-top: 1px solid rgba(192, 199, 209, 0.16);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.03em;
  color: rgba(192, 199, 209, 0.65);
}

.footer-bottom p {
  margin: 0;
}

/* ---------- 5. 容器与章节 ---------- */
.container {
  max-width: var(--container-width);
  margin-inline: auto;
  padding-inline: clamp(1rem, 3vw, 1.75rem);
}

.container-narrow {
  max-width: 780px;
  margin-inline: auto;
  padding-inline: clamp(1rem, 3vw, 1.75rem);
}

.section {
  padding-block: clamp(3rem, 8vw, 6rem);
}

.section--dark {
  background: var(--deep-space);
}

.section--light {
  background: var(--paper-white);
  color: var(--ink-black);
}

.section--light h1,
.section--light h2,
.section--light h3,
.section--light h4,
.section--light h5,
.section--light h6 {
  color: var(--ink-black);
}

.section--light a {
  color: var(--brand-blue);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.section--light a:hover {
  color: var(--vibrant-orange);
}

.section--light .section-intro {
  color: rgba(15, 23, 42, 0.72);
}

.section--light .note {
  color: #475569;
}

.section-head {
  max-width: 720px;
  margin-bottom: clamp(1.5rem, 4vw, 3rem);
}

/* ---------- 6. 标题组与注释 ---------- */
.eyebrow {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  margin-bottom: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.4;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--light-blue);
}

.eyebrow::before {
  content: "";
  width: 1.5rem;
  height: 1px;
  background: var(--vibrant-orange);
}

.section--light .eyebrow {
  color: var(--brand-blue);
}

.section--light .eyebrow::before {
  background: var(--vibrant-orange);
}

.section-title {
  margin-bottom: 0.75rem;
}

.section-intro {
  max-width: 62ch;
  color: rgba(245, 247, 250, 0.72);
}

.note {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: var(--light-blue);
}

/* ---------- 7. 按钮与标签 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 700;
  line-height: 1.2;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}

.btn-primary {
  background: var(--vibrant-orange);
  border-color: var(--vibrant-orange);
  color: var(--deep-space);
}

.btn-primary:hover {
  background: #fb923c;
  border-color: #fb923c;
  color: var(--deep-space);
  box-shadow: 0 0 24px rgba(249, 115, 22, 0.4);
}

.btn-ghost {
  background: rgba(192, 199, 209, 0.04);
  border-color: rgba(192, 199, 209, 0.45);
  color: var(--paper-white);
}

.btn-ghost:hover {
  border-color: var(--vibrant-orange);
  color: var(--vibrant-orange);
  background: rgba(249, 115, 22, 0.06);
}

.section--light .btn-primary,
.section--light .btn-primary:hover {
  color: var(--deep-space);
  text-decoration: none;
}

.section--light .btn-ghost {
  color: var(--ink-black);
  border-color: rgba(15, 23, 42, 0.35);
  text-decoration: none;
}

.section--light .btn-ghost:hover {
  color: var(--vibrant-orange);
  border-color: var(--vibrant-orange);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.25rem 0.625rem;
  border: 1px solid rgba(192, 199, 209, 0.35);
  border-radius: var(--radius-sm);
  background: rgba(192, 199, 209, 0.07);
  color: var(--metallic-silver);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  line-height: 1.4;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.tag--orange {
  border-color: rgba(249, 115, 22, 0.55);
  color: #fb923c;
  background: rgba(249, 115, 22, 0.1);
}

.tag--silver {
  border-color: rgba(192, 199, 209, 0.5);
  color: var(--metallic-silver);
  background: rgba(192, 199, 209, 0.05);
}

/* ---------- 8. 卡片与数字 ---------- */
.card {
  position: relative;
  padding: 1.75rem;
  border: 1px solid rgba(192, 199, 209, 0.2);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.03);
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.card:hover {
  border-color: rgba(249, 115, 22, 0.6);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
}

