:root {
  --color-bg: #eef2ff;
  --color-surface: rgba(255, 255, 255, 0.78);
  --color-surface-strong: rgba(255, 255, 255, 0.92);
  --color-border: rgba(100, 116, 139, 0.16);
  --color-text: #111827;
  --color-muted: #4b5563;
  --color-primary: #165dff;
  --color-primary-soft: rgba(22, 93, 255, 0.12);
  --color-shadow: 0 30px 80px rgba(22, 93, 255, 0.08);
  --radius: 26px;
  --radius-sm: 18px;
  --transition: 0.28s ease;
  --max-width: 1280px;
  --surface-glass: rgba(255,255,255,0.72);
  --surface-blur: blur(18px);
  --font-sans: "Segoe UI", "ヒラギノ角ゴシック Pro", "Yu Gothic", "Meiryo", sans-serif;
  font-size: clamp(14px, 1vw + 0.4rem, 16px);
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  color: var(--color-text);
  background: radial-gradient(circle at top left, rgba(22, 93, 255, 0.12), transparent 24%),
              radial-gradient(circle at 80% 10%, rgba(22, 93, 255, 0.18), transparent 20%),
              linear-gradient(180deg, #f8fbff 0%, #eef2ff 45%, #f4f7ff 100%);
  line-height: 1.65;
  overflow-x: hidden;
}

body.theme-dark {
  --color-bg: #07101f;
  --color-surface: rgba(6, 17, 34, 0.84);
  --color-surface-strong: rgba(8, 20, 35, 0.96);
  --color-border: rgba(99, 125, 177, 0.18);
  --color-text: #e7eefc;
  --color-muted: #99a7c2;
  --color-primary-soft: rgba(22, 93, 255, 0.18);
  --color-shadow: 0 32px 90px rgba(0, 14, 52, 0.42);

  background: radial-gradient(circle at top left, rgba(22, 93, 255, 0.08), transparent 18%),
              radial-gradient(circle at 80% 10%, rgba(22, 93, 255, 0.12), transparent 16%),
              linear-gradient(180deg, #071120 0%, #0d1828 48%, #07101f 100%);
}

* {
  box-sizing: border-box;
  transition: 
    background-color var(--transition), 
    color var(--transition), 
    border-color var(--transition), 
    box-shadow var(--transition),
    fill var(--transition),
    stroke var(--transition);
}

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

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

button,
input,
textarea {
  font: inherit;
}

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

section {
  padding: clamp(3rem, 3vw, 5rem) 1rem;
}

.container {
  width: min(100%, calc(var(--max-width) - 2rem));
  margin: 0 auto;
}

/* ========== 顶部导航 深色适配 ========== */
.page-header {
  position: fixed;
  left: 0;
  right: 0;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(18px);
  padding: 1.1rem 1rem;
  background: rgba(255, 255, 255, 0.26);
  box-shadow: none;
  transition: background-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

body.theme-dark .page-header {
  background: rgba(8, 16, 30, 0.74);
}

.page-header.scrolled {
  background: var(--color-surface);
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.12);
  transform: translateY(-0.15rem);
}

body.theme-dark .page-header.scrolled {
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.3);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.header__brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.03em;
}

.header__brand span {
  display: block;
  font-size: clamp(0.9rem, 1vw, 1.1rem);
  color: var(--color-primary);
}

.header__brand strong {
  font-size: clamp(1.1rem, 1.5vw, 1.35rem);
}

.nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav__list {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav__link {
  position: relative;
  color: var(--color-muted);
  font-weight: 500;
  transition: color var(--transition);
}

.nav__link:hover,
.nav__link.is-active {
  color: var(--color-primary);
}

.nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.4rem;
  width: 100%;
  height: 2px;
  background: var(--color-primary);
  opacity: 0;
  transform: translateY(4px);
  transition: opacity var(--transition), transform var(--transition);
}

.nav__link.is-active::after,
.nav__link:hover::after {
  opacity: 1;
  transform: translateY(0);
}

/* ========== 主题切换按钮优化 ========== */
.theme-switch {
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  background: var(--color-surface-strong);
  color: var(--color-primary);
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: transform var(--transition), background var(--transition), color var(--transition), border-color var(--transition);
}

