/* ========================================
   路利特®卢立康唑乳膏 - 网站样式 V5
   海南海灵化学制药有限公司
======================================== */

/* ========== CSS 变量 ========== */
:root {
    /* 主色调 - 医药蓝绿 */
    --color-primary: #0e8a6e;
    --color-primary-dark: #0a6b55;
    --color-primary-light: #1aa988;
    --color-primary-bg: #e8f7f3;

    /* 辅助色 */
    --color-secondary: #1565c0;
    --color-secondary-light: #e3f2fd;
    --color-accent: #ff7043;
    --color-accent-light: #fff3e0;

    /* 中性色 */
    --color-text: #1a2332;
    --color-text-light: #5a6c7d;
    --color-text-muted: #8e9aab;
    --color-border: #e0e6ed;
    --color-bg: #ffffff;
    --color-bg-alt: #f5f9fa;
    --color-bg-dark: #0d1b2a;

    /* 阴影 */
    --shadow-sm: 0 2px 8px rgba(14, 138, 110, 0.06);
    --shadow-md: 0 4px 20px rgba(14, 138, 110, 0.1);
    --shadow-lg: 0 10px 40px rgba(14, 138, 110, 0.12);
    --shadow-xl: 0 20px 60px rgba(14, 138, 110, 0.15);

    /* 圆角 */
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 24px;
    --radius-xl: 32px;

    /* 过渡 */
    --transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.2s ease;
    --transition-bounce: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);

    /* 容器 */
    --container-max: 1200px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
                 "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue",
                 Helvetica, Arial, sans-serif;
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.7;
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

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

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

/* ========== 按钮 ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 32px;
    font-size: 16px;
    font-weight: 600;
    border-radius: var(--radius-sm);
    border: 2px solid transparent;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.btn--primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    color: #fff;
    box-shadow: 0 4px 16px rgba(14, 138, 110, 0.3);
}

.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(14, 138, 110, 0.4);
}

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

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

.btn--block {
    width: 100%;
}

/* ========== 头部导航 ========== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.nav__logo {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--color-primary);
    flex-shrink: 0;
}

.nav__logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
}

.nav__logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.nav__logo-text strong {
    font-size: 18px;
    color: var(--color-text);
}

.nav__logo-text small {
    font-size: 11px;
    color: var(--color-text-light);
    letter-spacing: 0.5px;
}

.nav__menu {
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav__link {
    padding: 8px 16px;
    font-size: 15px;
    font-weight: 500;
    color: var(--color-text-light);
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
    position: relative;
}

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

.nav__link.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 3px;
    background: var(--color-primary);
    border-radius: 2px;
}

.nav__toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav__toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: var(--transition);
}

.nav__toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

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

.nav__toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ========== Hero 区域 ========== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 72px;
    overflow: hidden;
    background: linear-gradient(160deg, #f0faf7 0%, #ffffff 50%, #eef7fd 100%);
}

.hero__bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
    z-index: 0;
}

.hero__bg-circle {
    position: absolute;
    border-radius: 50%;
    filter: blur(60px);
    opacity: 0.4;
}

.hero__bg-circle--1 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, var(--color-primary-light), transparent);
    top: -150px;
    right: -100px;
    animation: float 8s ease-in-out infinite;
}

.hero__bg-circle--2 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, var(--color-secondary), transparent);
    bottom: -100px;
    left: -80px;
    opacity: 0.2;
    animation: float 10s ease-in-out infinite reverse;
}

.hero__bg-circle--3 {
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, #4dd0e1, transparent);
    top: 40%;
    left: 50%;
    opacity: 0.15;
    animation: float 12s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0) scale(1); }
    50% { transform: translateY(-30px) scale(1.05); }
}

.hero__content {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    padding: 60px 24px;
}

.hero__badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: var(--color-primary-bg);
    border: 1px solid rgba(14, 138, 110, 0.2);
    border-radius: 100px;
    font-size: 13px;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 24px;
}

.hero__badge-dot {
    width: 8px;
    height: 8px;
    background: var(--color-primary);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.3); }
}

.hero__title {
    font-size: clamp(2.5rem, 5vw, 3.8rem);
    font-weight: 800;
    line-height: 1.15;
    color: var(--color-text);
    margin-bottom: 12px;
    letter-spacing: -1px;
}

.hero__title sup {
    font-size: 0.4em;
    vertical-align: super;
}

.hero__subtitle {
    font-size: clamp(1.2rem, 2.5vw, 1.6rem);
    color: var(--color-primary);
    font-weight: 600;
    margin-bottom: 20px;
}

.hero__desc {
    font-size: 17px;
    color: var(--color-text-light);
    line-height: 1.8;
    margin-bottom: 32px;
}

.highlight {
    color: var(--color-primary);
    font-weight: 700;
    font-size: 1.1em;
}