.card--dark {
  background: rgba(10, 20, 40, 0.55);
}

.card--light {
  background: var(--paper-white);
  border-color: rgba(15, 23, 42, 0.12);
  color: var(--ink-black);
}

.card--light h1,
.card--light h2,
.card--light h3,
.card--light h4 {
  color: var(--ink-black);
}

.card--outline {
  background: transparent;
  border-color: rgba(192, 199, 209, 0.35);
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.stat-value {
  font-size: clamp(2rem, 5vw, 3.75rem);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--vibrant-orange);
}

.stat-label {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.1em;
  color: var(--light-blue);
}

.section--light .stat-label {
  color: var(--brand-blue);
}

/* ---------- 9. 框景与图片容器 ---------- */
.frame-panel {
  position: relative;
  padding: clamp(1.5rem, 4vw, 3rem);
  border: 1px solid rgba(192, 199, 209, 0.35);
  border-radius: var(--radius-sm);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.01));
}

.frame-panel::before,
.frame-panel::after {
  content: "";
  position: absolute;
  width: 1.25rem;
  height: 1.25rem;
  border: 0 solid var(--vibrant-orange);
}

.frame-panel::before {
  top: -1px;
  left: -1px;
  border-top-width: 2px;
  border-left-width: 2px;
}

.frame-panel::after {
  top: -1px;
  right: -1px;
  border-top-width: 2px;
  border-right-width: 2px;
}

.frame-corner {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.frame-corner::before,
.frame-corner::after {
  content: "";
  position: absolute;
  width: 1.25rem;
  height: 1.25rem;
  border: 0 solid var(--vibrant-orange);
}

.frame-corner::before {
  bottom: -1px;
  left: -1px;
  border-bottom-width: 2px;
  border-left-width: 2px;
}

.frame-corner::after {
  bottom: -1px;
  right: -1px;
  border-bottom-width: 2px;
  border-right-width: 2px;
}

.section--light .frame-panel {
  border-color: rgba(15, 23, 42, 0.18);
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.04), rgba(15, 23, 42, 0.01));
}

.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: var(--media-ratio, 16 / 9);
  background:
    repeating-linear-gradient(45deg, rgba(147, 197, 253, 0.035) 0, rgba(147, 197, 253, 0.035) 8px, transparent 8px, transparent 16px),
    linear-gradient(160deg, var(--deep-space-2), var(--deep-space));
  border: 1px solid rgba(192, 199, 209, 0.22);
  border-radius: var(--radius-sm);
}

.media-frame::after {
  content: "";
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  width: 1rem;
  height: 1rem;
  border-top: 1.5px solid rgba(249, 115, 22, 0.7);
  border-right: 1.5px solid rgba(249, 115, 22, 0.7);
  opacity: 0.75;
  pointer-events: none;
}

.media-frame img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame--4-3 {
  --media-ratio: 4 / 3;
}

.media-frame--1-1 {
  --media-ratio: 1 / 1;
}

.media-frame--wide {
  --media-ratio: 21 / 9;
}

.media-frame--light {
  background:
    repeating-linear-gradient(45deg, rgba(15, 23, 42, 0.035) 0, rgba(15, 23, 42, 0.035) 8px, transparent 8px, transparent 16px),
    linear-gradient(160deg, var(--paper-white), var(--warm-gray));
  border-color: rgba(15, 23, 42, 0.15);
}

/* ---------- 10. 技能树式路径 ---------- */
.path-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.path-step {
  position: relative;
  padding-left: 3rem;
}

.path-step::before {
  content: "";
  position: absolute;
  left: calc(0.625rem - 0.5px);
  top: 1.75rem;
  bottom: -1.5rem;
  width: 1px;
  background: linear-gradient(180deg, rgba(249, 115, 22, 0.7), rgba(192, 199, 209, 0.18));
}