.theme-switch:hover {
  transform: rotate(20deg);
  background: var(--color-primary-soft);
}

body.theme-dark .theme-switch {
  border-color: rgba(99, 125, 177, 0.25);
}

.mobile-menu__toggle {
  display: none;
  width: 3.2rem;
  height: 3.2rem;
  border: none;
  background: var(--color-surface-strong);
  border-radius: 18px;
  color: var(--color-text);
  cursor: pointer;
}

.mobile-menu {
  display: none;
}

.mobile-menu__overlay,
.mobile-menu__panel {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  z-index: 30;
}

.mobile-menu__overlay {
  left: 0;
  background: rgba(7, 12, 24, 0.35);
  backdrop-filter: blur(8px);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}

.mobile-menu__panel {
  width: min(320px, 80%);
  background: var(--color-surface-strong);
  padding: 2rem 1.5rem;
  box-shadow: -16px 0 48px rgba(15, 23, 42, 0.15);
  transform: translateX(100%);
  transition: transform var(--transition);
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

body.theme-dark .mobile-menu__panel {
  box-shadow: -16px 0 48px rgba(0, 0, 0, 0.4);
}

.mobile-menu.open .mobile-menu__overlay {
  opacity: 1;
  pointer-events: all;
}

.mobile-menu.open .mobile-menu__panel {
  transform: translateX(0);
}

.mobile-menu__list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.mobile-menu__link {
  display: block;
  padding: 0.85rem 1rem;
  border-radius: 16px;
  color: var(--color-text);
  background: rgba(255,255,255,0.32);
}

body.theme-dark .mobile-menu__link {
  background: rgba(255,255,255,0.05);
}

.mobile-menu__link.is-active {
  background: var(--color-primary-soft);
  color: var(--color-primary);
}

.main {
  padding-top: 5.4rem;
}

/* ========== 英雄区 ========== */
.hero {
  position: relative;
  min-height: calc(100vh - 5.4rem);
  display: grid;
  grid-template-columns: 1.15fr 0.95fr;
  align-items: center;
  gap: 2rem;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 20% 20%, rgba(22, 93, 255, 0.14), transparent 15%),
              radial-gradient(circle at 85% 20%, rgba(22, 93, 255, 0.1), transparent 12%);
  pointer-events: none;
  z-index: 0;
}

.hero__content,
.hero__media {
  position: relative;
  z-index: 1;
}

.hero__title {
  margin: 0;
  font-size: clamp(2.5rem, 4vw, 4.2rem);
  line-height: 0.95;
}

.hero__subtitle {
  margin: 1rem 0 0.75rem;
  font-size: clamp(1.1rem, 1.5vw, 1.4rem);
  color: var(--color-primary);
}

.hero__slogan {
  max-width: 38rem;
  margin: 0;
  font-size: clamp(1rem, 1.2vw, 1.15rem);
  color: var(--color-muted);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3.4rem;
  padding: 0 1.4rem;
  border: none;
  border-radius: 999px;
  cursor: pointer;
  transition: transform var(--transition), background-color var(--transition), box-shadow var(--transition), color var(--transition);
  font-weight: 600;
  letter-spacing: 0.01em;
  background: var(--color-primary);
  color: #fff;
}

.button--secondary {
  background: transparent;
  color: var(--color-text);
  border: 1px solid rgba(22, 93, 255, 0.28);
}

.button:hover {
  transform: translateY(-1px);
}

.button--secondary:hover {
  background: var(--color-primary-soft);
}

.hero__image {
  display: grid;
  place-items: center;
  padding: 2rem;
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255,255,255,0.92), rgba(255,255,255,0.7));
  border: 1px solid rgba(22, 93, 255, 0.08);
  box-shadow: var(--color-shadow);
}

body.theme-dark .hero__image {
  background: linear-gradient(180deg, rgba(15, 25, 45, 0.92), rgba(10, 18, 35, 0.7));
  border-color: rgba(22, 93, 255, 0.15);
}

.hero__image img {
  width: min(100%, 24rem);
  border-radius: 24px;
  transform: translateY(0);
  transition: transform 0.4s ease;
}

.hero__image:hover img {
  transform: translateY(-0.5rem) scale(1.01);
}

.section {
  position: relative;
}

.section__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2rem;
}

.section__title {
  margin: 0;
  font-size: clamp(1.75rem, 2.2vw, 2.7rem);
}

.section__subtitle {
  margin: 0;
  color: var(--color-muted);
  max-width: 38rem;
}

