/* =====================================================================
   wuyingkai 主题样式表
   吴应凯院长个人IP主题 · 鼻整形与全脸轮廓定制
   版本: 20260913a
   ===================================================================== */

/* ---------- CSS 变量 ---------- */
:root {
    --brand: #9C2780;
    --brand-dark: #7A1F65;
    --brand-light: #C44FA0;
    --gold: #C9A96E;
    --gold-light: #E0C790;
    --gold-dark: #A88548;
    --bg: #F0F2F5;
    --bg-alt: #E8EAF0;
    --ink: #1A1A1A;
    --text: #2A2A2A;
    --text-light: #666666;
    --text-muted: #999999;
    --card: #FFFFFF;
    --dark: #2A2A2A;
    --dark-deep: #181818;
    --line: #E0E0E8;
    --shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 16px 50px rgba(156, 39, 128, 0.15);
    --radius: 12px;
    --radius-sm: 8px;
    --serif: 'Noto Serif SC', 'Songti SC', 'STSong', serif;
    --sans: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    --nav-h: 72px;
}

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

html { font-size: 16px; scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

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

a { color: var(--brand); text-decoration: none; transition: color 0.3s; }
a:hover { color: var(--brand-dark); }

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

h1, h2, h3, h4, h5, h6 { font-family: var(--serif); font-weight: 700; line-height: 1.3; color: var(--ink); }

/* ---------- 通用容器 ---------- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ---------- 段落头部 ---------- */
.section-head { text-align: center; margin-bottom: 56px; }
.section-eyebrow {
    display: inline-block;
    font-family: var(--sans);
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    color: var(--gold-dark);
    text-transform: uppercase;
    margin-bottom: 12px;
}
.section-eyebrow--light { color: var(--gold-light); }
.section-title {
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--ink);
    margin-bottom: 16px;
}
.section-title--light { color: #fff; }
.section-accent {
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--gold), var(--gold-light));
    border-radius: 2px;
    margin: 0 auto 20px;
}
.section-sub {
    font-size: 1.05rem;
    color: var(--text-light);
    max-width: 640px;
    margin: 0 auto;
}

/* ---------- 按钮 ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 36px;
    font-family: var(--sans);
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
}
.btn--primary {
    background: linear-gradient(135deg, var(--brand), var(--brand-light));
    color: #fff;
    box-shadow: 0 8px 24px rgba(156, 39, 128, 0.3);
}
.btn--primary:hover {
    background: linear-gradient(135deg, var(--brand-dark), var(--brand));
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(156, 39, 128, 0.4);
}
.btn--secondary {
    background: transparent;
    color: var(--gold-dark);
    border: 2px solid var(--gold);
}
.btn--secondary:hover {
    background: var(--gold);
    color: #fff;
    transform: translateY(-2px);
}
.btn--ghost {
    background: transparent;
    color: var(--brand);
    border: 2px solid var(--brand);
}
.btn--ghost:hover {
    background: var(--brand);
    color: #fff;
}

/* ---------- 导航栏 ---------- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-h);
    z-index: 1000;
    background: var(--brand);
    backdrop-filter: blur(12px);
    transition: all 0.4s ease;
}
.nav--scrolled {
    height: 64px;
    background: rgba(156, 39, 128, 0.98);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}
.nav__inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}
.nav__brand {
    display: flex;
    flex-direction: column;
    text-decoration: none;
    line-height: 1.2;
}
.nav__brand-cn {
    font-family: var(--serif);
    font-size: 1.3rem;
    font-weight: 700;
    color: #fff;
    letter-spacing: 0.05em;
}
.nav__brand-en {
    font-size: 0.7rem;
    color: var(--gold);
    letter-spacing: 0.15em;
    text-transform: uppercase;
}
.nav__links {
    display: flex;
    align-items: center;
    gap: 8px;
}
.nav__links ul {
    display: flex;
    list-style: none;
    gap: 8px;
    margin: 0;
    padding: 0;
}
.nav__links li { margin: 0; }
.nav__links a {
    position: relative;
    display: inline-block;
    padding: 8px 16px;
    color: rgba(255, 255, 255, 0.85);
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.3s;
}
.nav__links a::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 50%;
    right: 50%;
    height: 2px;
    background: var(--gold);
    border-radius: 1px;
    transition: all 0.3s ease;
}
.nav__links a:hover {
    color: #fff;
    text-shadow: 0 0 12px rgba(201, 169, 110, 0.6);
}
.nav__links a:hover::after {
    left: 16px;
    right: 16px;
}
.nav__cta {
    padding: 10px 28px;
    background: linear-gradient(135deg, var(--gold-dark), var(--gold));
    color: #fff !important;
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: 50px;
    border: 1px solid var(--gold-light);
    transition: all 0.3s;
    white-space: nowrap;
}
.nav__cta:hover {
    background: linear-gradient(135deg, var(--gold), var(--gold-light));
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(201, 169, 110, 0.4);
}
.nav__toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
    z-index: 2100;
    position: relative;
}
.nav__toggle span {
    width: 26px;
    height: 2px;
    background: #fff;
    border-radius: 2px;
    transition: all 0.3s;
}

