@font-face {
    font-family: "HarmonyOS Sans";
    src: url("fonts/HarmonyOS_Sans_SC_Light.ttf") format("truetype");
    font-weight: 300;
    font-style: normal;
}

@font-face {
    font-family: "HarmonyOS Sans";
    src: url("fonts/HarmonyOS_Sans_SC_Regular.ttf") format("truetype");
    font-weight: 400;
    font-style: normal;
}

@font-face {
    font-family: "HarmonyOS Sans";
    src: url("fonts/HarmonyOS_Sans_SC_Medium.ttf") format("truetype");
    font-weight: 500;
    font-style: normal;
}

@font-face {
    font-family: "HarmonyOS Sans";
    src: url("fonts/HarmonyOS_Sans_SC_Bold.ttf") format("truetype");
    font-weight: 700;
    font-style: normal;
}

:root {
    --brand-orange: #ff6633;
    --brand-dark: #1a1a1a;
    --text: #333;
    --bg: #fff;
    --blue: #3496f9;
    --green: #44c883;
    --gold: #ffd100;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: "HarmonyOS Sans", "Segoe UI", "PingFang HK", "Microsoft JhengHei", sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
}

main {
    background: url(img/b-bg.png) var(--bg) bottom center no-repeat;
}

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

header {
    position: absolute;
    top: 0;
    z-index: 100;
    width: 100%;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.nav {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--brand-dark);
    letter-spacing: -0.5px;
}

.logo span {
    color: var(--brand-orange);
}

.nav-links {
    display: flex;
    gap: 80px;
    list-style: none;
    font-size: 18px;
}

.nav-links a {
    text-decoration: none;
    color: #fff;
    transition: color .2s;
}

.nav-links a:hover {
    color: var(--brand-orange);
}

section {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 0 300px;
}

section.pb100 {
    padding-bottom: 100px;
}

.section-title {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 60px;
    color: #000;
}

.hero {
    max-width: 100%;
    padding: 0;
}

.cta-section {
    text-align: center;
}

.cta-btn {
    display: inline-block;
    background: linear-gradient(90deg, #ff7a45, #ff5e2c);
    color: #fff;
    padding: 16px 50px;
    border-radius: 30px;
    font-size: 42px;
    font-weight: 400;
    text-decoration: none;
    box-shadow: 0 8px 24px rgba(255, 94, 44, 0.35);
    margin: 60px 0 200px;
    transition: transform .2s, box-shadow .2s;
}

.cta-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 28px rgba(255, 94, 44, 0.45);
}

.cta-title {
    font-size: 52px;
    color: #000;
    line-height: 72px;
}

.cta-subtitle {
    font-size: 52px;
    line-height: 72px;
    font-weight: 700;
    color: #000;
    position: relative;
    display: inline-block;
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
    margin: 0 auto;
    padding-top: 100px;
}

.service-card {
    background: #fff;
    border-radius: 20px;
    padding: 28px 16px;
    transition: transform .2s, box-shadow .2s;
    text-align: center;
    position: relative;
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.08);
}

.service-card:not(:last-child)::after {
    content: "";
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 1px;
    height: 60%;
    background: #e5e5e5;
}

.service-icon {
    width: 100px;
    height: 100px;
    margin: 0 auto 16px;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.service-card:nth-child(1) .service-icon {
    background: #ffefea;
}

.service-card:nth-child(2) .service-icon {
    background: #eaf4fe;
}

.service-card:nth-child(3) .service-icon {
    background: #ecf9f2;
}

.service-card:nth-child(4) .service-icon {
    background: #fffae5;
}

.service-label {
    font-size: 28px;
    font-weight: 500;
    color: #000;
}

.why-section {
    display: grid;
    grid-template-columns: 1fr 1.1fr;
    gap: 48px;
    padding-bottom: 30px;
}

