/* ===== 顶部英雄区 ===== */
.td-about__hero {
    background: linear-gradient(135deg, #003d6b 0%, #005496 40%, #0077c8 100%);
    padding: 60px 0 50px;
    margin-bottom: 0;
    position: relative;
    overflow: hidden;
}

.td-about__hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(255, 214, 102, 0.08) 0%, transparent 60%),
        radial-gradient(ellipse at 80% 30%, rgba(0, 180, 255, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.td-about__hero-inner {
    position: relative;
    z-index: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 10px;
    text-align: center;
}

.td-about__hero-icon {
    font-size: 48px;
    color: rgba(255, 255, 255, 0.2);
    margin-bottom: 12px;
}

.td-about__hero-title {
    font-size: 34px;
    font-weight: 700;
    color: #fff;
    margin: 0 0 10px;
    letter-spacing: 2px;
}

.td-about__hero-desc {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.8);
    margin: 0;
    line-height: 1.8;
    max-width: 640px;
    margin: 0 auto;
}

/* ===== 通用章节头 ===== */
.td-about__section {
    margin-top: 24px;
}

.td-about__section-title {
    font-size: 22px;
    font-weight: 700;
    color: #1a1a2e;
    text-align: center;
    margin: 0 0 6px;
}

.td-about__section-desc {
    font-size: 14px;
    color: #8a98a8;
    text-align: center;
    margin: 0 0 24px;
}

/* ===== 公司简介卡片 ===== */
.td-about__intro {
    background: #fff;
    border: 1px solid #dfe8f2;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 64, 128, 0.05);
    padding: 40px 44px;
    margin-top: 24px;
    display: flex;
    gap: 44px;
    align-items: flex-start;
}

.td-about__intro-logo {
    flex-shrink: 0;
    width: 120px;
    height: 120px;
    background: linear-gradient(135deg, #005496 0%, #0077c8 100%);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 52px;
    box-shadow: 0 8px 24px rgba(0, 84, 150, 0.2);
}

.td-about__intro-body {
    flex: 1;
    min-width: 0;
}

.td-about__intro-title {
    font-size: 22px;
    font-weight: 700;
    color: #1a1a2e;
    margin: 0 0 4px;
}

.td-about__intro-sub {
    font-size: 13px;
    color: #8a98a8;
    margin: 0 0 14px;
}

.td-about__intro-text {
    font-size: 14px;
    color: #4d6278;
    line-height: 2;
    margin: 0;
}

.td-about__intro-text strong {
    color: #005496;
}

/* ===== 数据统计条 ===== */
.td-about__stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
    margin-top: 24px;
}

.td-about__stat-item {
    background: #fff;
    border: 1px solid #dfe8f2;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 64, 128, 0.05);
    padding: 26px 16px;
    text-align: center;
    transition: transform 0.2s;
}

.td-about__stat-item:hover {
    transform: translateY(-2px);
}

.td-about__stat-num {
    font-size: 34px;
    font-weight: 700;
    color: #005496;
    font-family: Arial, sans-serif;
    line-height: 1.2;
}

.td-about__stat-label {
    font-size: 13px;
    color: #8a98a8;
    margin-top: 6px;
}

/* ===== 核心价值（6卡） ===== */
.td-about__values {
    margin-top: 24px;
}

.td-about__values-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
}

.td-about__value-card {
    background: #fff;
    border: 1px solid #dfe8f2;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 64, 128, 0.05);
    padding: 28px 22px 24px;
    text-align: center;
    transition: all 0.25s;
}

.td-about__value-card:hover {
    border-color: #bcd4ee;
    box-shadow: 0 12px 36px rgba(0, 64, 128, 0.1);
    transform: translateY(-3px);
}

.td-about__value-icon {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 14px;
    font-size: 24px;
}

.td-about__value-icon--blue    { background: rgba(0,84,150,0.1); color: #005496; }
.td-about__value-icon--green   { background: rgba(82,196,26,0.1); color: #52c41a; }
.td-about__value-icon--amber   { background: rgba(212,136,6,0.1); color: #d48806; }
.td-about__value-icon--red     { background: rgba(224,60,60,0.1); color: #e03c3c; }
.td-about__value-icon--purple  { background: rgba(114,46,209,0.1); color: #722ed1; }
.td-about__value-icon--indigo  { background: rgba(47,84,235,0.1); color: #2f54eb; }

.td-about__value-title {
    font-size: 15px;
    font-weight: 600;
    color: #1a1a2e;
    margin: 0 0 8px;
}