/* ---------- 移动端全屏菜单 ---------- */
.nav__mobile {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: linear-gradient(160deg, var(--dark-deep), var(--dark));
    z-index: 2000;
    transform: translateX(100%);
    visibility: hidden;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1), visibility 0.4s;
    display: none;
    flex-direction: column;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}
.nav__mobile--open { transform: translateX(0); visibility: visible; }
.nav__mobile-inner {
    width: 100%;
    height: 100%;
    max-width: 480px;
    margin: 0 auto;
    padding: 80px 32px 40px;
    display: flex;
    flex-direction: column;
}
.nav__mobile-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 40px;
    padding-bottom: 24px;
    border-bottom: 1px solid rgba(201, 169, 110, 0.2);
}
.nav__mobile-brand {
    font-family: var(--serif);
    font-size: 1.3rem;
    color: #fff;
}
.nav__mobile-close {
    background: none;
    border: none;
    color: #fff;
    font-size: 2rem;
    line-height: 1;
    cursor: pointer;
    padding: 0 8px;
}
.nav__mobile-links {
    flex: 1;
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.nav__mobile-links ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.nav__mobile-links a {
    display: block;
    padding: 16px 0;
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.15rem;
    font-family: var(--serif);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    transition: all 0.3s;
}
.nav__mobile-links a:hover {
    color: var(--gold);
    padding-left: 12px;
}
.nav__mobile-cta {
    display: inline-block;
    margin-top: 24px;
    padding: 14px 32px;
    background: linear-gradient(135deg, var(--brand), var(--brand-light));
    color: #fff !important;
    border-radius: 50px;
    text-align: center;
    font-weight: 600;
}
.nav__mobile-info {
    margin-top: auto;
    padding-top: 32px;
    border-top: 1px solid rgba(201, 169, 110, 0.2);
}
.nav__mobile-info p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
    margin-bottom: 8px;
}