.why-title {
    font-size: 52px;
    line-height: 72px;
    color: #000;
}

.why-headline {
    font-size: 52px;
    font-weight: 700;
    line-height: 72px;
    color: #000;
    position: relative;
}

.why-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    padding-top: 80px;
}

.why-stat .num {
    font-size: 80px;
    font-weight: 500;
    line-height: 1;
}

.why-stat .num small {
    font-size: 32px;
    font-weight: 500;
    margin-left: 2px;
}

.why-stat .label {
    color: #000;
    margin-top: 6px;
    font-size: 24px;
}

.why-stat {
    padding: 50px;
}

.why-stat:nth-child(1),
.why-stat:nth-child(3) {
    border-right: 1px solid #e5e5e5;
    padding-left: 0;
}

.why-stat:nth-child(1),
.why-stat:nth-child(2) {
    border-bottom: 1px solid #e5e5e5;
}

.why-stat:nth-child(1) .num {
    color: var(--brand-orange);
}

.why-stat:nth-child(2) .num {
    color: var(--blue);
}

.why-stat:nth-child(3) .num {
    color: var(--green);
}

.why-stat:nth-child(4) .num {
    color: var(--gold);
}

.cert-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 50px;
}

.cert-card {
    background: #fff;
    border-radius: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
}

.cert-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
}

.cert-logo {
    height: 140px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    background: #f8f8fa;
    padding: 40px 0;
    border-radius: 20px 20px 0 0;
}

.cert-name {
    font-size: 18px;
    color: #000;
    text-align: center;
    padding: 20px 0;
    font-weight: 300;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 80px;
    line-height: 1.4;
}

.award-grid {
    display: grid;
    grid-template-columns: repeat(2, 0.5fr) repeat(2, 1fr);
    gap: 20px;
}

.award-card {
    background: #fff;
    border-radius: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
}

.award-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
}

.award-icon {
    height: 140px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    background: #f8f8fa;
    padding: 40px 0;
    border-radius: 20px 20px 0 0;
}

.award-name {
    font-size: 18px;
    color: #000;
    text-align: center;
    padding: 20px 0;
    font-weight: 300;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 80px;
    line-height: 1.4;
}

.clients-section {
    max-width: 1200px;
    background: linear-gradient(180deg, #fff6f3 0%, #ff875f 100%);
    border-radius: 0 200px;
    text-align: center;
    padding: 120px 0;
}

.clients-title {
    font-size: 52px;
    font-weight: 400 !important;
    color: #000;
    margin-bottom: 0;
    position: relative;
    display: inline-block;
}

.clients-title b {
    font-weight: 700 !important;
}

.clients-grid {
    max-width: 1000px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
    margin-top: 90px;
}

.client-card {
    background: #fff;
    border-radius: 20px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    transition: transform .2s;
    height: 108px;
}

.client-card:hover {
    transform: translateY(-4px);
}

.client-card.dark {
    background: #6b292d;
    color: #fff;
}

.client-card.brown {
    background: #c35f32;
    color: #fff;
}

.case-study {
    display: grid;
    grid-template-columns: 1fr 1fr;
    margin-bottom: 200px;
    gap: 100px;
}

.case-study:last-child {
    margin-bottom: 0;
}

.case-tag {
    display: inline-block;
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 2dvh;
}

.case-tag.orange {
    color: var(--brand-orange);
}

.case-tag.blue {
    color: var(--blue);
}

.case-tag.green {
    color: var(--green);
}

.case-tag.gold {
    color: var(--gold);
}

.case-tag.red {
    color: #ff2442;
}

.case-title {
    font-size: 52px;
    font-weight: 700;
    color: #000;
    margin-bottom: 70px;
}

