@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@400;500;600;700;800&display=swap');

:root {
    --green: #237a55;
    --dark-green: #123e32;
    --light-green: #eaf4e9;
    --mint: #d8ebdc;
    --cream: #f8f8ef;
    --text: #20382f;
    --muted: #718078;
    --white: #ffffff;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif;
    background: var(--cream);
    color: var(--text);
    line-height: 1.7;
}

button, input {
    font: inherit;
}

button {
    cursor: pointer;
}

/* 顶部主视觉 */

.hero {
    min-height: 560px;
    padding: 25px 8%;
    position: relative;
    overflow: hidden;
    background:
            radial-gradient(circle at 85% 30%, #c4e4c8 0, transparent 28%),
            linear-gradient(125deg, #e9f3e5, #f8f8ef 65%, #dceee0);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: auto;
}

.logo {
    color: var(--dark-green);
    text-decoration: none;
    font-weight: 800;
    font-size: 21px;
    letter-spacing: 1px;
}

.nav-tag {
    font-size: 11px;
    color: var(--green);
    letter-spacing: 3px;
}

.hero-content {
    max-width: 1200px;
    margin: 100px auto 80px;
    position: relative;
    z-index: 2;
}

.eyebrow, .section-kicker {
    color: var(--green);
    font-size: 12px;
    letter-spacing: 3px;
    font-weight: 700;
}

.hero h1 {
    font-size: clamp(38px, 6vw, 66px);
    line-height: 1.3;
    color: var(--dark-green);
    margin: 22px 0;
}

.hero h1 span {
    color: var(--green);
}

.hero-content p {
    max-width: 510px;
    color: #65776b;
    font-size: 16px;
    margin-bottom: 30px;
}

.hero-button {
    display: inline-block;
    padding: 13px 25px;
    border-radius: 30px;
    background: var(--green);
    color: white;
    text-decoration: none;
    transition: .25s;
}

.hero-button:hover {
    background: var(--dark-green);
    transform: translateY(-3px);
}

.hero-decoration {
    position: absolute;
    right: 10%;
    bottom: 70px;
    font-size: clamp(55px, 10vw, 120px);
    font-weight: 800;
    line-height: .9;
    color: rgba(35, 122, 85, .09);
    text-align: right;
    letter-spacing: 8px;
}

/* 通用版块 */

main {
    max-width: 1200px;
    margin: auto;
    padding: 0 6%;
}

.intro-section, .explore-section,
.detail-section, .science-section {
    padding: 85px 0;
}

.intro-section h2, .section-heading h2,
.action-section h2 {
    font-size: clamp(28px, 4vw, 40px);
    line-height: 1.4;
    color: var(--dark-green);
    margin: 18px 0;
}

.intro-section > p, .section-heading p {
    color: var(--muted);
    max-width: 650px;
}

.intro-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
    margin-top: 40px;
}

.intro-stats div {
    background: white;
    padding: 23px;
    border-radius: 16px;
    border: 1px solid #e6ede4;
}

.intro-stats strong {
    display: block;
    color: var(--green);
    font-size: 32px;
}

.intro-stats span {
    color: var(--muted);
    font-size: 13px;
}

.section-heading {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
    margin-bottom: 25px;
}

.section-number {
    font-size: 10px;
    color: #91a397;
    letter-spacing: 2px;
}

/* 搜索和分类 */

.search-box {
    display: flex;
    gap: 10px;
    background: white;
    border: 1px solid #e1eae0;
    border-radius: 14px;
    padding: 8px;
    margin: 28px 0 20px;
}

.search-box input {
    flex: 1;
    min-width: 0;
    border: none;
    outline: none;
    padding: 10px 14px;
    background: transparent;
}

.search-box button {
    border: none;
    border-radius: 10px;
    background: var(--green);
    color: white;
    padding: 10px 25px;
}

.category-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 25px;
}

.category {
    border: 1px solid #dbe7db;
    color: #64786a;
    background: white;
    border-radius: 30px;
    padding: 8px 18px;
    font-size: 13px;
}

.category.active, .category:hover {
    background: var(--dark-green);
    color: white;
    border-color: var(--dark-green);
}

/* 包装卡片：横向排列 */

.package-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}

.package-card {
    display: flex;
    align-items: center;
    gap: 18px;
    padding: 20px;
    min-height: 115px;
    background: white;
    border: 1px solid #e6ede4;
    border-radius: 17px;
    cursor: pointer;
    transition: .25s;
    text-align: left;
}

.package-card:hover, .package-card.selected {
    border-color: #75ae84;
    box-shadow: 0 8px 25px rgba(36, 95, 60, .09);
    transform: translateY(-3px);
}

.package-emoji {
    flex-shrink: 0;
    width: 65px;
    height: 65px;
    display: grid;
    place-items: center;
    border-radius: 17px;
    background: var(--light-green);
    font-size: 34px;
}