.td-about__value-desc {
    font-size: 13px;
    color: #8a98a8;
    margin: 0;
    line-height: 1.7;
}

/* ===== 业务范围 ===== */
.td-about__scope-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
}

.td-about__scope-card {
    background: #fff;
    border: 1px solid #dfe8f2;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 64, 128, 0.05);
    padding: 24px 18px 20px;
    text-align: center;
    transition: all 0.25s;
}

.td-about__scope-card:hover {
    border-color: #bcd4ee;
    box-shadow: 0 12px 36px rgba(0, 64, 128, 0.1);
    transform: translateY(-3px);
}

.td-about__scope-icon {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 12px;
    font-size: 28px;
}

.td-about__scope-icon--blue    { background: linear-gradient(135deg,#005496,#0077c8); color: #fff; }
.td-about__scope-icon--green   { background: linear-gradient(135deg,#52c41a,#73d13d); color: #fff; }
.td-about__scope-icon--amber   { background: linear-gradient(135deg,#d48806,#e8a317); color: #fff; }
.td-about__scope-icon--red     { background: linear-gradient(135deg,#e03c3c,#ff6b6b); color: #fff; }

.td-about__scope-title {
    font-size: 15px;
    font-weight: 600;
    color: #1a1a2e;
    margin: 0 0 6px;
}

.td-about__scope-desc {
    font-size: 12px;
    color: #8a98a8;
    margin: 0;
    line-height: 1.6;
}

/* ===== 平台特色（交替图文） ===== */
.td-about__features {
    margin-top: 24px;
}

.td-about__feature-item {
    display: flex;
    gap: 30px;
    align-items: center;
    background: #fff;
    border: 1px solid #dfe8f2;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 64, 128, 0.05);
    padding: 32px 36px;
    margin-bottom: 14px;
}

.td-about__feature-item:last-child {
    margin-bottom: 0;
}

.td-about__feature-item:nth-child(even) {
    flex-direction: row-reverse;
}

.td-about__feature-visual {
    flex-shrink: 0;
    width: 120px;
    height: 120px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    color: #fff;
}

.td-about__feature-visual--blue    { background: linear-gradient(135deg,#005496,#0077c8); }
.td-about__feature-visual--green   { background: linear-gradient(135deg,#52c41a,#73d13d); }
.td-about__feature-visual--amber   { background: linear-gradient(135deg,#d48806,#e8a317); }

.td-about__feature-body {
    flex: 1;
    min-width: 0;
}

.td-about__feature-title {
    font-size: 17px;
    font-weight: 600;
    color: #1a1a2e;
    margin: 0 0 8px;
}

.td-about__feature-text {
    font-size: 14px;
    color: #4d6278;
    line-height: 1.8;
    margin: 0;
}

.td-about__feature-tag {
    display: inline-block;
    font-size: 11px;
    font-weight: 600;
    padding: 2px 10px;
    border-radius: 4px;
    margin-bottom: 10px;
}

.td-about__feature-tag--blue   { background: rgba(0,84,150,0.08); color: #005496; }
.td-about__feature-tag--green  { background: rgba(82,196,26,0.08); color: #52c41a; }
.td-about__feature-tag--amber  { background: rgba(212,136,6,0.08); color: #d48806; }

/* ===== 发展历程 ===== */
.td-about__milestones {
    margin-top: 24px;
}

.td-about__timeline {
    position: relative;
    padding: 0;
}

.td-about__timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, #dfe8f2 0%, #005496 50%, #dfe8f2 100%);
    transform: translateX(-50%);
}

.td-about__timeline-item {
    display: flex;
    align-items: flex-start;
    position: relative;
    margin-bottom: 24px;
}

.td-about__timeline-item:nth-child(odd)  { flex-direction: row; }
.td-about__timeline-item:nth-child(even) { flex-direction: row-reverse; }

.td-about__timeline-content {
    width: calc(50% - 36px);
    background: #fff;
    border: 1px solid #dfe8f2;
    border-radius: 10px;
    box-shadow: 0 6px 20px rgba(0, 64, 128, 0.05);
    padding: 18px 22px;
}

.td-about__timeline-dot {
    position: absolute;
    left: 50%;
    top: 20px;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: #005496;
    border: 4px solid #fff;
    box-shadow: 0 0 0 2px #005496, 0 4px 12px rgba(0, 84, 150, 0.2);
    transform: translateX(-50%);
    z-index: 1;
}

.td-about__timeline-year {
    font-size: 13px;
    font-weight: 700;
    color: #005496;
    margin: 0 0 4px;
}