.case-metrics {
    margin-bottom: 22px;
}

.case-metric {
    font-size: 24px;
    color: #000;
    line-height: 58px;
}

.case-metric strong {
    font-size: 42px;
    font-weight: 500;
}

.case-metric.orange strong {
    color: var(--brand-orange);
}

.case-metric.blue strong {
    color: var(--blue);
}

.case-metric.green strong {
    color: var(--green);
}

.case-metric.gold strong {
    color: var(--gold);
}

.case-metric.red strong {
    color: #ff2442;
}

.case-desc {
    color: #000;
    font-size: 24px;
    line-height: 34px;
}

.case-phones {
    position: relative;
    min-height: 460px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.process-section {
    text-align: center;
    padding-top: 300px;
}

.process-heading {
    font-size: 52px;
    font-weight: 400;
    color: #000;
    line-height: 72px;
}

.process-subheading {
    font-size: 52px;
    font-weight: 700;
    color: #000;
    margin-bottom: 8px;
    line-height: 72px;
}

.process-cards {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 16px;
    margin: 80px 0;
}

.process-card {
    color: #fff;
    border-radius: 0 60px;
    padding: 32px 18px 24px;
    text-align: left;
    position: relative;
    min-height: 180px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: transform .2s, box-shadow .2s;
}

.process-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 16px 32px rgba(0, 0, 0, 0.12);
}

.process-card:nth-child(1) {
    background: #ff6633;
}

.process-card:nth-child(2) {
    background: #3496f9;
}

.process-card:nth-child(3) {
    background: #44c883;
}

.process-card:nth-child(4) {
    background: #ffd100;
}

.process-card:nth-child(5) {
    background: #ff2442;
}

.process-card-title {
    font-size: 24px;
    font-weight: 700;
    text-align: center;
    display: flex;
    justify-content: center;
    align-items: start;
    height: 69px;
    margin-top: 20px;
}

.process-arrows {
    position: absolute;
    bottom: 10px;
    right: 10px;
}

.process-footer {
    color: #000;
    font-size: 24px;
    line-height: 48px;
    margin: 0 auto;
    display: inline-block;
}

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

.wavy-line {
    display: block;
    width: 100%;
    height: 6px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 40 8'%3E%3Cpath d='M0 4 Q 10 0, 20 4 T 40 4' fill='none' stroke='%23ff6633' stroke-width='5' stroke-linecap='round'/%3E%3C/svg%3E");
    background-repeat: repeat-x;
    background-size: 20px 6px;
    margin-top: 6px;
}

.contact-wrap {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: 20px;
    align-items: start;
    max-width: 1200px;
    margin: 0 auto;
}

.contact-info h2 {
    font-size: 50px;
    margin-bottom: 60px;
    color: #000000;
    font-weight: 400;
    line-height: 72px;
}

.contact-info h2 b {
    font-weight: 700;
}

.contact-info p {
    color: #000000;
    line-height: 48px;
    font-size: 25px;
}

.highlight-text {
    position: relative;
    display: inline-block;
    font-weight: 700;
}

.highlight-text svg {
    position: absolute;
    bottom: -20px;
    right: -10px;
    width: 250px;
    height: 50px;
    overflow: visible;
    display: block;
}

.clients-section .highlight-text svg {
    right: none;
    left: 0;
}

.why-section .highlight-text svg {
    right: none;
    left: 50px;
    width: 220px;
}

.highlight-text svg path {
    fill: none;
    stroke: var(--brand-orange);
    stroke-width: 14;
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-dasharray: 520px;
    stroke-dashoffset: 520px;
}

.highlight-text.animated svg path {
    animation: drawUnderline 6.4s ease-in-out infinite;
}

@keyframes drawUnderline {
    0% {
        stroke-dashoffset: 520px;
    }

    18% {
        stroke-dashoffset: 0px;
    }

    18.1%,
    84% {
        stroke-dashoffset: 0px;
    }

    92% {
        stroke-dashoffset: 520px;
    }

    100% {
        stroke-dashoffset: 520px;
    }
}

.form {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.form input,
.form select,
.form textarea {
    width: 100%;
    padding: 20px 37px;
    border: 1px solid #eeeeee;
    border-radius: 34px;
    font-family: inherit;
    background: #fbfbfb;
    transition: border-color 0.3s, box-shadow 0.3s;
    font-size: 22px;
}