.path-step:last-child::before {
  display: none;
}

.path-node {
  position: absolute;
  left: 0;
  top: 0.125rem;
  width: 1.25rem;
  height: 1.25rem;
  display: grid;
  place-items: center;
  border: 1px solid var(--vibrant-orange);
  border-radius: var(--radius-sm);
  background: var(--deep-space);
}

.path-node::after {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--vibrant-orange);
  box-shadow: 0 0 8px rgba(249, 115, 22, 0.85);
}

.path-step-label {
  display: block;
  margin-bottom: 0.25rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--light-blue);
}

.path-step-title {
  display: block;
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.4;
}

.section--light .path-step-label {
  color: var(--brand-blue);
}

.section--light .path-node {
  background: var(--paper-white);
  border-color: var(--vibrant-orange);
}

/* ---------- 11. 面包屑与分隔线 ---------- */
.breadcrumb {
  margin-bottom: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
}

.breadcrumb li {
  display: inline-flex;
  align-items: center;
  margin: 0;
}

.breadcrumb li:not(:last-child)::after {
  content: "/";
  margin: 0 0.5rem;
  color: rgba(192, 199, 209, 0.45);
}

.breadcrumb a {
  color: var(--light-blue);
  text-decoration: none;
}

.breadcrumb a:hover {
  color: var(--vibrant-orange);
}

.breadcrumb [aria-current="page"] {
  color: rgba(245, 247, 250, 0.6);
}

.section--light .breadcrumb a {
  color: var(--brand-blue);
}

.section--light .breadcrumb a:hover {
  color: var(--vibrant-orange);
}

.section--light .breadcrumb [aria-current="page"] {
  color: rgba(15, 23, 42, 0.55);
}

.hairline {
  height: 1px;
  background: linear-gradient(90deg, rgba(192, 199, 209, 0.4), rgba(192, 199, 209, 0.08) 80%);
}

/* ---------- 12. 网格 ---------- */
.grid {
  display: grid;
  gap: 1.5rem;
}

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

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

/* ---------- 13. 滚动显现 ---------- */
.js-reveal [data-reveal] {
  opacity: 0;
  transform: translate3d(0, 16px, 0);
  transition:
    opacity var(--duration) var(--ease-out),
    transform var(--duration) var(--ease-out);
  transition-delay: var(--reveal-delay, 0ms);
  will-change: opacity, transform;
}

.js-reveal [data-reveal].is-visible {
  opacity: 1;
  transform: translate3d(0, 0, 0);
}

/* ---------- 14. 响应式 ---------- */
@media (max-width: 1080px) {
  .login-caption {
    display: none;
  }
}

@media (max-width: 920px) {
  .header-inner {
    min-height: 64px;
    padding: 0.5rem 1rem;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    display: block;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    margin-left: 0;
    padding: 0.75rem 1.25rem 1.25rem;
    background: rgba(10, 20, 40, 0.98);
    border-bottom: 1px solid rgba(192, 199, 209, 0.2);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-6px);
    transition: opacity 0.24s ease, transform 0.24s var(--ease-out), visibility 0.24s ease;
  }

  .site-nav[data-open] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .nav-link {
    display: block;
    width: 100%;
    padding: 0.875rem 0.25rem;
    font-size: 1.0625rem;
    border-bottom: 1px solid rgba(192, 199, 209, 0.12);
  }

  .nav-link[aria-current="page"]::before {
    width: 6px;
    height: 6px;
    margin-right: 0.5rem;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
}

@media (max-width: 720px) {
  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 1.75rem;
    padding-top: 2.5rem;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 380px) {
  .login-entry {
    padding: 0.625rem 0.875rem;
  }

  .brand-tagline {
    letter-spacing: 0.18em;
  }
}

/* ---------- 15. 弱动态偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    transition-delay: 0ms !important;
  }

  .login-glow {
    animation: none;
    box-shadow: 0 0 10px rgba(249, 115, 22, 0.8);
  }

  .js-reveal [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .skip-link {
    transition: none;
  }
}