.hero__features {
    display: flex;
    align-items: center;
    gap: 0;
    margin-bottom: 36px;
    padding: 24px 0;
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.hero__feature {
    flex: 1;
    text-align: center;
}

.hero__feature-num {
    font-size: 2rem;
    font-weight: 800;
    color: var(--color-primary);
    line-height: 1;
}

.hero__feature-label {
    font-size: 13px;
    color: var(--color-text-light);
    margin-top: 6px;
}

.hero__feature-divider {
    width: 1px;
    height: 40px;
    background: var(--color-border);
}

.hero__actions {
    display: flex;
    gap: 16px;
}

/* Hero 产品图 */
.hero__visual {
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.hero__product {
    position: relative;
    width: 320px;
    height: 420px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero__product-glow {
    position: absolute;
    width: 280px;
    height: 280px;
    background: radial-gradient(circle, rgba(14, 138, 110, 0.2), transparent 70%);
    border-radius: 50%;
    animation: glow 4s ease-in-out infinite;
}

@keyframes glow {
    0%, 100% { transform: scale(1); opacity: 0.6; }
    50% { transform: scale(1.15); opacity: 0.9; }
}

.hero__product-tube {
    position: relative;
    width: 160px;
    height: 300px;
    z-index: 1;
    animation: floatProduct 5s ease-in-out infinite;
}

@keyframes floatProduct {
    0%, 100% { transform: translateY(0) rotate(-2deg); }
    50% { transform: translateY(-15px) rotate(2deg); }
}

.hero__product-tube-cap {
    width: 70px;
    height: 40px;
    background: linear-gradient(135deg, #0a6b55, #0e8a6e);
    border-radius: 8px 8px 4px 4px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
    box-shadow: 0 4px 12px rgba(10, 107, 85, 0.3);
}

.hero__product-tube-body {
    width: 160px;
    height: 260px;
    background: linear-gradient(135deg, #ffffff, #f0f4f8);
    border-radius: 16px 16px 80px 80px;
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding-top: 40px;
    border: 2px solid rgba(14, 138, 110, 0.1);
}

.hero__product-tube-label {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    text-align: center;
}

.hero__product-tube-name {
    font-size: 22px;
    font-weight: 800;
    color: var(--color-primary);
}

.hero__product-tube-name sup {
    font-size: 0.5em;
}

.hero__product-tube-sub {
    font-size: 13px;
    color: var(--color-text);
    font-weight: 600;
}

.hero__product-tube-spec {
    font-size: 12px;
    color: var(--color-primary);
    font-weight: 700;
    background: var(--color-primary-bg);
    padding: 2px 10px;
    border-radius: 100px;
    margin-top: 4px;
}

.hero__product-tube-mfr {
    font-size: 9px;
    color: var(--color-text-light);
    margin-top: 8px;
    line-height: 1.3;
    max-width: 120px;
}

.hero__wave {
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    line-height: 0;
}

.hero__wave svg {
    width: 100%;
    height: 80px;
}

/* ========== Hero 滚动提示 ========== */
.hero__scroll-hint {
    position: absolute;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    z-index: 2;
    animation: bounceHint 2s ease-in-out infinite;
}

.hero__scroll-hint span {
    font-size: 12px;
    color: var(--color-text-light);
    letter-spacing: 2px;
}

.hero__scroll-mouse {
    width: 24px;
    height: 38px;
    border: 2px solid var(--color-text-light);
    border-radius: 12px;
    display: flex;
    justify-content: center;
    padding-top: 6px;
}

.hero__scroll-wheel {
    width: 4px;
    height: 8px;
    background: var(--color-text-light);
    border-radius: 2px;
    animation: scrollWheel 1.5s ease-in-out infinite;
}

@keyframes scrollWheel {
    0% { opacity: 1; transform: translateY(0); }
    100% { opacity: 0; transform: translateY(12px); }
}

@keyframes bounceHint {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(-8px); }
}

@media (max-width: 768px) {
    .hero__scroll-hint {
        display: none;
    }
}

[data-theme="dark"] .hero__scroll-mouse {
    border-color: var(--color-text-light);
}

[data-theme="dark"] .hero__scroll-wheel {
    background: var(--color-text-light);
}

/* ========== 通用 Section ========== */
.section {
    padding: 100px 0;
    position: relative;
}

.section--alt {
    background: var(--color-bg-alt);
}

.section__header {
    text-align: center;
    margin-bottom: 60px;
}

.section__tag {
    display: inline-block;
    padding: 4px 16px;
    background: var(--color-primary-bg);
    color: var(--color-primary);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 2px;
    border-radius: 100px;
    margin-bottom: 16px;
}

.section__title {
    font-size: clamp(2rem, 4vw, 2.8rem);
    font-weight: 800;
    color: var(--color-text);
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}

.section__subtitle {
    font-size: 17px;
    color: var(--color-text-light);
}

/* ========== 产品介绍 ========== */
.product-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 48px;
}

