/* ============================================
   寿德康 Shoudkang - 公司官网样式
   ============================================ */

/* --- CSS Variables --- */
:root {
  --color-primary: #4A90D9;
  --color-primary-dark: #3A7BC8;
  --color-primary-light: #6BA8E8;
  --color-accent: #E8965A;
  --color-accent-light: #F0B88A;
  --color-warm: #D4785A;
  --color-success: #5CB85C;

  --color-bg: #FAFBFE;
  --color-bg-alt: #F0F4FA;
  --color-bg-card: #FFFFFF;
  --color-bg-dark: #1A2332;
  --color-bg-footer: #141C28;

  --color-text: #2C3E50;
  --color-text-light: #6B7C93;
  --color-text-muted: #9BA8B7;
  --color-text-white: #F8F9FA;

  --color-border: #E2E8F0;
  --color-border-light: #EDF2F7;

  --gradient-primary: linear-gradient(135deg, #4A90D9 0%, #6BA8E8 50%, #E8965A 100%);
  --gradient-hero: linear-gradient(135deg, #EBF4FF 0%, #FFF5EB 50%, #F0F4FA 100%);
  --gradient-card: linear-gradient(135deg, #FFFFFF 0%, #F8FBFF 100%);

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.12);
  --shadow-glow: 0 0 40px rgba(74, 144, 217, 0.15);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;

  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", system-ui, -apple-system, sans-serif;

  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);

  --container-max: 1200px;
  --header-height: 72px;
}

/* --- Reset & Base --- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.7;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

ul, ol {
  list-style: none;
}

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

.text-gradient {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  border-radius: var(--radius-full);
  font-size: 1rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  gap: 8px;
  letter-spacing: 0.02em;
}

.btn--primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: 0 4px 16px rgba(74, 144, 217, 0.3);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(74, 144, 217, 0.4);
}

.btn--outline {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn--outline:hover {
  background: var(--color-primary);
  color: white;
  transform: translateY(-2px);
}

/* --- Header --- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  z-index: 1000;
  background: rgba(250, 251, 254, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
  transition: all var(--transition-base);
}

.header--scrolled {
  border-bottom-color: var(--color-border-light);
  box-shadow: var(--shadow-sm);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

/* --- Logo --- */
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--color-primary);
  flex-shrink: 0;
}

.logo__icon {
  width: 36px;
  height: 36px;
}

.logo__text {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--color-text);
}

.logo__sub {
  display: block;
  font-size: 0.65rem;
  font-weight: 400;
  color: var(--color-text-muted);
  letter-spacing: 0.08em;
  margin-top: -2px;
}

/* --- Navigation --- */
.nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav__link {
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-light);
  transition: all var(--transition-fast);
  position: relative;
}

.nav__link:hover,
.nav__link.active {
  color: var(--color-primary);
  background: rgba(74, 144, 217, 0.08);
}

/* --- Nav Toggle (Mobile) --- */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 1001;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.nav-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* --- Hero --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: calc(var(--header-height) + 40px) 0 60px;
  overflow: hidden;
  background: var(--gradient-hero);
}

.hero__bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.hero__shape {
  position: absolute;
  border-radius: 50%;
  opacity: 0.5;
  animation: float 20s ease-in-out infinite;
}

.hero__shape--1 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(74, 144, 217, 0.12) 0%, transparent 70%);
  top: -100px;
  right: -100px;
  animation-delay: 0s;
}

.hero__shape--2 {
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(232, 150, 90, 0.1) 0%, transparent 70%);
  bottom: -50px;
  left: -80px;
  animation-delay: -5s;
}

.hero__shape--3 {
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(74, 144, 217, 0.08) 0%, transparent 70%);
  top: 40%;
  left: 15%;
  animation-delay: -10s;
}

.hero__shape--4 {
  width: 250px;
  height: 250px;
  background: radial-gradient(circle, rgba(232, 150, 90, 0.08) 0%, transparent 70%);
  top: 20%;
  right: 20%;
  animation-delay: -15s;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  25% { transform: translate(20px, -30px) scale(1.05); }
  50% { transform: translate(-10px, 20px) scale(0.95); }
  75% { transform: translate(15px, 10px) scale(1.02); }
}

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

.hero__badge {
  display: inline-flex;
  align-items: center;
  padding: 8px 20px;
  background: rgba(74, 144, 217, 0.1);
  color: var(--color-primary);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 24px;
  border: 1px solid rgba(74, 144, 217, 0.15);
  animation: fadeInUp 0.8s ease-out;
}

.hero__title {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
  animation: fadeInUp 0.8s ease-out 0.15s both;
}