/* ---------- 主内容容器 ---------- */
.site-main { min-height: 50vh; }

/* =====================================================================
   HERO 英雄区
   ===================================================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: calc(var(--nav-h) + 40px) 0 60px;
    background:
        radial-gradient(ellipse at 70% 30%, rgba(156, 39, 128, 0.08), transparent 60%),
        radial-gradient(ellipse at 20% 80%, rgba(201, 169, 110, 0.06), transparent 50%),
        linear-gradient(180deg, var(--bg) 0%, var(--bg-alt) 100%);
    overflow: hidden;
}
.hero__bg-deco {
    position: absolute;
    top: 10%;
    right: -5%;
    font-family: var(--serif);
    font-size: 22rem;
    font-weight: 900;
    color: rgba(156, 39, 128, 0.04);
    line-height: 1;
    pointer-events: none;
    user-select: none;
}
.hero__inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    width: 100%;
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 2;
}
.hero__text { max-width: 600px; }
.hero__eyebrow {
    display: inline-block;
    padding: 6px 18px;
    background: rgba(156, 39, 128, 0.1);
    color: var(--brand);
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    border-radius: 50px;
    margin-bottom: 24px;
}
.hero__title {
    font-family: var(--serif);
    font-size: 4rem;
    font-weight: 900;
    line-height: 1.15;
    color: var(--ink);
    margin-bottom: 24px;
}
.hero__title span { display: block; }
.hero__title-accent {
    background: linear-gradient(135deg, var(--brand), var(--gold));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero__subtitle {
    font-size: 1.1rem;
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 36px;
    max-width: 500px;
}
.hero__actions {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
}
.hero__stats {
    display: flex;
    gap: 48px;
    padding-top: 32px;
    border-top: 1px solid var(--line);
}
.hero__stat { display: flex; flex-direction: column; align-items: flex-start; }
.hero__stat-num {
    font-family: var(--serif);
    font-size: 3rem;
    font-weight: 900;
    color: var(--brand);
    line-height: 1;
}
.hero__stat-suffix {
    font-family: var(--serif);
    font-size: 2rem;
    font-weight: 700;
    color: var(--brand);
    margin-left: -8px;
    display: inline;
}
.hero__stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 8px;
}
.hero__visual {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}
.hero__portrait-wrap {
    position: relative;
    width: 100%;
    max-width: 380px;
    aspect-ratio: 3 / 4;
}
.hero__portrait-wrap::before {
    content: '';
    position: absolute;
    top: 20px;
    left: 20px;
    right: -20px;
    bottom: -20px;
    border: 3px solid var(--gold);
    border-radius: var(--radius);
    z-index: 0;
}
.hero__portrait {
    position: relative;
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--radius);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
    z-index: 1;
    background: linear-gradient(135deg, var(--bg-alt), #fff);
}
.hero__portrait--placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--serif);
    font-size: 3rem;
    color: var(--text-muted);
}
.hero__badge {
    position: absolute;
    bottom: -20px;
    right: -10px;
    background: var(--card);
    padding: 16px 24px;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow);
    border-left: 3px solid var(--gold);
    z-index: 2;
}
.hero__badge-title {
    display: block;
    font-size: 0.8rem;
    color: var(--gold-dark);
    letter-spacing: 0.1em;
}
.hero__badge-name {
    display: block;
    font-family: var(--serif);
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--ink);
}
.hero__scroll {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    font-size: 0.75rem;
    color: var(--text-muted);
    letter-spacing: 0.1em;
}
.hero__scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(180deg, var(--gold), transparent);
    animation: scrollPulse 2s ease-in-out infinite;
}
@keyframes scrollPulse {
    0%, 100% { opacity: 0.3; transform: scaleY(1); }
    50% { opacity: 1; transform: scaleY(1.2); }
}

/* =====================================================================
   理念 Philosophy
   ===================================================================== */
.philosophy {
    position: relative;
    padding: 0;
    overflow: hidden;
}
.philosophy__skew {
    background: linear-gradient(135deg, #fff 0%, var(--bg) 100%);
    transform: skewY(-2deg);
    padding: 100px 0;
    position: relative;
    border-top: 3px solid var(--gold);
    border-bottom: 3px solid var(--gold);
}
.philosophy__bg-deco {
    position: absolute;
    bottom: -5%;
    left: -3%;
    font-family: var(--serif);
    font-size: 16rem;
    font-weight: 900;
    color: rgba(201, 169, 110, 0.05);
    line-height: 1;
    pointer-events: none;
    user-select: none;
    transform: skewY(2deg);
}
.philosophy__container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    transform: skewY(2deg);
    position: relative;
    z-index: 2;
}
.philosophy__header { text-align: center; margin-bottom: 40px; }
.philosophy__body {
    font-size: 1.1rem;
    color: var(--text-light);
    line-height: 1.9;
    text-align: center;
    max-width: 760px;
    margin: 0 auto 56px;
}
.philosophy__cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.phil-card {
    background: var(--card);
    padding: 36px 28px;
    border-radius: var(--radius);
    border-left: 4px solid var(--gold);
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}
.phil-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
    border-left-color: var(--brand);
}
.phil-card__num {
    display: block;
    font-family: var(--serif);
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--gold);
    opacity: 0.4;
    line-height: 1;
    margin-bottom: 16px;
}
.phil-card__title {
    font-size: 1.4rem;
    margin-bottom: 12px;
    color: var(--ink);
}
.phil-card__desc {
    font-size: 0.95rem;
    color: var(--text-light);
    line-height: 1.7;
}