.product-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 32px 28px;
    transition: var(--transition);
    position: relative;
}

.product-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}

.product-card--highlight {
    background: linear-gradient(135deg, var(--color-primary-bg), #fff);
    border-color: rgba(14, 138, 110, 0.2);
}

.product-card__icon {
    color: var(--color-primary);
    margin-bottom: 20px;
}

.product-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 12px;
}

.product-card p {
    font-size: 15px;
    color: var(--color-text-light);
    line-height: 1.7;
}

/* 产品信息表 */
.product-info {
    background: var(--color-bg);
    border-radius: var(--radius-md);
    padding: 8px 32px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
}

.product-info__item {
    display: flex;
    align-items: center;
    padding: 16px 0;
    border-bottom: 1px solid var(--color-border);
}

.product-info__item:last-child {
    border-bottom: none;
}

.product-info__label {
    width: 140px;
    font-size: 14px;
    color: var(--color-text-light);
    font-weight: 500;
    flex-shrink: 0;
}

.product-info__value {
    font-size: 15px;
    color: var(--color-text);
    font-weight: 600;
}

/* ========== 作用机制 ========== */
.mechanism {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.mechanism__visual {
    display: flex;
    justify-content: center;
}

.mechanism__diagram {
    display: flex;
    align-items: center;
    gap: 20px;
    background: var(--color-bg);
    padding: 48px 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border);
}

.mechanism__cell {
    width: 140px;
    height: 140px;
    border: 3px solid var(--color-primary);
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    background: var(--color-primary-bg);
}

.mechanism__cell-label {
    font-size: 13px;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 4px;
}

.mechanism__cell-membrane {
    font-size: 11px;
    color: var(--color-text-light);
    margin-bottom: 8px;
}

.mechanism__cell-target {
    position: relative;
    padding: 4px 12px;
    background: #fff;
    border: 2px solid var(--color-accent);
    border-radius: 100px;
    font-size: 11px;
    font-weight: 600;
    color: var(--color-accent);
}

.mechanism__cell-target-pulse {
    position: absolute;
    inset: -4px;
    border: 2px solid var(--color-accent);
    border-radius: 100px;
    opacity: 0.5;
    animation: pulseRing 2s ease-out infinite;
}

@keyframes pulseRing {
    0% { transform: scale(1); opacity: 0.5; }
    100% { transform: scale(1.5); opacity: 0; }
}

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

.mechanism__drug-icon {
    color: var(--color-primary);
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary-bg);
    border-radius: var(--radius-sm);
}

.mechanism__drug span {
    font-size: 13px;
    font-weight: 600;
    color: var(--color-primary);
}

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

.mechanism__step {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.mechanism__step-num {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    color: #fff;
    font-size: 18px;
    font-weight: 800;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(14, 138, 110, 0.3);
}

.mechanism__step-content h4 {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 6px;
}

.mechanism__step-content p {
    font-size: 15px;
    color: var(--color-text-light);
    line-height: 1.7;
}

.mechanism__step-content strong {
    color: var(--color-primary);
}

/* ========== 适应症 ========== */
.indications-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 32px;
}

.indication-card {
    background: var(--color-bg);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 36px 28px;
    text-align: center;
    transition: var(--transition);
    position: relative;
}

.indication-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.indication-card__icon {
    color: var(--color-primary);
    margin-bottom: 20px;
    display: flex;
    justify-content: center;
}

.indication-card h3 {
    font-size: 22px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 12px;
}

.indication-card p {
    font-size: 14px;
    color: var(--color-text-light);
    line-height: 1.7;
    margin-bottom: 16px;
}

.indication-card__tag {
    display: inline-block;
    padding: 4px 16px;
    background: var(--color-primary-bg);
    color: var(--color-primary);
    font-size: 13px;
    font-weight: 600;
    border-radius: 100px;
}

.indications-note {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px 28px;
    background: #fff8e1;
    border: 1px solid #ffe082;
    border-radius: var(--radius-md);
}

.indications-note__icon {
    color: #f9a825;
    flex-shrink: 0;
}

.indications-note p {
    font-size: 14px;
    color: #5d4037;
    font-weight: 500;
}

/* ========== 用法用量 ========== */
.usage__main {
    display: flex;
    align-items: stretch;
    justify-content: center;
    gap: 0;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.usage__card {
    flex: 1;
    min-width: 240px;
    max-width: 300px;
    background: var(--color-bg);
    border-radius: var(--radius-md);
    padding: 36px 28px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    position: relative;
    transition: var(--transition);
}

.usage__card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.usage__card-step {
    width: 48px;
    height: 48px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    color: #fff;
    font-size: 22px;
    font-weight: 800;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(14, 138, 110, 0.3);
}

.usage__card h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 12px;
}

.usage__card p {
    font-size: 14px;
    color: var(--color-text-light);
    line-height: 1.7;
}