.form input::placeholder,
.form select::placeholder,
.form textarea::placeholder {
    color: #cccccc;
}

.form input:focus,
.form select:focus,
.form textarea:focus {
    outline: none;
    border-color: var(--brand-orange);
    box-shadow: 0 0 0 3px rgba(241, 90, 36, 0.12);
}

.form textarea {
    min-height: 120px;
    resize: vertical;
}

.form select {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='10' viewBox='0 0 14 10'%3E%3Cpath d='M7 10L0 0L14 0L7 10Z' fill='%23888'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 18px center;
    background-size: 14px 10px;
    padding-right: 48px;
    cursor: pointer;
}

.form select:focus {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='10' viewBox='0 0 14 10'%3E%3Cpath d='M7 10L0 0L14 0L7 10Z' fill='%23f15a24'/%3E%3C/svg%3E");
}

.form select:hover {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='10' viewBox='0 0 14 10'%3E%3Cpath d='M7 10L0 0L14 0L7 10Z' fill='%23f15a24'/%3E%3C/svg%3E");
}

.form select::-ms-expand {
    display: none;
}

.form button {
    background: var(--brand-orange);
    color: #fff;
    border: none;
    padding: 16px;
    border-radius: 34px;
    font-size: 25px;
    font-weight: 700;
    cursor: pointer;
    transition: opacity 0.2s, transform 0.2s;
    margin-top: 25px;
}

.form button:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

.form button:active {
    transform: scale(0.98);
}

.consent {
    font-size: 12px;
    color: #000;
    display: flex;
    gap: 10px;
    align-items: flex-start;
    line-height: 24px;
    cursor: pointer;
}

.consent input[type="checkbox"] {
   /* display: none;*/
   display: inline-block;
    width: 15px;
    height: 15px;
    margin-top: 3px;
}

.consent .checkmark {
    display: inline-block;
    width: 20px;
    height: 20px;
    min-width: 20px;
    border: 2px solid #ccc;
    border-radius: 50%;
    background: #fff;
    position: relative;
    transition: all 0.3s ease;
    margin-top: 1px;
    flex-shrink: 0;
}

.consent:hover .checkmark {
    border-color: var(--brand-orange);
}

.consent input[type="checkbox"]:checked+.checkmark {
    background: var(--brand-orange);
    border-color: var(--brand-orange);
}

.consent input[type="checkbox"]:checked+.checkmark::after {
    content: "";
    position: absolute;
    left: 5px;
    top: 2px;
    width: 6px;
    height: 10px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.consent input[type="checkbox"]:focus+.checkmark {
    box-shadow: 0 0 0 3px rgba(241, 90, 36, 0.25);
    border-color: var(--brand-orange);
}

.consent span {
    user-select: none;
}

footer {
    background: url(img/f-bg.png) var(--brand-dark);
    color: #f8f8fa;
}

.footer-inner {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 5fr 2fr 4fr;
    gap: 0;
    padding: 200px 0;
}

.footer-inner p {
    font-size: 18px;
}

.footer-brand {
    color: #fff;
    font-weight: 700;
    font-size: 25px;
    margin-bottom: 50px;
}

.footer-links {
    list-style: none;
}

.footer-links a {
    font-size: 15px;
    text-decoration: none;
    color: #f8f8fa;
    line-height: 38px;
}

.footer-links a:hover {
    color: #fff;
}

.footer-contact p {
    font-size: 15px;
    line-height: 38px;
}
.footer-contact a{
    color: #f8f8fa;
    text-decoration: none; 
}
.footer-contact p img {
    float: left;
    margin: 12px 10px 0 0;
}

.footer-bottom {
    background-color: #1a1a1a;
    height: 120px;
    text-align: center;
    justify-content: center;
    align-items: center;
    display: flex;
    font-size: 15px;
}