.hero__desc {
  font-size: 1.125rem;
  color: var(--color-text-light);
  max-width: 600px;
  margin: 0 auto 40px;
  line-height: 1.8;
  animation: fadeInUp 0.8s ease-out 0.3s both;
}

.hero__actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  animation: fadeInUp 0.8s ease-out 0.45s both;
}

.hero__stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 48px;
  margin-top: 60px;
  animation: fadeInUp 0.8s ease-out 0.6s both;
}

.hero__stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.hero__stat-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-card);
  border-radius: var(--radius-md);
  color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

.hero__stat-icon svg {
  width: 22px;
  height: 22px;
}

.hero__stat-text {
  font-size: 0.85rem;
  color: var(--color-text-light);
  font-weight: 500;
}

.hero__scroll {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  animation: bounce 2s infinite;
}

.hero__scroll-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.hero__scroll-btn:hover {
  color: var(--color-primary);
}

.hero__scroll-btn svg {
  width: 24px;
  height: 24px;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
  40% { transform: translateX(-50%) translateY(-10px); }
  60% { transform: translateX(-50%) translateY(-5px); }
}

/* --- Section Base --- */
.section {
  padding: 100px 0;
}

.section__header {
  text-align: center;
  margin-bottom: 64px;
}

.section__tag {
  display: inline-block;
  padding: 4px 14px;
  background: rgba(74, 144, 217, 0.08);
  color: var(--color-primary);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.section__title {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 800;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.section__subtitle {
  font-size: 1.1rem;
  color: var(--color-text-light);
}

/* --- About --- */
.about {
  background: var(--color-bg);
}

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

.about__card {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  border: 1px solid var(--color-border-light);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.about__card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.about__card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.about__card:hover::before {
  opacity: 1;
}

.about__card-icon {
  width: 48px;
  height: 48px;
  margin-bottom: 20px;
  color: var(--color-primary);
}

.about__card--mission .about__card-icon {
  color: var(--color-accent);
}

.about__card--vision .about__card-icon {
  color: var(--color-warm);
}

.about__card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.about__card p {
  color: var(--color-text-light);
  line-height: 1.8;
  font-size: 0.95rem;
}

/* --- Services --- */
.services {
  background: var(--color-bg-alt);
}

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

.service-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  border: 1px solid var(--color-border-light);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.service-card--featured {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-rows: auto auto auto;
  gap: 0 32px;
  background: var(--gradient-card);
  border: 2px solid rgba(74, 144, 217, 0.15);
}

.service-card--featured .service-card__icon {
  grid-row: 1 / 3;
  align-self: start;
}

.service-card__badge {
  position: absolute;
  top: 16px;
  right: 16px;
  padding: 4px 12px;
  background: rgba(92, 184, 92, 0.1);
  color: var(--color-success);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
}

.service-card--featured .service-card__badge {
  position: static;
  display: inline-block;
  margin-bottom: 12px;
  grid-column: 2;
}

.service-card__badge--soon {
  background: rgba(232, 150, 90, 0.1);
  color: var(--color-accent);
}

.service-card__icon {
  width: 64px;
  height: 64px;
  color: var(--color-primary);
  margin-bottom: 20px;
  flex-shrink: 0;
}

.service-card--featured .service-card__icon {
  width: 80px;
  height: 80px;
}

.service-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.service-card p {
  color: var(--color-text-light);
  line-height: 1.8;
  font-size: 0.95rem;
}

.service-card__features {
  margin-top: 20px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  grid-column: 2;
}

.service-card__features li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--color-text-light);
}

.service-card__features li::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-primary);
  flex-shrink: 0;
}

/* --- Values --- */
.values {
  background: var(--color-bg);
}

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

.value-card {
  display: flex;
  gap: 24px;
  padding: 36px 32px;
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-light);
  transition: all var(--transition-base);
}

.value-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.value-card__number {
  font-size: 3rem;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  flex-shrink: 0;
  opacity: 0.6;
}

.value-card__content h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.value-card__content p {
  color: var(--color-text-light);
  line-height: 1.8;
  font-size: 0.95rem;
}

/* --- Numbers --- */
.numbers {
  padding: 80px 0;
  background: var(--color-bg-dark);
  color: var(--color-text-white);
}

.numbers__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: center;
}

.number-card {
  position: relative;
}

.number-card__value {
  font-size: 3rem;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: inline;
  line-height: 1.2;
}

.number-card__suffix {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-primary-light);
  display: inline;
}

.number-card__label {
  margin-top: 8px;
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

/* --- Diary --- */
.diary {
  background: var(--color-bg);
}

.diary__intro {
  display: flex;
  align-items: flex-start;
  gap: 24px;
  padding: 32px 36px;
  background: linear-gradient(135deg, #FFF9F5 0%, #F5F0FF 50%, #F0F7FF 100%);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(232, 150, 90, 0.15);
  margin-bottom: 48px;
}