/* =====================================================================
   服务项目 Services
   ===================================================================== */
.services {
    padding: 100px 0;
    position: relative;
    overflow: hidden;
}
.services__bg-deco {
    position: absolute;
    top: 5%;
    right: -3%;
    font-family: var(--serif);
    font-size: 18rem;
    font-weight: 900;
    color: rgba(156, 39, 128, 0.03);
    line-height: 1;
    pointer-events: none;
    user-select: none;
}
.services__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.service-card {
    background: var(--card);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    border-left: 4px solid var(--gold);
    transition: all 0.3s ease;
    cursor: pointer;
}
.service-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
    border-left-color: var(--brand);
}
.service-card__inner { padding: 32px 28px; }
.service-card__num {
    display: block;
    font-family: var(--serif);
    font-size: 2rem;
    font-weight: 900;
    color: var(--gold);
    opacity: 0.5;
    margin-bottom: 12px;
}
.service-card__title {
    font-size: 1.3rem;
    margin-bottom: 12px;
}
.service-card__desc {
    font-size: 0.9rem;
    color: var(--text-light);
    line-height: 1.7;
}

/* =====================================================================
   案例 Cases
   ===================================================================== */
.cases {
    padding: 100px 0;
    background: linear-gradient(180deg, var(--bg) 0%, var(--bg-alt) 100%);
}
.cases__featured {
    margin-bottom: 40px;
}
.case-featured {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 0;
    background: var(--card);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    text-decoration: none;
    transition: all 0.3s;
}
.case-featured:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-4px);
}
.case-featured__img {
    overflow: hidden;
    aspect-ratio: 4 / 3;
}
.case-featured__img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s;
}
.case-featured:hover .case-featured__img img {
    transform: scale(1.05);
}
.case-featured__info {
    padding: 40px 36px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    border-left: 4px solid var(--gold);
}
.case-featured__tag {
    display: inline-block;
    padding: 4px 14px;
    background: var(--brand);
    color: #fff;
    font-size: 0.75rem;
    border-radius: 50px;
    margin-bottom: 16px;
    align-self: flex-start;
}
.case-featured__title {
    font-size: 1.8rem;
    margin-bottom: 16px;
}
.case-featured__intro {
    font-size: 0.95rem;
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 24px;
}
.case-featured__more {
    color: var(--brand);
    font-weight: 600;
    font-size: 0.9rem;
    transition: all 0.3s;
}
.case-featured:hover .case-featured__more {
    transform: translateX(6px);
}
.cases__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.case-card {
    display: block;
    background: var(--card);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    border-left: 3px solid var(--gold);
    transition: all 0.3s;
    text-decoration: none;
}
.case-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
    border-left-color: var(--brand);
}
.case-card__img {
    aspect-ratio: 4 / 3;
    overflow: hidden;
}
.case-card__img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s;
}
.case-card:hover .case-card__img img {
    transform: scale(1.08);
}
.case-card__body { padding: 16px 18px; }
.case-card__date {
    font-size: 0.75rem;
    color: var(--gold-dark);
    letter-spacing: 0.05em;
}
.case-card__title {
    font-size: 1.05rem;
    margin-top: 6px;
    margin-bottom: 8px;
    color: var(--ink);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.case-card__excerpt {
    font-size: 0.85rem;
    color: var(--text-light);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.cases__empty {
    text-align: center;
    padding: 60px 0;
    color: var(--text-muted);
}