/* ==========================================
   汉堡菜单样式
   ========================================== */

.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 22px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 200;
    transition: all 0.3s ease;
}

.menu-toggle .bar {
    display: block;
    width: 100%;
    height: 3px;
    background: #fff;
    border-radius: 2px;
    transition: all 0.3s ease;
    transform-origin: center;
}

.menu-toggle:hover .bar {
    background: #fff;
}

.menu-toggle.active .bar:nth-child(1) {
    transform: translateY(9.5px) rotate(45deg);
}

.menu-toggle.active .bar:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.menu-toggle.active .bar:nth-child(3) {
    transform: translateY(-9.5px) rotate(-45deg);
}

/* ==========================================
   响应式设计
   ========================================== */

@media (max-width: 1024px) {
    .nav-links {
        gap: 40px;
        font-size: 16px;
    }

    .cta-btn {
        font-size: 30px;
        padding: 14px 28px;
        margin: 60px 0 120px;
    }

    .cta-title,
    .cta-subtitle {
        font-size: 38px;
        line-height: 54px;
    }

    .service-grid {
        grid-template-columns: repeat(2, 1fr);
        padding-top: 60px;
    }

    .service-card:not(:last-child)::after {
        display: none;
    }

    .service-card:nth-child(2)::after {
        content: "";
        position: absolute;
        right: 0;
        top: 50%;
        transform: translateY(-50%);
        width: 1px;
        height: 60%;
        background: #e5e5e5;
    }

    .why-section {
        grid-template-columns: 1fr;
        gap: 30px;
        padding-bottom: 60px;
    }

    .why-title,
    .why-headline {
        font-size: 38px;
        line-height: 54px;
    }

    .why-stats {
        padding-top: 40px;
    }

    .why-stat {
        padding: 30px 20px;
    }

    .why-stat .num {
        font-size: 56px;
    }

    .why-stat .num small {
        font-size: 24px;
    }

    .why-stat .label {
        font-size: 20px;
    }

    .cert-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
    }

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

    .clients-title {
        font-size: 38px;
    }

    .clients-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 14px;
        margin-top: 50px;
    }

    .client-card {
        height: 90px;
    }

    .case-study {
        grid-template-columns: 1fr;
        gap: 40px;
        margin-bottom: 100px;
    }

    .case-study.reverse .case-phones {
        order: 1;
    }

    .case-study.reverse .case-text {
        order: 2;
    }

    .case-title {
        font-size: 38px;
        margin-bottom: 30px;
    }

    .case-metric {
        font-size: 20px;
        line-height: 44px;
    }

    .case-metric strong {
        font-size: 32px;
    }

    .case-desc {
        font-size: 20px;
        line-height: 30px;
    }

    .case-phones {
        min-height: 300px;
    }

    .case-phones img {
        max-width: 80%;
    }

    .process-section {
        padding-top: 150px;
    }

    .process-heading,
    .process-subheading {
        font-size: 38px;
        line-height: 54px;
    }

    .process-cards {
        grid-template-columns: repeat(3, 1fr);
        gap: 14px;
        margin: 50px 0;
    }

    .process-card {
        min-height: 150px;
        padding: 24px 14px 18px;
        border-radius: 0 40px;
    }

    .process-card-title {
        font-size: 20px;
        height: 56px;
    }

    .process-arrows img {
        max-width: 60px;
    }

    .process-footer {
        font-size: 20px;
        line-height: 38px;
    }

    .contact-wrap {
        grid-template-columns: 1fr;
        gap: 40px;
        padding: 0 20px;
    }

    .contact-info h2 {
        font-size: 38px;
        line-height: 54px;
        margin-bottom: 30px;
    }

    .contact-info p {
        font-size: 20px;
        line-height: 36px;
    }

    .form input,
    .form select,
    .form textarea {
        font-size: 18px;
        padding: 16px 24px;
    }