.diary__intro-icon {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
  color: var(--color-accent);
}

.diary__intro-text h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.diary__intro-text p {
  font-size: 0.95rem;
  color: var(--color-text-light);
  line-height: 1.8;
}

.diary__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}

.diary-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: 28px;
  border: 1px solid var(--color-border-light);
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
  cursor: default;
  position: relative;
  overflow: hidden;
}

.diary-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.diary-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.diary-card:hover::after {
  opacity: 1;
}

.diary-card--large {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: auto auto 1fr;
  gap: 0 32px;
  padding: 36px;
  background: linear-gradient(135deg, #FFFFFF 0%, #FEFCFA 100%);
  border: 2px solid rgba(232, 150, 90, 0.12);
}

.diary-card--large .diary-card__meta {
  grid-column: 1 / -1;
}

.diary-card--large .diary-card__title {
  font-size: 1.4rem;
  grid-column: 1;
}

.diary-card--large .diary-card__excerpt {
  grid-column: 1;
  font-size: 1rem;
}

.diary-card--large .diary-card__footer {
  grid-column: 1;
}

.diary-card__meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}

.diary-card__tag {
  display: inline-flex;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.diary-card__tag--life {
  background: rgba(74, 144, 217, 0.1);
  color: var(--color-primary);
}

.diary-card__tag--growth {
  background: rgba(232, 150, 90, 0.1);
  color: var(--color-accent);
}

.diary-card__tag--rehab {
  background: rgba(92, 184, 92, 0.1);
  color: var(--color-success);
}

.diary-card__date {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.diary-card__date svg {
  width: 14px;
  height: 14px;
}

.diary-card__title {
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1.5;
  margin-bottom: 10px;
  color: var(--color-text);
  transition: color var(--transition-fast);
}

.diary-card:hover .diary-card__title {
  color: var(--color-primary);
}

.diary-card__excerpt {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.8;
  flex-grow: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.diary-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--color-border-light);
}

.diary-card__read-time {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.diary-card__read-time svg {
  width: 14px;
  height: 14px;
}

.diary__more {
  text-align: center;
  padding: 40px 32px;
  background: var(--gradient-card);
  border-radius: var(--radius-lg);
  border: 1px dashed var(--color-border);
}

.diary__more-text {
  font-size: 1rem;
  color: var(--color-text-light);
  margin-bottom: 20px;
}

.diary__wechat-hint {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 12px 28px;
  background: rgba(92, 184, 92, 0.08);
  border-radius: var(--radius-full);
  font-size: 0.95rem;
  color: var(--color-text);
  border: 1px solid rgba(92, 184, 92, 0.15);
}

.diary__wechat-icon {
  width: 28px;
  height: 28px;
  color: #07C160;
  flex-shrink: 0;
}

.diary__wechat-icon svg {
  width: 100%;
  height: 100%;
}

.diary__wechat-hint strong {
  color: #07C160;
  font-weight: 700;
}

/* --- Contact --- */
.contact {
  background: var(--color-bg-alt);
}

.contact__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.contact__info {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact__item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px;
  background: var(--color-bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-light);
  transition: all var(--transition-fast);
}

.contact__item:hover {
  box-shadow: var(--shadow-md);
  border-color: transparent;
}

.contact__item-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(74, 144, 217, 0.1);
  border-radius: var(--radius-sm);
  color: var(--color-primary);
  flex-shrink: 0;
}

.contact__item-icon svg {
  width: 20px;
  height: 20px;
}

.contact__item h4 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.contact__item p {
  font-size: 0.9rem;
  color: var(--color-text-light);
}

.contact__message-box {
  margin-top: 12px;
  padding: 32px;
  background: var(--gradient-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-light);
}

.contact__message-box h4 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.contact__message-box p {
  color: var(--color-text-light);
  margin-bottom: 20px;
  line-height: 1.7;
  font-size: 0.95rem;
}

.contact__visual {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 400px;
}

.contact__art {
  position: relative;
  width: 300px;
  height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.contact__art-circle {
  position: absolute;
  border-radius: 50%;
  border: 2px solid;
  animation: pulse-ring 4s ease-in-out infinite;
}

.contact__art-circle--1 {
  width: 100%;
  height: 100%;
  border-color: rgba(74, 144, 217, 0.15);
  animation-delay: 0s;
}

.contact__art-circle--2 {
  width: 75%;
  height: 75%;
  border-color: rgba(232, 150, 90, 0.15);
  animation-delay: -1.3s;
}

.contact__art-circle--3 {
  width: 50%;
  height: 50%;
  border-color: rgba(74, 144, 217, 0.2);
  animation-delay: -2.6s;
}