/* =====================================================================
   科普 Science
   ===================================================================== */
.science {
    padding: 100px 0;
    position: relative;
    overflow: hidden;
}
.science__bg-deco {
    position: absolute;
    bottom: 5%;
    left: -5%;
    font-family: var(--serif);
    font-size: 20rem;
    font-weight: 900;
    color: rgba(201, 169, 110, 0.04);
    line-height: 1;
    pointer-events: none;
    user-select: none;
}
.science__layout {
    display: grid;
    grid-template-columns: 0.8fr 1.2fr;
    gap: 60px;
    align-items: start;
}
.science__head { position: sticky; top: 100px; }
.science__head .section-title { text-align: left; }
.science__head .section-accent { margin-left: 0; }
.science__head .section-sub { text-align: left; margin-left: 0; }
.science__list {
    display: flex;
    flex-direction: column;
    gap: 0;
}
.science-item {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 24px;
    padding: 28px 0;
    border-bottom: 1px solid var(--line);
    text-decoration: none;
    transition: all 0.3s;
    align-items: start;
}
.science-item:hover {
    padding-left: 12px;
    background: rgba(156, 39, 128, 0.02);
}
.science-item__num {
    font-family: var(--serif);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gold);
    line-height: 1;
}
.science-item__body { flex: 1; }
.science-item__title {
    font-size: 1.25rem;
    margin-bottom: 8px;
    transition: color 0.3s;
}
.science-item:hover .science-item__title { color: var(--brand); }
.science-item__excerpt {
    font-size: 0.9rem;
    color: var(--text-light);
    line-height: 1.6;
    margin-bottom: 8px;
}
.science-item__date {
    font-size: 0.8rem;
    color: var(--text-muted);
}
.science__empty { color: var(--text-muted); }

/* =====================================================================
   预约面诊 Contact
   ===================================================================== */
.contact {
    padding: 100px 0;
    background: linear-gradient(160deg, var(--dark-deep), var(--dark));
    position: relative;
    overflow: hidden;
}
.contact__bg-deco {
    position: absolute;
    top: 10%;
    right: -5%;
    font-family: var(--serif);
    font-size: 22rem;
    font-weight: 900;
    color: rgba(201, 169, 110, 0.05);
    line-height: 1;
    pointer-events: none;
    user-select: none;
}
.contact__inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 2;
}
.contact__desc {
    color: rgba(255, 255, 255, 0.7);
    font-size: 1.05rem;
    line-height: 1.8;
    margin-top: 20px;
}
.contact__channels {
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.contact-channel {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 24px 28px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius);
    border: 1px solid rgba(201, 169, 110, 0.15);
    transition: all 0.3s;
    text-decoration: none;
}
.contact-channel:hover {
    background: rgba(201, 169, 110, 0.08);
    border-color: var(--gold);
    transform: translateX(6px);
}
.contact-channel__icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--gold-dark), var(--gold));
    color: #fff;
    font-size: 1.3rem;
    border-radius: 50%;
    flex-shrink: 0;
}
.contact-channel__body { display: flex; flex-direction: column; }
.contact-channel__label {
    font-size: 0.8rem;
    color: var(--gold);
    letter-spacing: 0.1em;
}
.contact-channel__value {
    font-size: 1.1rem;
    color: #fff;
    font-weight: 500;
    margin-top: 4px;
}

/* =====================================================================
   页脚 Footer
   ===================================================================== */
.footer {
    background: var(--dark-deep);
    color: rgba(255, 255, 255, 0.6);
    padding: 60px 0 0;
}
.footer__inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 48px;
}
.footer__logo {
    display: flex;
    align-items: baseline;
    gap: 12px;
    margin-bottom: 16px;
}
.footer__logo-cn {
    font-family: var(--serif);
    font-size: 1.8rem;
    font-weight: 700;
    color: #fff;
}
.footer__logo-title {
    color: var(--gold);
    font-size: 1rem;
}
.footer__tagline {
    color: var(--gold-light);
    font-size: 0.9rem;
    margin-bottom: 8px;
}
.footer__philosophy {
    font-size: 0.85rem;
    line-height: 1.7;
    max-width: 380px;
}
.footer__heading {
    color: #fff;
    font-size: 1.1rem;
    margin-bottom: 20px;
}
.footer__contact-list,
.footer__nav-list {
    list-style: none;
    padding: 0;
}
.footer__contact-list li {
    margin-bottom: 12px;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.7);
}
.footer__contact-list li span {
    color: var(--gold);
    margin-right: 8px;
}
.footer__nav-list li { margin-bottom: 10px; }
.footer__nav-list a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
    transition: color 0.3s;
}
.footer__nav-list a:hover { color: var(--gold); }
.footer__bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    max-width: 1200px;
    margin: 0 auto;
}
.footer__legal p,
.footer__copy p {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.4);
    margin-bottom: 4px;
}
.footer__powered a {
    color: rgba(255, 255, 255, 0.4);
    text-decoration: underline;
}
.footer__powered a:hover { color: var(--gold); }