    .form button {
        font-size: 20px;
        padding: 14px;
    }

    .footer-inner {
        grid-template-columns: 1fr 1fr;
        gap: 40px;
        padding: 100px 24px;
    }

    .highlight-text svg {
        width: 180px;
        height: 40px;
    }

    .why-section .highlight-text svg {
        width: 180px;
        left: 20px;
    }

    .clients-section .highlight-text svg {
        width: 180px;
    }

    .clients-section {
        padding: 80px 24px;
        border-radius: 0 100px;
    }

    section {
        padding: 0 20px 150px;
    }

    section.pb100 {
        padding-bottom: 60px;
    }

    .section-title {
        font-size: 24px;
        margin-bottom: 40px;
    }
}

@media (max-width: 768px) {

    /* 显示汉堡菜单按钮 */
    .menu-toggle {
        display: flex;
        flex-shrink: 0;
    }


    /* 导航链接 - 移动端下拉菜单 */
    .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        align-items: center;
        gap: 0;
        padding: 0;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.4s ease, padding 0.3s ease, box-shadow 0.3s ease;
        box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
        border-radius: 0 0 16px 16px;
        width: 100%;
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
        display: flex;
    }

    .nav-links.active {
        max-height: 500px;
        padding: 16px 0;
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
    }

    .nav-links li {
        width: 100%;
        text-align: center;
        border-bottom: 1px solid #f0f0f0;
    }

    .nav-links li:last-child {
        border-bottom: none;
    }

    .nav-links a {
        display: block;
        padding: 14px 20px;
        color: var(--brand-dark) !important;
        font-size: 16px;
        font-weight: 500;
        transition: background 0.2s, color 0.2s;
    }

    .nav-links a:hover {
        background: #f5f5f5;
        color: var(--brand-orange) !important;
    }

    header {
        position: relative;
        background: var(--brand-orange);
        box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
    }

    .nav {
        padding: 12px 16px;
        position: relative;
        justify-content: space-between;
    }

    .logo {
        margin: 0;
        flex-shrink: 0;
    }

    .logo img {
        max-height: 40px;
    }

    .hero {
        padding-top: 0;
    }

    .hero img {
        width: 100%;
        height: auto;
    }

    .cta-btn {
        font-size: 20px;
        padding: 12px 20px;
        margin: 40px 0 60px;
        border-radius: 20px;
        box-shadow: 0 6px 18px rgba(255, 94, 44, 0.3);
    }

    .cta-title,
    .cta-subtitle {
        font-size: 28px;
        line-height: 40px;
    }

    .service-grid {
        grid-template-columns: 1fr 1fr;
        padding-top: 40px;
        gap: 12px;
    }

    .service-card {
        padding: 20px 12px;
        border-radius: 14px;
    }

    .service-card:nth-child(2)::after {
        display: none;
    }

    .service-icon {
        width: 70px;
        height: 70px;
        margin-bottom: 10px;
    }

    .service-icon img {
        max-width: 40px;
    }

    .service-label {
        font-size: 18px;
    }

    .why-title,
    .why-headline {
        font-size: 28px;
        line-height: 40px;
    }

    .why-stats {
        grid-template-columns: 1fr 1fr;
        padding-top: 20px;
    }

    .why-stat {
        padding: 20px 12px;
    }

    .why-stat .num {
        font-size: 40px;
    }

    .why-stat .num small {
        font-size: 18px;
    }

    .why-stat .label {
        font-size: 16px;
        margin-top: 4px;
    }

    .why-stat:nth-child(1),
    .why-stat:nth-child(3) {
        border-right: 1px solid #e5e5e5;
        padding-left: 0;
    }

    .why-stat:nth-child(1),
    .why-stat:nth-child(2) {
        border-bottom: 1px solid #e5e5e5;
    }