.card-grid {
  display: grid;
  gap: 1.5rem;
}

/* ========== 特色卡片 深色适配 ========== */
.feature-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.feature-card {
  position: relative;
  padding: 2rem;
  border-radius: var(--radius);
  background: var(--color-surface);
  border: 1px solid rgba(22, 93, 255, 0.08);
  box-shadow: var(--color-shadow);
  overflow: hidden;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

body.theme-dark .feature-card {
  border-color: rgba(22, 93, 255, 0.15);
}

.feature-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at top left, rgba(22, 93, 255, 0.14), transparent 28%);
  opacity: 0;
  transition: opacity var(--transition);
}

.feature-card:hover {
  transform: translateY(-0.5rem) rotateX(1deg) rotateY(1deg);
  border-color: rgba(22, 93, 255, 0.22);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-card__icon {
  width: 3rem;
  height: 3rem;
  margin-bottom: 1.25rem;
  display: grid;
  place-items: center;
  border-radius: 18px;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  font-size: 1.5rem;
}

.feature-card__title {
  margin: 0 0 0.75rem;
  font-size: 1.15rem;
}

.feature-card__text {
  margin: 0;
  color: var(--color-muted);
}

/* ========== 统计卡片 深色适配 ========== */
.counter-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.counter-card {
  padding: 1.75rem;
  border-radius: var(--radius);
  background: var(--color-surface);
  border: 1px solid rgba(22, 93, 255, 0.1);
  text-align: center;
  box-shadow: var(--color-shadow);
}

body.theme-dark .counter-card {
  border-color: rgba(22, 93, 255, 0.15);
}

.counter-card__value {
  margin: 0;
  font-size: clamp(2rem, 3vw, 3rem);
  font-weight: 700;
  color: var(--color-primary);
}

.counter-card__label {
  margin: 0.75rem 0 0;
  color: var(--color-muted);
}

/* ========== 项目卡片 深色适配 ========== */
.project-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.25rem;
  overflow: hidden;
  scroll-behavior: smooth;
}

.project-card {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--color-surface);
  border: 1px solid rgba(22, 93, 255, 0.1);
  box-shadow: var(--color-shadow);
}

body.theme-dark .project-card {
  border-color: rgba(22, 93, 255, 0.15);
}

.project-card__image {
  position: relative;
  overflow: hidden;
}

.project-card__image img {
  width: 100%;
  transition: transform var(--transition);
}

.project-card:hover .project-card__image img {
  transform: scale(1.05);
}

.project-card__body {
  padding: 1.5rem;
}

.project-card__tag {
  display: inline-flex;
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  font-size: 0.85rem;
  color: var(--color-primary);
  background: var(--color-primary-soft);
}

.project-card__title {
  margin: 1rem 0 0.75rem;
  font-size: 1.15rem;
}

.project-card__text {
  margin: 0;
  color: var(--color-muted);
}

.project-card__more {
  display: inline-flex;
  margin-top: 1rem;
  color: var(--color-primary);
  font-weight: 600;
}

/* ========== CTA横幅 深色适配 ========== */
.cta-banner {
  position: relative;
  overflow: hidden;
  padding: clamp(2.5rem, 3vw, 4rem) 2rem;
  border-radius: var(--radius);
  background: radial-gradient(circle at top, rgba(22, 93, 255, 0.18), transparent 28%),
              linear-gradient(135deg, rgba(22, 93, 255, 0.16), rgba(255, 255, 255, 0.12));
  border: 1px solid rgba(22, 93, 255, 0.12);
  box-shadow: var(--color-shadow);
}

body.theme-dark .cta-banner {
  background: radial-gradient(circle at top, rgba(22, 93, 255, 0.14), transparent 28%),
              linear-gradient(135deg, rgba(22, 93, 255, 0.12), rgba(0, 0, 0, 0.1));
  border-color: rgba(22, 93, 255, 0.18);
}

.cta-banner__title {
  margin: 0 0 1rem;
  font-size: clamp(1.75rem, 2.5vw, 2.8rem);
}