/* =====================================================================
   返回顶部
   ===================================================================== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--brand), var(--brand-light));
    color: #fff;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 24px rgba(156, 39, 128, 0.3);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.3s;
    z-index: 900;
}
.back-to-top--show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(156, 39, 128, 0.4);
}

/* =====================================================================
   文章详情 Single
   ===================================================================== */
.single { padding-top: var(--nav-h); }
.single__cover {
    width: 100%;
    max-height: 480px;
    overflow: hidden;
    position: relative;
}
.single__cover img {
    width: 100%;
    height: 480px;
    object-fit: cover;
}
.single__cover-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 60%, rgba(26, 26, 26, 0.5));
}
.single__container {
    max-width: 860px;
    padding-top: 40px;
    padding-bottom: 80px;
}
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 32px;
}
.breadcrumb--light { color: rgba(255, 255, 255, 0.8); }
.breadcrumb a { color: var(--text-light); }
.breadcrumb--light a { color: rgba(255, 255, 255, 0.8); }
.breadcrumb__sep { color: var(--text-muted); }
.breadcrumb__current { color: var(--brand); }
.single__header { margin-bottom: 40px; }
.single__title {
    font-size: 2.5rem;
    margin-bottom: 20px;
    line-height: 1.3;
}
.single__meta {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
    font-size: 0.85rem;
    color: var(--text-muted);
    padding-bottom: 24px;
    border-bottom: 1px solid var(--line);
}
.single__cat {
    padding: 2px 12px;
    background: rgba(156, 39, 128, 0.1);
    color: var(--brand);
    border-radius: 50px;
}
.single__content {
    font-size: 1.05rem;
    line-height: 1.9;
    color: var(--text);
}
.single__content p { margin-bottom: 1.5em; }
.single__content h2 { font-size: 1.8rem; margin: 1.5em 0 0.8em; }
.single__content h3 { font-size: 1.4rem; margin: 1.2em 0 0.6em; }
.single__content img {
    border-radius: var(--radius-sm);
    margin: 1.5em auto;
    box-shadow: var(--shadow);
}
.single__content blockquote {
    margin: 1.5em 0;
    padding: 16px 24px;
    border-left: 4px solid var(--gold);
    background: rgba(201, 169, 110, 0.05);
    color: var(--text-light);
}
.single__tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin: 40px 0;
    padding-top: 24px;
    border-top: 1px solid var(--line);
}
.tag {
    padding: 6px 16px;
    background: var(--bg-alt);
    color: var(--text-light);
    font-size: 0.85rem;
    border-radius: 50px;
}
.single__nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin: 40px 0;
}
.single__nav-item {
    display: block;
    padding: 24px;
    background: var(--card);
    border-radius: var(--radius);
    border-left: 3px solid var(--gold);
    text-decoration: none;
    transition: all 0.3s;
}
.single__nav-item:hover {
    border-left-color: var(--brand);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}
.single__nav-item--next { text-align: right; border-left: none; border-right: 3px solid var(--gold); }
.single__nav-item--next:hover { border-right-color: var(--brand); }
.single__nav-label {
    display: block;
    font-size: 0.8rem;
    color: var(--gold-dark);
    margin-bottom: 8px;
}
.single__nav-title {
    font-size: 1rem;
    color: var(--ink);
    font-family: var(--sans);
    font-weight: 500;
}
.single__cta {
    background: linear-gradient(160deg, var(--dark-deep), var(--dark));
    border-radius: var(--radius);
    overflow: hidden;
}
.single__cta-inner {
    padding: 48px 40px;
    text-align: center;
}
.single__cta-inner h3 {
    color: #fff;
    font-size: 1.5rem;
    margin-bottom: 24px;
}