.usage__connector {
    display: flex;
    align-items: center;
    padding: 0 8px;
}

.usage__schedule {
    background: var(--color-bg);
    border-radius: var(--radius-md);
    padding: 36px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    margin-bottom: 24px;
}

.usage__schedule-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 24px;
    text-align: center;
}

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

.usage__schedule-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px;
    background: var(--color-bg-alt);
    border-radius: var(--radius-sm);
}

.usage__schedule-icon {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    flex-shrink: 0;
}

.usage__schedule-icon--foot {
    background: linear-gradient(135deg, #26a69a, #4db6ac);
}

.usage__schedule-icon--body {
    background: linear-gradient(135deg, #42a5f5, #64b5f6);
}

.usage__schedule-icon--groin {
    background: linear-gradient(135deg, #ab47bc, #ce93d8);
}

.usage__schedule-info h4 {
    font-size: 16px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 4px;
}

.usage__schedule-info p {
    font-size: 14px;
    color: var(--color-text-light);
}

.usage__schedule-info strong {
    color: var(--color-primary);
}

.usage__tips {
    display: flex;
    gap: 24px;
    background: var(--color-primary-bg);
    border-radius: var(--radius-md);
    padding: 32px;
    border: 1px solid rgba(14, 138, 110, 0.15);
}

.usage__tips-icon {
    color: var(--color-primary);
    flex-shrink: 0;
}

.usage__tips-content h4 {
    font-size: 17px;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 12px;
}

.usage__tips-content ul {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px 24px;
}

.usage__tips-content li {
    font-size: 14px;
    color: var(--color-text);
    padding-left: 20px;
    position: relative;
    line-height: 1.8;
}

.usage__tips-content li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: 700;
}

/* ========== 安全性 ========== */
.safety {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 60px;
    align-items: start;
}

.safety__stat {
    text-align: center;
}

.safety__stat-circle {
    position: relative;
    width: 200px;
    height: 200px;
    margin: 0 auto 16px;
}

.safety__stat-svg {
    width: 100%;
    height: 100%;
}

.safety__stat-progress {
    transition: stroke-dashoffset 2s ease;
}

.safety__stat-text {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.safety__stat-num {
    font-size: 42px;
    font-weight: 800;
    color: var(--color-primary);
    line-height: 1;
}

.safety__stat-unit {
    font-size: 20px;
}

.safety__stat-label {
    font-size: 13px;
    color: var(--color-text-light);
    margin-top: 6px;
}

.safety__stat-desc {
    font-size: 13px;
    color: var(--color-text-muted, #8e9aab);
}

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

.safety__block h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.safety__block-icon {
    width: 28px;
    height: 28px;
    border-radius: var(--radius-sm);
    display: inline-block;
}

.safety__block-icon--adverse {
    background: #ffe0b2;
}

.safety__block-icon--ban {
    background: #ffcdd2;
}

.safety__block-icon--warn {
    background: #fff9c4;
}

.safety__block > p {
    font-size: 15px;
    color: var(--color-text-light);
    margin-bottom: 16px;
}

.safety__bars {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.safety__bar {
    display: flex;
    align-items: center;
    gap: 16px;
}

.safety__bar-label {
    width: 140px;
    font-size: 14px;
    color: var(--color-text);
    font-weight: 500;
    flex-shrink: 0;
}

.safety__bar-track {
    flex: 1;
    height: 10px;
    background: var(--color-bg-alt);
    border-radius: 5px;
    overflow: hidden;
}

.safety__bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
    border-radius: 5px;
    transition: width 1.5s ease;
}

.safety__bar-value {
    width: 50px;
    font-size: 14px;
    color: var(--color-primary);
    font-weight: 700;
    text-align: right;
}

.safety__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
}

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

.safety__list li {
    font-size: 14px;
    color: var(--color-text-light);
    padding-left: 20px;
    position: relative;
    line-height: 1.7;
}

.safety__list li::before {
    content: '•';
    position: absolute;
    left: 4px;
    color: var(--color-primary);
    font-weight: 700;
}

.safety__list strong {
    color: var(--color-text);
}

/* ========== 临床研究 ========== */
.clinical-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.clinical-card {
    background: var(--color-bg);
    border-radius: var(--radius-md);
    padding: 36px 32px;
    border: 1px solid var(--color-border);
    transition: var(--transition);
    position: relative;
}

.clinical-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary);
}

.clinical-card__quote {
    font-size: 60px;
    color: var(--color-primary);
    opacity: 0.15;
    line-height: 0.8;
    margin-bottom: 8px;
    font-family: Georgia, serif;
}

.clinical-card p {
    font-size: 16px;
    color: var(--color-text);
    line-height: 1.8;
    margin-bottom: 20px;
    font-weight: 500;
}

.clinical-card__source {
    padding-top: 16px;
    border-top: 1px solid var(--color-border);
}

