/* =========================================================
   1. 容器与基础排版
   ========================================================= */
.supplier-article {
    box-sizing: border-box;
    max-width: 1920px;
    margin: 0 auto;
    padding: 20px;
    color: #374151;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 18px;
    line-height: 1.75;
}

.supplier-article *,
.supplier-article *::before,
.supplier-article *::after {
    box-sizing: border-box;
}

.supplier-article h2,
.supplier-article h3,
.supplier-article h4,
.supplier-article p,
.supplier-article li,
.supplier-article th,
.supplier-article td,
.supplier-article a,
.supplier-article small {
    font-family: Arial, Helvetica, sans-serif;
}

.supplier-article h2 {
    margin: 44px 0 16px;
    padding-bottom: 10px;
    border-bottom: 2px solid #e2e8f0;
    color: #12314f;
    font-size: 24px;
    font-weight: 700;
    line-height: 1.35;
}

.supplier-article h3 {
    margin: 26px 0 10px;
    color: #1a365d;
    font-size: 19px;
    font-weight: 700;
    line-height: 1.45;
}

.supplier-article p {
    margin: 0 0 16px;
    font-size: 18px;
}

.supplier-article a {
    color: #3598db;
    text-decoration: underline;
}

.supplier-article a:hover {
    color: #1f6fa8;
}

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

/* =========================================================
   2. 开篇导语
   ========================================================= */
.article-intro {
    padding: 22px 24px 6px;
    border-left: 5px solid #3598db;
    border-radius: 8px;
    background: #f5f9fd;
}

/* =========================================================
   3. 采购标准板块
   ========================================================= */
.buying-criteria .criteria-step {
    margin-bottom: 18px;
    padding: 18px 20px;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    background: #ffffff;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.04);
    transition: box-shadow 0.3s ease, transform 0.3s ease;
}

.buying-criteria .criteria-step:hover {
    box-shadow: 0 6px 14px rgba(0, 0, 0, 0.07);
    transform: translateY(-2px);
}

.buying-criteria .criteria-step h3 {
    margin-top: 0;
}

.buying-criteria .criteria-step p:last-child,
.buying-criteria .criteria-step ul:last-child {
    margin-bottom: 0;
}

/* 采购自查清单 */
.checklist {
    margin: 14px 0 0;
    padding-left: 0;
    list-style: none;
}

.checklist li {
    position: relative;
    margin-bottom: 10px;
    padding-left: 30px;
    font-size: 17px;
    line-height: 1.6;
}

.checklist li:last-child {
    margin-bottom: 0;
}

.checklist li::before {
    content: "";
    position: absolute;
    top: 9px;
    left: 0;
    width: 15px;
    height: 15px;
    border-radius: 50%;
    background: #3598db;
    box-shadow: inset 0 0 0 4px #ffffff;
}

/* =========================================================
   4. 对比表格
   ========================================================= */
.table-responsive {
    margin: 22px 0 16px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.table-responsive table {
    width: 100%;
    min-width: 860px;
    border-collapse: collapse;
    background: #ffffff;
    font-size: 16px;
}

.table-responsive caption {
    padding-bottom: 10px;
    color: #4a5568;
    font-size: 15px;
    text-align: left;
}

.table-responsive th,
.table-responsive td {
    padding: 13px 14px;
    border: 1px solid #e2e8f0;
    text-align: left;
    vertical-align: top;
    line-height: 1.55;
}

.table-responsive thead th {
    background: #12314f;
    color: #ffffff;
    font-weight: 700;
    white-space: nowrap;
}

.table-responsive tbody tr:nth-child(even) {
    background: #f8fafc;
}

.table-responsive tbody tr:hover {
    background: #eef4fa;
}

.table-responsive tbody tr:first-child td {
    background: #f2f8fd;
    font-weight: 400;
}

.table-note {
    display: block;
    margin-bottom: 10px;
    color: #4a5568;
    font-size: 15px;
    line-height: 1.6;
}

/* =========================================================
   5. 供应商列表
   ========================================================= */
.supplier-list {
    margin: 24px 0 30px;
    padding-left: 0;
    list-style: none;
    counter-reset: supplier;
}