/* =====================================================================
   独立页面 Page
   ===================================================================== */
.page { padding-top: var(--nav-h); }
.page__container {
    max-width: 860px;
    padding-top: 40px;
    padding-bottom: 80px;
}
.page__header { margin-bottom: 40px; }
.page__title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 16px;
}
.page__content {
    font-size: 1.05rem;
    line-height: 1.9;
    color: var(--text);
}
.page__content p { margin-bottom: 1.5em; }
.page__content h2 { font-size: 1.8rem; margin: 1.5em 0 0.8em; }
.page__content img { border-radius: var(--radius-sm); margin: 1.5em auto; }

/* =====================================================================
   分类页 Category
   ===================================================================== */
.category-page { padding-top: var(--nav-h); }
.category__hero {
    background: linear-gradient(160deg, var(--dark-deep), var(--dark));
    padding: 60px 0;
    position: relative;
    overflow: hidden;
}
.category__bg-deco {
    position: absolute;
    top: 20%;
    right: -3%;
    font-family: var(--serif);
    font-size: 14rem;
    font-weight: 900;
    color: rgba(201, 169, 110, 0.05);
    line-height: 1;
    pointer-events: none;
    user-select: none;
}
.category__title {
    color: #fff;
    font-size: 2.5rem;
    margin: 16px 0;
}
.category__desc {
    color: rgba(255, 255, 255, 0.7);
    font-size: 1.05rem;
}
.category__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    padding: 60px 0;
}
.category__empty {
    grid-column: 1 / -1;
    text-align: center;
    padding: 80px 0;
    color: var(--text-muted);
}
.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    padding: 40px 0;
    flex-wrap: wrap;
}
.pagination__item {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 12px;
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-size: 0.9rem;
    transition: all 0.3s;
}
.pagination__item:hover {
    background: var(--brand);
    color: #fff;
    border-color: var(--brand);
}
.pagination__item--active {
    background: var(--brand);
    color: #fff;
    border-color: var(--brand);
}

/* =====================================================================
   404 页面
   ===================================================================== */
.error-404 {
    min-height: 70vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: calc(var(--nav-h) + 40px) 0 60px;
    background: linear-gradient(180deg, var(--bg), var(--bg-alt));
    position: relative;
    overflow: hidden;
}
.error-404__bg-deco {
    position: absolute;
    top: 15%;
    left: 50%;
    transform: translateX(-50%);
    font-family: var(--serif);
    font-size: 28rem;
    font-weight: 900;
    color: rgba(156, 39, 128, 0.04);
    line-height: 1;
    pointer-events: none;
    user-select: none;
}
.error-404__inner {
    text-align: center;
    position: relative;
    z-index: 2;
}
.error-404__code {
    font-family: var(--serif);
    font-size: 6rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--brand), var(--gold));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.error-404__title {
    font-size: 2rem;
    margin: 16px 0 24px;
}
.error-404__desc {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 32px;
}
.error-404__actions {
    display: flex;
    gap: 16px;
    justify-content: center;
}

/* =====================================================================
   滚动揭示动画
   ===================================================================== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal--visible {
    opacity: 1;
    transform: translateY(0);
}

/* =====================================================================
   响应式 - 1024px
   ===================================================================== */
@media (max-width: 1024px) {
    .hero__title { font-size: 3.2rem; }
    .hero__inner { gap: 40px; }
    .hero__portrait-wrap { max-width: 320px; }
    .philosophy__cards { gap: 16px; }
    .phil-card { padding: 28px 20px; }
    .services__grid { grid-template-columns: repeat(2, 1fr); }
    .cases__grid { grid-template-columns: repeat(3, 1fr); }
    .science__layout { gap: 40px; }
    .footer__inner { grid-template-columns: 1fr 1fr; }
    .footer__col--brand { grid-column: 1 / -1; }
}