.clinical-card__source span {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-primary);
}

.clinical-card__source small {
    font-size: 12px;
    color: var(--color-text-muted, #8e9aab);
}

/* ========== 关于海灵 ========== */
.about {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about__title {
    font-size: 24px;
    font-weight: 800;
    color: var(--color-text);
    margin-bottom: 20px;
}

.about__desc {
    font-size: 16px;
    color: var(--color-text-light);
    line-height: 1.9;
    margin-bottom: 24px;
}

.about__desc strong {
    color: var(--color-primary);
}

.about__highlights {
    display: flex;
    gap: 24px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.about__highlight {
    text-align: center;
}

.about__highlight-num {
    font-size: 24px;
    font-weight: 800;
    color: var(--color-primary);
    margin-bottom: 4px;
}

.about__highlight-text {
    font-size: 13px;
    color: var(--color-text-light);
}

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

.about__card {
    background: var(--color-bg);
    border-radius: var(--radius-md);
    padding: 28px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.about__card:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(4px);
}

.about__card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.about__card-icon {
    width: 44px;
    height: 44px;
    background: var(--color-primary-bg);
    color: var(--color-primary);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
}

.about__card-header h4 {
    font-size: 17px;
    font-weight: 700;
    color: var(--color-text);
}

.about__card ul {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.about__card li {
    font-size: 14px;
    color: var(--color-text-light);
    padding-left: 20px;
    position: relative;
}

.about__card li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: 700;
}

/* ========== 联系我们 ========== */
.contact {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 48px;
}

.contact__info {
    display: flex;
    flex-direction: column;
    gap: 28px;
}

.contact__item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.contact__item-icon {
    width: 48px;
    height: 48px;
    background: var(--color-primary-bg);
    color: var(--color-primary);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact__item h4 {
    font-size: 16px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 4px;
}

.contact__item p {
    font-size: 14px;
    color: var(--color-text-light);
}

.contact__form-wrap {
    background: var(--color-bg);
    border-radius: var(--radius-md);
    padding: 48px 44px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.contact__form-wrap:hover {
    box-shadow: var(--shadow-lg);
}

.contact__form-wrap--centered {
    max-width: 620px;
    margin: 0 auto;
}

.required {
    color: var(--color-accent);
}

.contact__form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 0;
}

.contact__form-group {
    margin-bottom: 20px;
}

.contact__form-group label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 8px;
}

.contact__form-group input,
.contact__form-group select,
.contact__form-group textarea {
    width: 100%;
    padding: 12px 16px;
    font-size: 15px;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-bg-alt);
    color: var(--color-text);
    transition: var(--transition-fast);
    font-family: inherit;
}

.contact__form-group input:focus,
.contact__form-group select:focus,
.contact__form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    background: #fff;
    box-shadow: 0 0 0 3px rgba(14, 138, 110, 0.1);
}

.contact__form-group textarea {
    resize: vertical;
}

.contact__form-note {
    margin-top: 12px;
    font-size: 14px;
    text-align: center;
    min-height: 20px;
}

.contact__form-note.success {
    color: var(--color-primary);
}

.contact__form-note.error {
    color: #e53935;
}

/* ========== Footer ========== */
.footer {
    background: var(--color-bg-dark);
    color: rgba(255, 255, 255, 0.7);
    padding: 60px 0 24px;
}

.footer__top {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer__brand {
    max-width: 320px;
}

.footer__logo {
    display: flex;
    align-items: center;
    gap: 12px;
    color: #fff;
    margin-bottom: 16px;
}

.footer__logo strong {
    font-size: 18px;
    display: block;
}

.footer__logo small {
    font-size: 12px;
    opacity: 0.7;
}

.footer__brand p {
    font-size: 14px;
    line-height: 1.8;
}

.footer__links h4 {
    font-size: 16px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 16px;
}

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

.footer__links a,
.footer__links li {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    transition: var(--transition-fast);
}

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

.footer__bottom {
    text-align: center;
}

.footer__bottom p {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.5);
    margin-bottom: 8px;
}

.footer__disclaimer {
    font-size: 12px !important;
    line-height: 1.8;
    opacity: 0.6;
}

/* ========== 回到顶部 ========== */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    color: #fff;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 16px rgba(14, 138, 110, 0.4);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition);
    z-index: 999;
}

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

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(14, 138, 110, 0.5);
}

/* ========== 页面加载动画 ========== */
.page-loader {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: linear-gradient(160deg, #f0faf7 0%, #ffffff 50%, #eef7fd 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.6s ease, visibility 0.6s ease;
}

.page-loader.hidden {
    opacity: 0;
    visibility: hidden;
}

.page-loader__content {
    text-align: center;
}

.page-loader__spinner {
    width: 56px;
    height: 56px;
    border: 4px solid var(--color-primary-bg);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    margin: 0 auto 20px;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.page-loader__text {
    font-size: 16px;
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: 2px;
}