.package-info h3 {
    font-size: 16px;
    color: var(--dark-green);
    margin-bottom: 5px;
}

.package-info p {
    color: var(--muted);
    font-size: 12px;
}

.package-label {
    display: inline-block;
    margin-top: 6px;
    font-size: 10px;
    color: var(--green);
    background: #eff7ee;
    padding: 2px 9px;
    border-radius: 20px;
}

.empty-message {
    padding: 30px;
    text-align: center;
    color: var(--muted);
}

/* 材料档案 */

.detail-panel {
    background: white;
    border: 1px solid #e4ece3;
    border-radius: 20px;
    padding: 30px;
    min-height: 250px;
}

.detail-placeholder {
    text-align: center;
    padding: 35px 10px;
}

.detail-placeholder span {
    font-size: 42px;
}

.detail-placeholder h3 {
    margin: 12px 0;
    color: var(--dark-green);
}

.detail-placeholder p {
    color: var(--muted);
    font-size: 14px;
}

.detail-top {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 25px;
}

.detail-icon {
    width: 75px;
    height: 75px;
    display: grid;
    place-items: center;
    background: var(--light-green);
    border-radius: 20px;
    font-size: 40px;
    flex-shrink: 0;
}

.detail-top h3 {
    font-size: 24px;
    color: var(--dark-green);
}

.detail-top p {
    color: var(--muted);
    font-size: 13px;
}

.detail-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
}

.detail-item {
    background: #f6f8f2;
    padding: 17px;
    border-radius: 12px;
}

.detail-item strong {
    display: block;
    color: var(--green);
    font-size: 13px;
    margin-bottom: 7px;
}

.detail-item p {
    font-size: 13px;
    color: #64736a;
}

/* 生命科学关系 */

.science-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 25px 0;
}

.science-tab {
    border: 1px solid #dce8dd;
    border-radius: 30px;
    padding: 9px 18px;
    color: var(--green);
    background: white;
}

.science-tab.active {
    background: var(--dark-green);
    color: white;
}

.science-map {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    align-items: stretch;
}

.science-node {
    background: white;
    border: 1px solid #e4ece3;
    padding: 22px 12px;
    text-align: center;
    border-radius: 15px;
    position: relative;
}

.science-node:not(:last-child)::after {
    content: "→";
    position: absolute;
    right: -13px;
    top: 40%;
    color: var(--green);
    font-weight: bold;
    z-index: 2;
}

.science-node span {
    display: block;
    font-size: 26px;
    margin-bottom: 8px;
}

.science-node strong {
    display: block;
    font-size: 13px;
    color: var(--dark-green);
}

.science-node p {
    font-size: 11px;
    color: var(--muted);
    margin-top: 6px;
}

.science-note {
    margin-top: 18px;
    padding: 15px;
    background: #edf5e9;
    color: #58735d;
    border-radius: 12px;
    font-size: 12px;
}

/* 行动版块和页脚 */

.action-section {
    margin: 35px 0 80px;
    padding: 60px;
    border-radius: 25px;
    background: linear-gradient(120deg, #dcefdc, #eff4e7);
}

.action-section p {
    max-width: 600px;
    color: #64766a;
    margin-bottom: 25px;
}

footer {
    text-align: center;
    padding: 35px 15px;
    background: var(--dark-green);
    color: white;
}

.footer-logo {
    font-size: 22px;
    font-weight: 800;
}

footer p {
    font-size: 12px;
    color: #c4d8ca;
    margin-top: 8px;
}

.footer-small {
    opacity: .65;
}

/* 手机适配 */

@media (max-width: 650px) {
    .hero {
        min-height: 490px;
        padding: 20px 6%;
    }

    .hero-content {
        margin-top: 90px;
    }

    .hero-decoration {
        right: 5%;
        bottom: 30px;
    }

    main {
        padding: 0 5%;
    }

    .intro-section, .explore-section,
    .detail-section, .science-section {
        padding: 55px 0;
    }

    .intro-stats {
        gap: 8px;
    }

    .intro-stats div {
        padding: 12px;
    }

    .intro-stats strong {
        font-size: 25px;
    }

    .intro-stats span {
        font-size: 11px;
    }

    .section-heading {
        display: block;
    }

    .section-number {
        display: block;
        margin-top: 10px;
    }

    .package-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .package-card {
        min-height: 95px;
        padding: 14px;
    }

    .package-emoji {
        width: 58px;
        height: 58px;
        font-size: 30px;
    }

    .detail-panel {
        padding: 18px;
    }

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

    .science-map {
        grid-template-columns: 1fr;
    }

    .science-node:not(:last-child)::after {
        content: "↓";
        right: 50%;
        top: auto;
        bottom: -20px;
        transform: translateX(50%);
    }

    .science-node {
        padding: 15px;
    }

    .action-section {
        padding: 30px 22px;
    }
}