.cta-banner__action {
  display: inline-flex;
}

/* ========== Tab面板 深色适配 ========== */
.tab-panel {
  background: var(--color-surface);
  border-radius: var(--radius);
  border: 1px solid rgba(22, 93, 255, 0.08);
  box-shadow: var(--color-shadow);
}

body.theme-dark .tab-panel {
  border-color: rgba(22, 93, 255, 0.15);
}

.tab-panel__content [data-panel] {
  display: none;
}

.tab-panel__content [data-panel].is-visible {
  display: block;
}

.tabs {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  padding: 1.25rem;
  border-bottom: 1px solid rgba(100, 116, 139, 0.14);
}

body.theme-dark .tabs {
  border-bottom-color: rgba(99, 125, 177, 0.18);
}

.tab {
  position: relative;
  padding: 0.9rem 1.25rem;
  border-radius: 999px;
  cursor: pointer;
  color: var(--color-muted);
  transition: background var(--transition), color var(--transition);
}

.tab::after {
  content: '';
  position: absolute;
  bottom: -0.5rem;
  left: 1rem;
  right: 1rem;
  height: 2px;
  border-radius: 999px;
  background: transparent;
  transition: background var(--transition);
}

.tab.is-active {
  color: var(--color-primary);
  background: var(--color-primary-soft);
}

.tab.is-active::after {
  background: var(--color-primary);
}

.tab-panel__content {
  padding: 2rem;
}

/* ========== 个人资料 深色适配 ========== */
.profile-section {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 2rem;
  align-items: start;
}

.profile-card {
  padding: 1.75rem;
  border-radius: var(--radius);
  background: var(--color-surface);
  border: 1px solid rgba(22, 93, 255, 0.08);
}

body.theme-dark .profile-card {
  border-color: rgba(22, 93, 255, 0.15);
}

.profile-badge {
  display: inline-flex;
  gap: 0.75rem;
  align-items: center;
  margin-bottom: 1rem;
  color: var(--color-primary);
  font-weight: 700;
}

.profile-card__grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.profile-card__item {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
}

.profile-card__item strong {
  display: block;
  min-width: 5.5rem;
  color: var(--color-text);
}

.profile-card__item span {
  color: var(--color-muted);
}

.profile-image {
  padding: 2rem;
  border-radius: var(--radius);
  background: var(--color-surface);
  border: 1px solid rgba(22, 93, 255, 0.08);
  text-align: center;
}

body.theme-dark .profile-image {
  border-color: rgba(22, 93, 255, 0.15);
}

.profile-image img {
  width: 100%;
  max-width: 20rem;
  border-radius: 24px;
}

/* ========== 技能进度条 深色适配 ========== */
.skill-grid {
  display: grid;
  gap: 1.25rem;
}

.skill-section {
  display: grid;
  gap: 1rem;
}

.skill-item {
  display: grid;
  gap: 0.5rem;
}

.skill-item__head {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  color: var(--color-muted);
}

.progress {
  position: relative;
  width: 100%;
  height: 0.85rem;
  border-radius: 999px;
  background: var(--color-primary-soft);
  overflow: hidden;
}

.progress__fill {
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, #2959ff, #1db7ff);
  border-radius: inherit;
  transition: width 0.88s ease;
}

/* ========== 兴趣卡片 深色适配 ========== */
.interest-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
}

.interest-card {
  position: relative;
  padding: 2rem;
  border-radius: var(--radius);
  background: var(--color-surface);
  border: 1px solid rgba(22, 93, 255, 0.08);
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition);
}

body.theme-dark .interest-card {
  border-color: rgba(22, 93, 255, 0.15);
}

.interest-card:hover {
  transform: translateY(-0.6rem) rotate(-0.2deg);
  box-shadow: 0 30px 60px rgba(22, 93, 255, 0.08);
}

body.theme-dark .interest-card:hover {
  box-shadow: 0 30px 60px rgba(0, 14, 52, 0.35);
}

.interest-card__icon {
  width: 3rem;
  height: 3rem;
  margin: 0 auto 1rem;
  display: grid;
  place-items: center;
  border-radius: 18px;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  font-size: 1.5rem;
}

.interest-card__title {
  margin: 0;
  font-weight: 700;
}

/* ========== 作品筛选 深色适配 ========== */
.portfolio-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 2rem;
}