.page-loader__sub {
    font-size: 12px;
    color: var(--color-text-light);
    margin-top: 6px;
}

/* ========== 滚动进度条 ========== */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
    z-index: 1001;
    transition: width 0.1s ease;
    box-shadow: 0 0 8px rgba(14, 138, 110, 0.4);
}

/* ========== 增强卡片悬停效果 ========== */
.product-card {
    overflow: hidden;
}

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}

.product-card:hover::before {
    transform: scaleX(1);
}

.product-card__icon {
    transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.product-card:hover .product-card__icon {
    transform: scale(1.15) rotate(-5deg);
}

/* 增强适应症卡片效果 */
.indication-card {
    overflow: hidden;
}

.indication-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 0;
    background: linear-gradient(transparent, var(--color-primary-bg));
    transition: height 0.4s ease;
    z-index: 0;
}

.indication-card:hover::after {
    height: 100%;
}

.indication-card > * {
    position: relative;
    z-index: 1;
}

.indication-card__icon {
    transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.indication-card:hover .indication-card__icon {
    transform: scale(1.1) translateY(-4px);
}

/* 增强临床研究卡片 */
.clinical-card {
    overflow: hidden;
}

.clinical-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, var(--color-primary), var(--color-primary-light));
    transform: scaleY(0);
    transform-origin: top;
    transition: transform 0.4s ease;
}

.clinical-card:hover::before {
    transform: scaleY(1);
}

/* ========== 增强按钮波纹效果 ========== */
.btn {
    position: relative;
    overflow: hidden;
}

.btn::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s ease, height 0.6s ease;
}

.btn:active::after {
    width: 300px;
    height: 300px;
}

/* ========== 导航栏毛玻璃增强 ========== */
.header {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(24px) saturate(200%);
    box-shadow: 0 4px 30px rgba(14, 138, 110, 0.08);
}

/* ========== Hero 增强光效 ========== */
.hero__product-glow {
    background: radial-gradient(circle, rgba(14, 138, 110, 0.25), transparent 70%);
}

/* ========== 数字计数器增强 ========== */
.hero__feature-num {
    text-shadow: 0 2px 8px rgba(14, 138, 110, 0.15);
}

/* ========== 安全性环形图增强 ========== */
.safety__stat-circle:hover .safety__stat-progress {
    filter: drop-shadow(0 0 8px rgba(14, 138, 110, 0.3));
}

/* ========== 用法步骤连接线增强 ========== */
.usage__connector svg path {
    stroke-dasharray: 100;
    stroke-dashoffset: 100;
    animation: drawLine 1.5s ease forwards;
    animation-delay: 0.5s;
}

@keyframes drawLine {
    to { stroke-dashoffset: 0; }
}

/* ========== 全局选中文字色 ========== */
::selection {
    background: var(--color-primary);
    color: #fff;
}

::-moz-selection {
    background: var(--color-primary);
    color: #fff;
}

/* ========== 滚动条美化 ========== */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg-alt);
}

::-webkit-scrollbar-thumb {
    background: var(--color-primary);
    border-radius: 5px;
    border: 2px solid var(--color-bg-alt);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-primary-dark);
}

/* ========== 增强动画 ========== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* 左侧滑入 */
.slide-in-left {
    opacity: 0;
    transform: translateX(-40px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.slide-in-left.visible {
    opacity: 1;
    transform: translateX(0);
}

/* 右侧滑入 */
.slide-in-right {
    opacity: 0;
    transform: translateX(40px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.slide-in-right.visible {
    opacity: 1;
    transform: translateX(0);
}

/* 缩放进入 */
.zoom-in {
    opacity: 0;
    transform: scale(0.85);
    transition: opacity 0.6s ease, transform 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.zoom-in.visible {
    opacity: 1;
    transform: scale(1);
}

/* ========== 常见问题 (FAQ) ========== */
.faq {
    max-width: 800px;
    margin: 0 auto;
}

.faq__item {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    margin-bottom: 12px;
    overflow: hidden;
    transition: var(--transition);
    background: var(--color-bg);
}

.faq__item:hover {
    border-color: rgba(14, 138, 110, 0.3);
    box-shadow: var(--shadow-sm);
}

.faq__item.active {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
}

.faq__question {
    width: 100%;
    padding: 20px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    color: var(--color-text);
    text-align: left;
    font-family: inherit;
    transition: var(--transition-fast);
}

.faq__question:hover {
    color: var(--color-primary);
    background: var(--color-primary-bg);
}

.faq__item.active .faq__question {
    color: var(--color-primary);
    background: var(--color-primary-bg);
}

.faq__icon {
    flex-shrink: 0;
    color: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.3s ease;
}