.td-about__timeline-title {
    font-size: 14px;
    font-weight: 600;
    color: #1a1a2e;
    margin: 0 0 4px;
}

.td-about__timeline-text {
    font-size: 13px;
    color: #8a98a8;
    margin: 0;
    line-height: 1.6;
}

/* ===== 团队介绍 ===== */
.td-about__team {
    margin-top: 24px;
}

.td-about__team-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
}

.td-about__team-card {
    background: #fff;
    border: 1px solid #dfe8f2;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 64, 128, 0.05);
    padding: 28px 16px 22px;
    text-align: center;
    transition: all 0.25s;
}

.td-about__team-card:hover {
    border-color: #bcd4ee;
    transform: translateY(-3px);
    box-shadow: 0 12px 36px rgba(0, 64, 128, 0.1);
}

.td-about__team-avatar {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    margin: 0 auto 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    color: #fff;
}

.td-about__team-avatar--blue    { background: linear-gradient(135deg,#005496,#0077c8); }
.td-about__team-avatar--green   { background: linear-gradient(135deg,#52c41a,#73d13d); }
.td-about__team-avatar--amber   { background: linear-gradient(135deg,#d48806,#e8a317); }
.td-about__team-avatar--red     { background: linear-gradient(135deg,#e03c3c,#ff6b6b); }
.td-about__team-avatar--purple  { background: linear-gradient(135deg,#722ed1,#9c6ade); }
.td-about__team-avatar--indigo  { background: linear-gradient(135deg,#2f54eb,#597ef7); }

.td-about__team-name {
    font-size: 15px;
    font-weight: 600;
    color: #1a1a2e;
    margin: 0 0 2px;
}

.td-about__team-role {
    font-size: 12px;
    color: #8a98a8;
    margin: 0 0 8px;
}

.td-about__team-desc {
    font-size: 12px;
    color: #b0becd;
    margin: 0;
    line-height: 1.6;
}

/* ===== 合作伙伴 ===== */
.td-about__partners {
    margin-top: 24px;
}

.td-about__partner-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 14px;
}

.td-about__partner-item {
    background: #fff;
    border: 1px solid #dfe8f2;
    border-radius: 10px;
    box-shadow: 0 6px 20px rgba(0, 64, 128, 0.04);
    padding: 22px 14px;
    text-align: center;
    transition: all 0.25s;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 90px;
}

.td-about__partner-item:hover {
    border-color: #bcd4ee;
    box-shadow: 0 8px 28px rgba(0, 64, 128, 0.08);
    transform: translateY(-2px);
}

.td-about__partner-icon {
    width: 52px;
    height: 52px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 8px;
    font-size: 24px;
    color: #fff;
}

.td-about__partner-icon--blue    { background: linear-gradient(135deg,#005496,#0077c8); }
.td-about__partner-icon--green   { background: linear-gradient(135deg,#52c41a,#73d13d); }
.td-about__partner-icon--amber   { background: linear-gradient(135deg,#d48806,#e8a317); }
.td-about__partner-icon--red     { background: linear-gradient(135deg,#e03c3c,#ff6b6b); }
.td-about__partner-icon--gray    { background: linear-gradient(135deg,#8a98a8,#b0becd); }

.td-about__partner-name {
    font-size: 12px;
    font-weight: 600;
    color: #4d6278;
    margin: 0;
}

/* ===== 服务承诺（步骤条） ===== */
.td-about__promise {
    margin-top: 24px;
}

.td-about__promise-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
    position: relative;
}

.td-about__promise-steps::before {
    content: '';
    position: absolute;
    top: 32px;
    left: 10%;
    right: 10%;
    height: 2px;
    background: linear-gradient(90deg, #dfe8f2 0%, #005496 30%, #005496 70%, #dfe8f2 100%);
    z-index: 0;
}

.td-about__promise-step {
    text-align: center;
    position: relative;
    z-index: 1;
}

.td-about__promise-num {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 12px;
    font-size: 22px;
    font-weight: 700;
    color: #fff;
    background: linear-gradient(135deg, #005496, #0077c8);
    box-shadow: 0 6px 20px rgba(0, 84, 150, 0.2);
}

.td-about__promise-title {
    font-size: 14px;
    font-weight: 600;
    color: #1a1a2e;
    margin: 0 0 4px;
}

.td-about__promise-desc {
    font-size: 12px;
    color: #8a98a8;
    margin: 0;
    line-height: 1.6;
    padding: 0 8px;
}