    .why-visual img {
        max-width: 100%;
    }

    .cert-grid {
        grid-template-columns: 1fr 1fr;
        gap: 16px;
    }

    .cert-logo {
        height: 100px;
        padding: 20px 0;
    }

    .cert-logo img {
        max-height: 50px;
        max-width: 80%;
    }

    .cert-name {
        font-size: 14px;
        min-height: 60px;
        padding: 14px 8px;
    }

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

    .award-icon {
        height: 100px;
        padding: 20px 0;
    }

    .award-icon img {
        max-height: 50px;
        max-width: 80%;
    }

    .award-name {
        font-size: 13px;
        min-height: 56px;
        padding: 14px 8px;
    }

    .clients-section {
        padding: 50px 16px;
        border-radius: 0 60px;
    }

    .clients-title {
        font-size: 26px;
    }

    .clients-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
        margin-top: 30px;
    }

    .client-card {
        height: 70px;
        border-radius: 14px;
        padding: 8px;
    }

    .client-card img {
        max-height: 36px;
        max-width: 80%;
    }

    .case-study {
        gap: 24px;
        margin-bottom: 60px;
    }

    .case-tag {
        font-size: 18px;
        margin-bottom: 4px;
    }

    .case-title {
        font-size: 28px;
        margin-bottom: 20px;
    }

    .case-metric {
        font-size: 17px;
        line-height: 34px;
    }

    .case-metric strong {
        font-size: 24px;
    }

    .case-desc {
        font-size: 16px;
        line-height: 26px;
    }

    .case-phones {
        min-height: 200px;
    }

    .case-phones img {
        max-width: 90%;
    }

    .process-section {
        padding-top: 80px;
    }

    .process-heading,
    .process-subheading {
        font-size: 25px;
        line-height: 38px;
    }

    .process-cards {
        grid-template-columns: 1fr 1fr;
        gap: 10px;
        margin: 30px 0;
    }

    .process-card {
        min-height: 120px;
        padding: 18px 12px 14px;
        border-radius: 0 30px;
    }

    .process-card-title {
        font-size: 16px;
        height: 44px;
        margin-top: 10px;
    }

    .process-icon img {
        max-width: 44px;
    }

    .process-arrows img {
        max-width: 40px;
    }

    .process-footer {
        font-size: 16px;
        line-height: 30px;
    }

    .contact-wrap {
        padding: 0 12px;
        gap: 30px;
    }

    .contact-info h2 {
        font-size: 28px;
        line-height: 40px;
        margin-bottom: 20px;
    }

    .contact-info p {
        font-size: 16px;
        line-height: 30px;
    }

    .form {
        gap: 16px;
    }

    .form input,
    .form select,
    .form textarea {
        font-size: 16px;
        padding: 14px 18px;
        border-radius: 24px;
    }

    .form textarea {
        min-height: 80px;
    }

    .form button {
        font-size: 18px;
        padding: 12px;
        border-radius: 24px;
        margin-top: 16px;
    }

    .consent {
        font-size: 11px;
        line-height: 20px;
        gap: 8px;
    }

    .consent .checkmark {
        width: 18px;
        height: 18px;
        min-width: 18px;
        margin-top: 0;
    }

    .consent input[type="checkbox"]:checked+.checkmark::after {
        left: 4px;
        top: 1px;
        width: 6px;
        height: 10px;
    }

    .highlight-text svg {
        width: 140px;
        height: 32px;
        bottom: -14px;
        right: 40px;
    }

    .why-section .highlight-text svg {
        width: 150px;
        left: 10px;
    }

    .clients-section .highlight-text svg {
        width: 140px;
    }

    .footer-inner {
        grid-template-columns: 1fr;
        gap: 30px;
        padding: 60px 16px;
    }

    .footer-brand {
        font-size: 20px;
        margin-bottom: 20px;
    }

    .footer-inner p {
        font-size: 15px;
    }

    .footer-links a,
    .footer-contact p {
        font-size: 14px;
        line-height: 32px;
    }