@keyframes pulse-ring {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.05); opacity: 0.7; }
}

.contact__art-text {
  position: relative;
  z-index: 1;
  color: var(--color-primary);
}

.contact__art-text svg {
  width: 120px;
  height: 120px;
}

/* --- Footer --- */
.footer {
  background: var(--color-bg-dark);
  color: var(--color-text-muted);
  padding-top: 64px;
}

.footer__top {
  display: flex;
  justify-content: space-between;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer__brand {
  max-width: 360px;
}

.logo--footer {
  color: var(--color-primary-light);
  margin-bottom: 16px;
}

.logo--footer .logo__text {
  color: var(--color-text-white);
}

.footer__desc {
  font-size: 0.9rem;
  line-height: 1.7;
  margin-top: 16px;
}

.footer__links {
  display: flex;
  gap: 64px;
}

.footer__col {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer__col h4 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text-white);
  margin-bottom: 8px;
}

.footer__col a {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.footer__col a:hover {
  color: var(--color-primary-light);
}

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 0;
  gap: 16px;
}

.footer__copyright {
  font-size: 0.85rem;
}

.footer__legal {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.85rem;
}

.footer__legal a:hover {
  color: var(--color-primary-light);
}

.footer__divider {
  opacity: 0.3;
}

/* --- Back to Top --- */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-bg-card);
  color: var(--color-primary);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-base);
  z-index: 999;
}

.back-to-top svg {
  width: 20px;
  height: 20px;
}

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

.back-to-top:hover {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
  transform: translateY(-2px);
}

/* --- Animations --- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

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

/* --- Responsive --- */
@media (max-width: 1024px) {
  .about__grid {
    grid-template-columns: 1fr;
  }

  .services__grid {
    grid-template-columns: 1fr;
  }

  .service-card--featured {
    grid-template-columns: 1fr;
  }

  .service-card--featured .service-card__icon {
    grid-row: auto;
  }

  .service-card__features {
    grid-column: 1;
  }

  .values__grid {
    grid-template-columns: 1fr;
  }

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

  .diary-card--large {
    grid-template-columns: 1fr;
  }

  .diary-card--large .diary-card__title,
  .diary-card--large .diary-card__excerpt,
  .diary-card--large .diary-card__footer {
    grid-column: 1;
  }

  .contact__grid {
    grid-template-columns: 1fr;
  }

  .contact__visual {
    display: none;
  }

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

@media (max-width: 768px) {
  :root {
    --header-height: 64px;
  }

  .nav {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(250, 251, 254, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    z-index: 999;
  }

  .nav.open {
    display: flex;
  }

  .nav__link {
    font-size: 1.2rem;
    padding: 12px 24px;
  }

  .nav-toggle {
    display: flex;
  }

  .hero {
    padding: calc(var(--header-height) + 30px) 0 50px;
    min-height: auto;
  }

  .hero__title {
    font-size: 2rem;
  }

  .hero__desc {
    font-size: 1rem;
  }

  .hero__stats {
    gap: 24px;
    flex-wrap: wrap;
  }

  .hero__scroll {
    display: none;
  }

  .section {
    padding: 64px 0;
  }

  .section__header {
    margin-bottom: 40px;
  }

  .about__card {
    padding: 28px 24px;
  }

  .service-card {
    padding: 28px 24px;
  }

  .service-card__features {
    grid-template-columns: 1fr;
  }

  .diary__grid {
    grid-template-columns: 1fr;
  }

  .diary__intro {
    flex-direction: column;
    padding: 24px;
  }

  .diary-card {
    padding: 22px;
  }

  .diary-card--large {
    padding: 24px;
  }

  .diary-card--large .diary-card__title {
    font-size: 1.15rem;
  }

  .diary__more {
    padding: 28px 20px;
  }

  .diary__wechat-hint {
    flex-direction: column;
    gap: 8px;
    padding: 16px 20px;
    border-radius: var(--radius-md);
    text-align: center;
  }

  .value-card {
    flex-direction: column;
    gap: 12px;
    padding: 28px 24px;
  }

  .value-card__number {
    font-size: 2rem;
  }

  .numbers {
    padding: 48px 0;
  }

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

  .number-card__value {
    font-size: 2rem;
  }

  .footer__top {
    flex-direction: column;
    gap: 32px;
  }

  .footer__links {
    gap: 32px;
  }

  .footer__bottom {
    flex-direction: column;
    text-align: center;
  }

  .btn {
    padding: 12px 24px;
    font-size: 0.9rem;
  }
}

@media (max-width: 480px) {
  .hero__actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero__stats {
    gap: 16px;
  }

  .footer__links {
    flex-direction: column;
    gap: 24px;
  }
}