.filter-button {
  padding: 0.75rem 1.2rem;
  border-radius: 999px;
  border: 1px solid rgba(22, 93, 255, 0.14);
  background: var(--color-surface);
  color: var(--color-muted);
  cursor: pointer;
  transition: background var(--transition), color var(--transition), transform var(--transition);
}

body.theme-dark .filter-button {
  border-color: rgba(22, 93, 255, 0.2);
}

.filter-button.is-active,
.filter-button:hover {
  background: var(--color-primary-soft);
  color: var(--color-primary);
}

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

.project-card__meta {
  display: inline-flex;
  gap: 0.5rem;
  align-items: center;
  margin-bottom: 0.75rem;
  font-size: 0.95rem;
  color: var(--color-primary);
}

.project-card--hidden {
  opacity: 0;
  transform: scale(0.98);
  height: 0;
  padding: 0;
  margin: 0;
  overflow: hidden;
  pointer-events: none;
}

/* ========== 模态框 深色适配 ========== */
.modal {
  position: fixed;
  inset: 0;
  z-index: 40;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  background: rgba(7, 10, 24, 0.7);
}

.modal.open {
  display: flex;
}

.modal__dialog {
  width: min(100%, 760px);
  max-height: calc(100vh - 4rem);
  overflow: auto;
  border-radius: var(--radius);
  background: var(--color-surface-strong);
  border: 1px solid rgba(255, 255, 255, 0.06);
  box-shadow: 0 40px 120px rgba(0, 0, 0, 0.35);
  animation: popIn 0.32s ease;
}

body.theme-dark .modal__dialog {
  border-color: rgba(22, 93, 255, 0.15);
}

@keyframes popIn {
  from { opacity: 0; transform: translateY(1.5rem) scale(0.95); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.modal__header,
.modal__body {
  padding: 1.5rem 1.75rem;
}

.modal__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  border-bottom: 1px solid rgba(100, 116, 139, 0.14);
}

body.theme-dark .modal__header {
  border-bottom-color: rgba(99, 125, 177, 0.18);
}

.modal__title {
  margin: 0;
  font-size: 1.4rem;
}

.modal__close {
  width: 3rem;
  height: 3rem;
  border: none;
  border-radius: 50%;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  cursor: pointer;
}

.modal__image {
  width: 100%;
  height: 16rem;
  object-fit: cover;
  border-bottom: 1px solid rgba(100, 116, 139, 0.14);
}

body.theme-dark .modal__image {
  border-bottom-color: rgba(99, 125, 177, 0.18);
}

.modal__carousel {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid rgba(100, 116, 139, 0.14);
}

body.theme-dark .modal__carousel {
  border-bottom-color: rgba(99, 125, 177, 0.18);
}

.carousel__track {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 100%;
  transition: transform 0.35s ease;
}

.carousel__slide {
  min-height: 16rem;
}

.carousel__slide img {
  width: 100%;
  height: 16rem;
  object-fit: cover;
  display: block;
}

.carousel__control {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 2.9rem;
  height: 2.9rem;
  border: none;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.92);
  color: var(--color-primary);
  cursor: pointer;
  display: grid;
  place-items: center;
  box-shadow: 0 12px 28px rgba(15, 23, 42, 0.18);
}

.carousel__control--prev {
  left: 1rem;
}

.carousel__control--next {
  right: 1rem;
}

.carousel__dots {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  padding: 1rem 0;
}

.carousel__dot {
  width: 0.85rem;
  height: 0.85rem;
  border-radius: 50%;
  border: none;
  background: rgba(100, 116, 139, 0.3);
  cursor: pointer;
}

body.theme-dark .carousel__dot {
  background: rgba(99, 125, 177, 0.3);
}

.carousel__dot.is-active {
  background: var(--color-primary);
}

.modal__section-title {
  margin: 1.5rem 0 0.75rem;
  font-size: 1rem;
  color: var(--color-text);
}

.modal__overview,
.modal__benefits {
  margin: 0;
  color: var(--color-muted);
}

.modal__features {
  margin: 0;
  padding-left: 1.25rem;
  display: grid;
  gap: 0.6rem;
  color: var(--color-muted);
}

.modal__features li {
  list-style: disc;
}

.modal__details {
  display: grid;
  gap: 1rem;
}

.modal__tag {
  display: inline-flex;
  padding: 0.45rem 0.9rem;
  border-radius: 999px;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  font-size: 0.85rem;
}