.supplier-list > li {
    position: relative;
    margin-bottom: 20px;
    padding: 20px 22px 20px 64px;
    border: 1px solid #e2e8f0;
    border-left: 4px solid #3598db;
    border-radius: 8px;
    background: #ffffff;
    counter-increment: supplier;
}

.supplier-list > li::before {
    content: counter(supplier);
    position: absolute;
    top: 22px;
    left: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: #12314f;
    color: #ffffff;
    font-size: 15px;
    font-weight: 700;
}

.supplier-list > li h3 {
    margin-top: 0;
}

.supplier-list > li p:last-child {
    margin-bottom: 0;
}

.supplier-list .supplier-photo {
    display: block;
    margin-top: 16px;
}

/* =========================================================
   6. SEA HEART 实力模块
   ========================================================= */
.sea-heart-proof-module {
    margin: 24px 0 28px;
    padding: 24px;
    border: 1px solid #d6e4f0;
    border-radius: 8px;
    background: #f5f9fd;
}

.sea-heart-proof-module h3 {
    margin-top: 0;
}

.sea-heart-proof-module ul {
    margin: 0;
    padding-left: 0;
    list-style: none;
}

.sea-heart-proof-module li {
    position: relative;
    margin-bottom: 12px;
    padding-left: 30px;
    font-size: 17px;
    line-height: 1.6;
}

.sea-heart-proof-module li:last-child {
    margin-bottom: 0;
}

.sea-heart-proof-module li::before {
    content: "";
    position: absolute;
    top: 9px;
    left: 0;
    width: 15px;
    height: 15px;
    border-radius: 50%;
    background: #12314f;
    box-shadow: inset 0 0 0 4px #ffffff;
}

/* 通用按钮 */
.btn {
    display: inline-block;
    margin-top: 6px;
    padding: 15px 34px;
    border-radius: 6px;
    background: #e53e3e;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.12);
    color: #ffffff;
    font-size: 17px;
    font-weight: 700;
    text-decoration: none;
    transition: background 0.3s ease, transform 0.3s ease;
}

.btn:hover {
    background: #c53030;
    color: #ffffff;
    text-decoration: none;
    transform: translateY(-2px);
}

/* =========================================================
   7. 通用要点清单
   ========================================================= */
.reason-list {
    margin: 16px 0 22px;
    padding-left: 0;
    list-style: none;
    counter-reset: reason;
}

.reason-list li {
    position: relative;
    margin-bottom: 10px;
    padding: 12px 16px 12px 48px;
    border-left: 4px solid #cbd5e0;
    border-radius: 0 6px 6px 0;
    background: #f8fafc;
    font-size: 17px;
    line-height: 1.6;
    counter-increment: reason;
}

.reason-list li::before {
    content: counter(reason);
    position: absolute;
    top: 12px;
    left: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: #3598db;
    color: #ffffff;
    font-size: 13px;
    font-weight: 700;
}

/* =========================================================
   8. FAQ
   ========================================================= */
.faq-section {
    margin-top: 26px;
    padding: 26px;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    background: #f8fafc;
}

.faq-section h2 {
    margin-top: 0;
}

.faq-item {
    margin-bottom: 22px;
    padding-bottom: 20px;
    border-bottom: 1px solid #e2e8f0;
}

.faq-item:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.faq-item h3 {
    margin-top: 0;
}

.faq-item p {
    margin-bottom: 0;
}

/* =========================================================
   9. 响应式
   ========================================================= */
@media (max-width: 768px) {
    .supplier-article {
        padding: 15px;
        font-size: 16px;
    }

    .supplier-article h2 {
        margin-top: 34px;
        font-size: 20px;
    }

    .supplier-article h3 {
        font-size: 17px;
    }

    .supplier-article p,
    .checklist li,
    .reason-list li,
    .sea-heart-proof-module li {
        font-size: 16px;
    }

    .article-intro,
    .faq-section,
    .sea-heart-proof-module {
        padding: 18px;
    }

    .supplier-list > li {
        padding: 18px 16px 18px 16px;
    }

    .supplier-list > li::before {
        position: static;
        margin-bottom: 10px;
    }

    .btn {
        padding: 13px 26px;
        font-size: 16px;
    }
}

@media print {
    .btn {
        display: none;
    }
}