.faq__item.active .faq__icon {
    transform: rotate(180deg);
}

.faq__item.active .faq__icon svg path:first-child {
    opacity: 0;
}

.faq__icon svg path:first-child {
    transition: opacity 0.3s ease;
}

.faq__answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.3s ease;
    padding: 0 24px;
}

.faq__item.active .faq__answer {
    max-height: 400px;
    padding: 0 24px 20px;
}

.faq__answer p {
    font-size: 15px;
    color: var(--color-text-light);
    line-height: 1.8;
}

.faq__answer strong {
    color: var(--color-primary);
}

/* ========== Cookie 同意横幅 ========== */
.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 1001;
    background: var(--color-bg-dark);
    color: rgba(255, 255, 255, 0.9);
    padding: 16px 24px;
    transform: translateY(100%);
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 -4px 30px rgba(0, 0, 0, 0.15);
}

.cookie-banner.show {
    transform: translateY(0);
}

.cookie-banner__content {
    max-width: var(--container-max);
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 16px;
}

.cookie-banner__icon {
    color: var(--color-primary-light);
    flex-shrink: 0;
}

.cookie-banner__text {
    flex: 1;
}

.cookie-banner__text p {
    font-size: 14px;
    line-height: 1.6;
}

.cookie-banner__text a {
    color: var(--color-primary-light);
    text-decoration: underline;
}

.cookie-banner__actions {
    display: flex;
    gap: 8px;
    flex-shrink: 0;
}

.cookie-banner__btn {
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 600;
    border: 2px solid transparent;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition-fast);
    font-family: inherit;
    white-space: nowrap;
}

.cookie-banner__btn--accept {
    background: var(--color-primary);
    color: #fff;
}

.cookie-banner__btn--accept:hover {
    background: var(--color-primary-dark);
    transform: translateY(-1px);
}

.cookie-banner__btn--decline {
    background: transparent;
    color: rgba(255, 255, 255, 0.8);
    border-color: rgba(255, 255, 255, 0.3);
}

.cookie-banner__btn--decline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.5);
}

@media (max-width: 768px) {
    .cookie-banner__content {
        flex-direction: column;
        text-align: center;
        gap: 12px;
    }

    .cookie-banner__icon {
        display: none;
    }
}

/* ========== 面包屑导航 ========== */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 0;
    font-size: 13px;
    color: var(--color-text-light);
}

.breadcrumb a {
    color: var(--color-text-light);
    transition: var(--transition-fast);
}

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

.breadcrumb__sep {
    color: var(--color-border);
}

.breadcrumb__current {
    color: var(--color-text);
    font-weight: 600;
}

/* ========== 无障碍焦点样式 ========== */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

/* 跳转主内容链接 (屏幕阅读器) */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-primary);
    color: #fff;
    padding: 8px 16px;
    border-radius: 0 0 var(--radius-sm) 0;
    font-size: 14px;
    font-weight: 600;
    z-index: 10000;
    transition: top 0.3s ease;
}

.skip-link:focus {
    top: 0;
    color: #fff;
}

/* ========== 打印样式 ========== */
@media print {
    .header,
    .nav__toggle,
    .back-to-top,
    .scroll-progress,
    .page-loader,
    .hero__bg,
    .hero__wave,
    .contact__form-wrap,
    .footer__links {
        display: none !important;
    }

    .section {
        padding: 30px 0;
        page-break-inside: avoid;
    }

    .hero {
        min-height: auto;
        padding: 30px 0;
    }

    .product-card,
    .indication-card,
    .clinical-card {
        box-shadow: none;
        border: 1px solid #ccc;
    }

    .faq__answer {
        max-height: none !important;
        padding: 8px 0 !important;
    }

    body {
        font-size: 12px;
        color: #000;
        background: #fff;
    }
}

/* ========== 主题切换按钮 ========== */
.nav__theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--color-primary-bg);
    border: 1px solid var(--color-border);
    border-radius: 50%;
    cursor: pointer;
    color: var(--color-primary);
    transition: var(--transition);
    flex-shrink: 0;
}

.nav__theme-toggle:hover {
    background: var(--color-primary);
    color: #fff;
    transform: rotate(15deg);
}

.nav__theme-icon--dark {
    display: none;
}

[data-theme="dark"] .nav__theme-icon--light {
    display: none;
}

[data-theme="dark"] .nav__theme-icon--dark {
    display: block;
}

/* ========== 暗色模式 ========== */
[data-theme="dark"] {
    --color-text: #e0e6ed;
    --color-text-light: #9eafc0;
    --color-text-muted: #6a7a8a;
    --color-border: #1e2a3a;
    --color-bg: #0d1b2a;
    --color-bg-alt: #122233;
    --color-bg-dark: #050d15;
    --color-primary-bg: rgba(14, 138, 110, 0.15);

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.6);
}

[data-theme="dark"] body {
    background: var(--color-bg);
}

[data-theme="dark"] .hero {
    background: linear-gradient(160deg, #0d1b2a 0%, #122233 50%, #0d1b2a 100%);
}