/* ========== 时间轴 深色适配 ========== */
.timeline {
  display: grid;
  gap: 1rem;
}

.timeline__item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  padding: 1.5rem;
  border-radius: var(--radius);
  background: var(--color-surface);
  border: 1px solid rgba(22, 93, 255, 0.08);
  cursor: pointer;
}

body.theme-dark .timeline__item {
  border-color: rgba(22, 93, 255, 0.15);
}

.timeline__marker {
  position: relative;
  width: 2.5rem;
  min-width: 2.5rem;
  display: grid;
  place-items: center;
}

.timeline__dot {
  width: 1rem;
  height: 1rem;
  border-radius: 50%;
  background: var(--color-primary);
  box-shadow: 0 0 0 rgba(22, 93, 255, 0.35);
  animation: pulse 2.4s infinite ease-in-out;
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(22, 93, 255, 0.28); }
  50% { box-shadow: 0 0 0.75rem 0 rgba(22, 93, 255, 0.14); }
}

.timeline__content {
  display: grid;
  gap: 0.75rem;
}

.timeline__title {
  margin: 0;
  font-size: 1.1rem;
}

.timeline__body {
  margin: 0;
  color: var(--color-muted);
}

.timeline__details {
  display: none;
  gap: 0.5rem;
  color: var(--color-muted);
}

.timeline__item.is-open .timeline__details {
  display: grid;
}

.honor-list,
.result-tags {
  display: grid;
  gap: 1rem;
}

/* ========== 手风琴 深色适配 ========== */
.accordion-item {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid rgba(22, 93, 255, 0.08);
  background: var(--color-surface);
}

body.theme-dark .accordion-item {
  border-color: rgba(22, 93, 255, 0.15);
}

.accordion-item__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.2rem 1.3rem;
  cursor: pointer;
}

.accordion-item__title {
  margin: 0;
  font-weight: 700;
}

.accordion-item__body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.32s ease;
  padding: 0 1.3rem;
  color: var(--color-muted);
}

.accordion-item.is-open .accordion-item__body {
  max-height: 18rem;
  padding: 0 1.3rem 1.2rem;
}

/* ========== 标签云 深色适配 ========== */
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.tag {
  padding: 0.75rem 1rem;
  border-radius: 999px;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  font-size: 0.95rem;
}

/* ========== 联系表单 深色适配 ========== */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.contact-card {
  display: grid;
  gap: 1rem;
  padding: 1.5rem;
  border-radius: var(--radius);
  background: var(--color-surface);
  border: 1px solid rgba(22, 93, 255, 0.08);
  transition: transform var(--transition), border-color var(--transition), background var(--transition);
}

body.theme-dark .contact-card {
  border-color: rgba(22, 93, 255, 0.15);
}

.contact-card:hover {
  transform: translateX(-0.3rem);
  border-color: rgba(22, 93, 255, 0.22);
  background: rgba(255,255,255,0.9);
}

body.theme-dark .contact-card:hover {
  background: rgba(255,255,255,0.05);
}

.contact-card__title {
  margin: 0;
  font-weight: 700;
}

.contact-card__text {
  margin: 0;
  color: var(--color-muted);
}

.contact-form {
  display: grid;
  gap: 1rem;
  padding: 1.5rem;
  border-radius: var(--radius);
  background: var(--color-surface);
  border: 1px solid rgba(22, 93, 255, 0.08);
}

body.theme-dark .contact-form {
  border-color: rgba(22, 93, 255, 0.15);
}

.form-control {
  position: relative;
  display: grid;
  gap: 0.5rem;
}

.form-control__label {
  position: absolute;
  top: 0.9rem;
  left: 1rem;
  color: var(--color-muted);
  pointer-events: none;
  transition: transform var(--transition), font-size var(--transition), color var(--transition);
}

.form-control--filled .form-control__label,
.form-control__input:focus + .form-control__label,
.form-control__textarea:focus + .form-control__label {
  transform: translateY(-1.5rem);
  font-size: 0.85rem;
  color: var(--color-primary);
}

.form-control__input,
.form-control__textarea {
  width: 100%;
  border: 1px solid var(--color-border);
  border-radius: 18px;
  padding: 1.2rem 1rem;
  background: transparent;
  color: var(--color-text);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-control__input:focus,
.form-control__textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgba(22, 93, 255, 0.08);
}