/* =====================================================================
   响应式 - 768px 平板
   ===================================================================== */
@media (max-width: 768px) {
    .nav__links { display: none; }
    .nav__cta { display: none; }
    .nav__toggle { display: flex; }
    .nav__mobile { display: flex; }

    .hero { min-height: auto; padding: calc(var(--nav-h) + 40px) 0 60px; }
    .hero__inner {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    .hero__text { max-width: 100%; }
    .hero__eyebrow { margin: 0 auto 24px; }
    .hero__actions { justify-content: center; }
    .hero__stats { justify-content: center; }
    .hero__title { font-size: 2.8rem; }
    .hero__subtitle { margin: 0 auto 36px; }
    .hero__visual { order: -1; }
    .hero__portrait-wrap { max-width: 280px; margin: 0 auto; }
    .hero__bg-deco { font-size: 14rem; }

    .philosophy__skew { padding: 60px 0; }
    .philosophy__cards {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    .philosophy__body { font-size: 1rem; }

    .services { padding: 60px 0; }
    .services__grid { grid-template-columns: 1fr; }
    .services__bg-deco { font-size: 12rem; }

    .cases { padding: 60px 0; }
    .case-featured {
        grid-template-columns: 1fr;
    }
    .case-featured__info { padding: 28px 24px; border-left: none; border-top: 4px solid var(--gold); }
    .cases__grid { grid-template-columns: repeat(2, 1fr); }

    .science { padding: 60px 0; }
    .science__layout {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    .science__head { position: static; }
    .science__head .section-title,
    .science__head .section-sub { text-align: center; }
    .science__head .section-accent { margin: 0 auto; }

    .contact { padding: 60px 0; }
    .contact__inner {
        grid-template-columns: 1fr;
        gap: 32px;
        text-align: center;
    }
    .contact__desc { margin: 20px auto 0; max-width: 480px; }

    .footer__inner {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    .footer__col { text-align: center; }
    .footer__bottom { flex-direction: column; text-align: center; }

    .single__title { font-size: 2rem; }
    .single__nav { grid-template-columns: 1fr; }
    .single__nav-item--next {
        text-align: left;
        border-right: none;
        border-left: 3px solid var(--gold);
    }

    .category__grid { grid-template-columns: repeat(2, 1fr); }
    .error-404__code { font-size: 4rem; }
    .error-404__title { font-size: 1.5rem; }

    .back-to-top { width: 42px; height: 42px; bottom: 20px; right: 20px; }
}

/* =====================================================================
   响应式 - 480px 手机
   ===================================================================== */
@media (max-width: 480px) {
    .container { padding: 0 16px; }
    .section-title { font-size: 1.8rem; }
    .section-head { margin-bottom: 36px; }

    .hero__title { font-size: 2.2rem; }
    .hero__eyebrow { font-size: 0.78rem; }
    .hero__subtitle { font-size: 1rem; }
    .hero__stats { gap: 24px; }
    .hero__stat-num { font-size: 2.2rem; }
    .hero__actions { flex-direction: column; gap: 12px; }
    .hero__actions .btn { width: 100%; }
    .hero__bg-deco { font-size: 9rem; }

    .phil-card { padding: 24px 20px; }

    .cases__grid { grid-template-columns: 1fr; }
    .category__grid { grid-template-columns: 1fr; }

    .contact-channel {
        padding: 18px 20px;
        gap: 14px;
    }
    .contact-channel__icon { width: 40px; height: 40px; font-size: 1.1rem; }
    .contact-channel__value { font-size: 1rem; }

    .single__title { font-size: 1.6rem; }
    .page__title { font-size: 1.6rem; }

    .pagination__item { min-width: 36px; height: 36px; }

    .error-404__code { font-size: 3rem; }
    .error-404__title { font-size: 1.3rem; }
    .error-404__desc { font-size: 0.9rem; }
    .error-404__actions { flex-direction: column; gap: 12px; }

    .footer__bottom { padding: 20px 16px; }
}