[data-theme="dark"] .header {
    background: rgba(13, 27, 42, 0.85);
    backdrop-filter: blur(20px) saturate(180%);
}

[data-theme="dark"] .header.scrolled {
    background: rgba(13, 27, 42, 0.95);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .nav__menu {
    background: var(--color-bg) !important;
}

[data-theme="dark"] .hero__bg-circle--1 {
    background: radial-gradient(circle, rgba(26, 169, 136, 0.4), transparent);
}

[data-theme="dark"] .product-card,
[data-theme="dark"] .indication-card,
[data-theme="dark"] .clinical-card,
[data-theme="dark"] .usage__card,
[data-theme="dark"] .usage__schedule,
[data-theme="dark"] .about__card,
[data-theme="dark"] .contact__form-wrap,
[data-theme="dark"] .mechanism__diagram {
    background: var(--color-bg-alt);
    border-color: var(--color-border);
}

[data-theme="dark"] .product-card--highlight {
    background: linear-gradient(135deg, rgba(14, 138, 110, 0.15), var(--color-bg-alt));
}

[data-theme="dark"] .contact__form-group input,
[data-theme="dark"] .contact__form-group select,
[data-theme="dark"] .contact__form-group textarea {
    background: var(--color-bg);
    color: var(--color-text);
    border-color: var(--color-border);
}

[data-theme="dark"] .contact__form-group input:focus,
[data-theme="dark"] .contact__form-group select:focus,
[data-theme="dark"] .contact__form-group textarea:focus {
    border-color: var(--color-primary);
    background: var(--color-bg-alt);
}

[data-theme="dark"] .indications-note {
    background: rgba(255, 193, 7, 0.1);
    border-color: rgba(255, 193, 7, 0.3);
}

[data-theme="dark"] .indications-note p {
    color: #ffd54f;
}

[data-theme="dark"] .indications-note__icon {
    color: #ffd54f;
}

[data-theme="dark"] .faq__question {
    color: var(--color-text);
}

[data-theme="dark"] .safety__bar-track {
    background: var(--color-bg);
}

[data-theme="dark"] .cookie-banner {
    background: var(--color-bg-dark);
}

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
    .product-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .mechanism {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .safety {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .safety__stat {
        margin: 0 auto;
    }

    .about {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .contact {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .nav__menu {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        padding: 16px;
        gap: 4px;
        box-shadow: var(--shadow-md);
        transform: translateY(-200%);
        opacity: 0;
        transition: var(--transition);
        max-height: calc(100vh - 72px);
        overflow-y: auto;
    }

    .nav__menu.active {
        transform: translateY(0);
        opacity: 1;
    }

    .nav__link {
        display: block;
        padding: 14px 20px;
        border-radius: var(--radius-sm);
    }

    .nav__link.active::after {
        display: none;
    }

    .nav__toggle {
        display: flex;
    }

    .hero__content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 40px;
    }

    .hero__features {
        justify-content: center;
    }

    .hero__actions {
        justify-content: center;
    }

    .hero__visual {
        order: -1;
    }

    .hero__product {
        width: 240px;
        height: 320px;
    }

    .hero__product-tube {
        width: 120px;
        height: 230px;
    }

    .hero__product-tube-body {
        width: 120px;
        height: 200px;
        padding-top: 28px;
    }

    .hero__product-tube-cap {
        width: 52px;
        height: 30px;
    }

    .hero__product-tube-name {
        font-size: 16px;
    }

    .section {
        padding: 64px 0;
    }

    .product-grid,
    .indications-grid,
    .clinical-grid {
        grid-template-columns: 1fr;
    }

    .product-info__item {
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
    }

    .product-info__label {
        width: auto;
    }

    .usage__main {
        flex-direction: column;
        align-items: center;
    }

    .usage__connector {
        transform: rotate(90deg);
        padding: 12px 0;
    }

    .usage__schedule-items {
        grid-template-columns: 1fr;
    }

    .usage__tips {
        flex-direction: column;
        gap: 16px;
    }

    .usage__tips-content ul {
        grid-template-columns: 1fr;
    }

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

    .safety__bar-label {
        width: 100px;
        font-size: 12px;
    }

    .footer__top {
        grid-template-columns: 1fr 1fr;
        gap: 28px;
    }

    .contact__form-row {
        grid-template-columns: 1fr;
    }

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

    .nav__theme-toggle {
        width: 36px;
        height: 36px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .nav__theme-toggle {
        display: none;
    }

    .hero__title {
        font-size: 2rem;
    }

    .hero__features {
        flex-direction: column;
        gap: 16px;
    }

    .hero__feature-divider {
        width: 40px;
        height: 1px;
    }

    .hero__actions {
        flex-direction: column;
        width: 100%;
    }

    .btn {
        width: 100%;
    }

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