.form-control__input--invalid,
.form-control__textarea--invalid {
  border-color: #f44336;
}

.form-control__feedback {
  color: #f44336;
  font-size: 0.9rem;
  min-height: 1.1rem;
}

.form-control__status {
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-primary);
  font-size: 1rem;
}

.form-actions {
  display: flex;
  justify-content: flex-end;
}

.form-status {
  position: fixed;
  inset: auto 1rem 1rem auto;
  z-index: 50;
  background: var(--color-surface-strong);
  border-radius: 18px;
  padding: 1rem 1.25rem;
  border: 1px solid rgba(22, 93, 255, 0.14);
  box-shadow: var(--color-shadow);
  display: none;
}

.form-status.open {
  display: inline-flex;
}

.section--wide {
  padding-top: 5rem;
}

/* ========== 页脚 深色适配优化 ========== */
.footer {
  margin-top: 4rem;
  background: rgba(255,255,255,0.72);
  border-top: 1px solid rgba(22, 93, 255, 0.12);
}

body.theme-dark .footer {
  background: rgba(8, 16, 33, 0.88);
  border-top-color: rgba(22, 93, 255, 0.15);
}

.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 2rem 0;
}

.footer__social {
  display: flex;
  gap: 1rem;
}

.footer__link {
  display: inline-flex;
  width: 3rem;
  height: 3rem;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: var(--color-surface);
  border: 1px solid rgba(22, 93, 255, 0.08);
  color: var(--color-text);
  transition: transform var(--transition), background var(--transition), color var(--transition);
}

body.theme-dark .footer__link {
  border-color: rgba(22, 93, 255, 0.15);
}

.footer__link:hover {
  transform: translateY(-0.2rem);
  background: var(--color-primary-soft);
  color: var(--color-primary);
}

/* ========== 返回顶部 深色适配 ========== */
.back-to-top {
  position: fixed;
  right: 1.5rem;
  bottom: 1.5rem;
  width: 3.4rem;
  height: 3.4rem;
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: 50%;
  opacity: 0;
  transform: translateY(1rem);
  transition: opacity var(--transition), transform var(--transition);
  z-index: 25;
  display: grid;
  place-items: center;
  cursor: pointer;
}

.back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
}

.back-to-top:hover {
  transform: translateY(-0.2rem);
}

/* ========== 滚动动画 ========== */
.fade-up,
.fade-in {
  opacity: 0;
  transform: translateY(1rem);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ========== 响应式 ========== */
@media (max-width: 1439px) {
  .feature-grid,
  .project-grid,
  .project-strip,
  .counter-grid,
  .interest-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 1023px) {
  .hero {
    grid-template-columns: 1fr;
    padding-top: 2rem;
  }
  .header__inner,
  .footer__inner {
    flex-wrap: wrap;
  }
  .profile-section,
  .skill-grid,
  .contact-grid,
  .profile-card__grid,
  .timeline {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 767px) {
  .page-header {
    padding: 0.85rem 1rem;
  }
  .header__brand {
    gap: 0.5rem;
  }
  .nav {
    display: none;
  }
  .theme-switch {
    display: none;
  }
  .mobile-menu__toggle {
    display: inline-flex;
  }
  .hero__title {
    font-size: clamp(2rem, 7vw, 2.7rem);
  }
  .hero__subtitle,
  .hero__slogan {
    font-size: clamp(1rem, 2.5vw, 1.1rem);
  }
  section {
    padding: 2rem 1rem;
  }
  .feature-grid,
  .counter-grid,
  .project-grid,
  .interest-grid {
    grid-template-columns: 1fr;
  }
  .project-strip {
    grid-template-columns: repeat(3, minmax(80vw, calc(100% - 2rem)));
    grid-auto-flow: column;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    padding-bottom: 0.5rem;
  }
  .project-card {
    scroll-snap-align: start;
    min-width: 80vw;
  }
  .profile-image img,
  .hero__image img {
    max-width: 100%;
  }
  .contact-form,
  .contact-card,
  .profile-card,
  .timeline__item {
    padding: 1.25rem;
  }
  .footer__inner {
    flex-direction: column;
    align-items: flex-start;
  }
}