    .footer-contact p img {
        margin: 8px 10px 0 0;
        max-width: 18px;
    }

    .footer-bottom {
        height: 80px;
        font-size: 12px;
        padding: 0 16px;
    }

    section {
        padding: 0 12px 100px;
    }

    section.pb100 {
        padding-bottom: 40px;
    }

    .section-title {
        font-size: 20px;
        margin-bottom: 30px;
    }
}




/* ----- 共享容器 (让两个按钮堆叠，电话在上) ----- */
.float-group {
    position: fixed;
    bottom: 96px;
    /* 距离底部 96px，两个按钮整体从底部往上排列 */
    right: 32px;
    display: flex;
    flex-direction: column-reverse;
    /* 让电话按钮在 WhatsApp 上方 (视觉上) */
    align-items: center;
    gap: 16px;
    /* 两个按钮间距 */
    z-index: 900;
    pointer-events: none;
    /* 容器本身不拦截点击，内部按钮可点击 */
}

/* 每个悬浮按钮 (a 标签) */
.float-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    border: none;
    text-decoration: none;
    /* 去除下划线 */
    cursor: pointer;
    pointer-events: auto;
    /* 恢复点击 */
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: opacity 0.3s cubic-bezier(0.2, 0.9, 0.3, 1.1),
        transform 0.35s cubic-bezier(0.2, 0.9, 0.3, 1.1),
        box-shadow 0.25s ease,
        background 0.2s ease;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
    color: #fff;
    fill: currentColor;
    will-change: transform, opacity;
}

/* 两个按钮同时显示 —— 通过 JS 或 父级类 控制，这里用 .visible 类 */
.float-btn.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* ----- 电话按钮 (红色) 专属 ----- */
.float-btn.call-btn {
    background: #E53935;
    /* 醒目红色 */
    box-shadow: 0 4px 18px rgba(229, 57, 53, 0.45);
}

.float-btn.call-btn:hover {
    background: #c62828;
    /* 加深红 */
    transform: translateY(-4px) scale(1.05);
    box-shadow: 0 8px 28px rgba(229, 57, 53, 0.55);
}

.float-btn.call-btn svg {
    width: 28px;
    height: 28px;
    fill: currentColor;
}

.float-btn.call-btn i {
    font-size: 28px;
}


/* ----- WhatsApp 按钮 (绿色) 继承原有设计 ----- */
.float-btn.whatsapp-btn {
    background: #25D366;
    box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4);
}

.float-btn.whatsapp-btn:hover {
    background: #20b858;
    transform: translateY(-4px) scale(1.05);
    box-shadow: 0 8px 30px rgba(37, 211, 102, 0.6);
}

.float-btn.whatsapp-btn svg {
    width: 34px;
    height: 34px;
    fill: currentColor;
}

.float-btn.whatsapp-btn i {
    font-size: 34px;
}

 /* ----- 回到顶部按钮 (深灰/蓝) ----- */
        .float-btn.top-btn {
            background: #c62828;
            box-shadow: 0 4px 16px rgba(44, 62, 80, 0.35);
        }
        .float-btn.top-btn:hover {
            background: #c62828;
            transform: translateY(-4px) scale(1.05);
            box-shadow: 0 8px 24px rgba(44, 62, 80, 0.5);
        }
        .float-btn.top-btn svg {
            width: 30px;
            height: 30px;
            fill: none;
            stroke: currentColor;
            stroke-width: 2.5;
            stroke-linecap: round;
            stroke-linejoin: round;
        }
        

        /* 顶部时隐藏，用额外类控制 */
        .float-btn.top-btn.at-top {
            opacity: 0;
            visibility: hidden;
            pointer-events: none;
            transform: translateY(12px);
        }
@media (max-width: 768px) {
    
.float-group {
    left: 32px;
    right: auto;
}
.float-btn {
    width: 50px;
    height: 50px;
}
}