:root {
    --p4-radius: 20px;
    --aiv-color:#0060FF;
    --aiv-radius:10px;
    --aiv-color-red:#FF5053;
    --aiv-gap:36px;
}

body {
    font-family: "HarmonyOS Sans", Arial, sans-serif;
    margin: 0;
    padding: 0;
    overflow-x: hidden;
}

h2,
h3 {
    margin-top: 0px;
}

.lp-container {
    max-width: 1300px;
    margin: 0 auto;
    box-sizing: border-box;
    padding: 100px 0px;
}

.h-full {
    height: 100%;
}

button:focus,
.btn:focus,
.btn:active {
    outline: none !important;
    box-shadow: none !important;
}

.logo {
    width: 158px;
    height: 46px;
    margin: 1px 0;
}

.main-card {
    background-color: #ffffff;
    border-radius: 24px;
    padding: 30px 0px;
    box-shadow: 0px 8px 32px rgba(0, 140, 149, 0.08);
    height: 100%;
    position: relative;
    border: 1px solid #e8f5f4;
}

.main-text {
    color: #0060FF;
}

/* header AIVON */
.header-aivon {
    background-color: #EFF5FF;
    padding: 13px 0;
    /* height: 75px; */
}

.header-aivon h1 {
    color: #0060FF;
    font-size: 24px;
    font-weight: 700;
    text-align: start;
}

/* Hero Section */
.hero-section {
    /* background: linear-gradient(135deg, #48CACA 0%, #019099 100%); */
    background-image: url("/aivon/static/img/activity/invite/aiv-lp4-bg.webp");
    background-size: cover;
    position: relative;
    /* background-position: center; */
    background-repeat: no-repeat;
    height: 780px;
}

.hero-section::before {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    background-color: #77AAFF;
    width: 100%;
    height: 2px;
}

.hero-bg-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 12, 11, 0.54);
}

.hero-bg-pattern {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-size: cover;
    background-position: center;
    opacity: 0.2;
    filter: blur(2px);
}

.hero-content {
    position: relative;
    z-index: 10;
    color: white;
    text-align: left;
    padding-top: 170px;
}

.hero-title {
    font-size: 52px;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 5px;
    /* text-shadow: 0px 4px 4px rgba(0, 23, 23, 0.29); */
    font-family: 'HarmonyOS Sans';
    font-style: normal;
    font-weight: 700;
    font-size: 42px;
    line-height: 58px;
    color: #02033B;
}

.hero-subtitle {
    font-size: 20px;
    font-weight: 500;
    line-height: 2em;
    margin-bottom: 80px;
    margin-top: 10px;
    /* max-width: 580px; */
    font-family: 'HarmonyOS Sans';
    font-style: normal;
    font-weight: 400;
    font-size: 24px;
    line-height: 34px;
    /* or 142% */
    color: #606060;

}

/* .active-container{
        background: rgba(0, 111, 117, 0.2);
        border: 1px solid #FFFFFF;
        box-shadow: 0px 1px 19.3px rgba(50, 80, 83, 0.15);
        border-radius: 9px;
        min-height: 180px;
        max-width: 580px;
    } */
.btn-signup {
    /* background: radial-gradient(circle,#0060FF 0%, #0099a3 100%); */
    background-color: #0060FF;
    width: 234px;
    height: 80px;
    font-size: 24px;
    border: 3px solid #ffffff;
    box-shadow: 0px 4px 11.4px rgba(52, 74, 77, 0.25);
    color: white;
    font-size: 24px;
    font-weight: 900;
    padding: 20px 30px;
    border-radius: 16px;
    text-transform: none;
    margin-top: 20px;
}

.btn-signup {
    transition: all 0.3s ease;
}

/* Features Section */
.features-section {
    padding: 40px 0 20px 0;
    position: relative;
    z-index: 5;
}

.features-section .row {
    display: flex;
    align-items: stretch;
}

.features-section .row>[class*="col-"] {
    display: flex;
}

.feature-title {
    font-size: 32px;
    font-weight: 700;
    color: #2b2b2b;
    text-align: center;
    margin-bottom: 60px;
}

.feature-card {
    background: #0060FF;
    padding: 20px 20px;
    text-align: center;
    color: white;
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    box-sizing: border-box;
    background: #FFFFFF;
    border: 1px solid #AFCDFF;
    /* 专题页投影 */
    box-shadow: 6px 10px 20px rgba(5, 12, 22, 0.1);
    border-radius: 20px;

}

/* .feature-card::after {
        content: "";
        position: absolute;
        top: 4px;
        left: -4px;
        width: 100%;
        height: 100%;
        z-index: -1;
        background:#0060FF;
        box-shadow: 0px 4px 20px rgba(180, 204, 199, 0.19);
        border-radius: 30px;
    } */
/*.bg_card {
    background-color:#0060FF;
    border-radius: 30px;
    box-shadow: 0px 4px 20px rgba(180, 204, 199, 0.19);
}*/
.feature-card-outline {
    background: white;
    border: 1px solid #AFCDFF;
    box-shadow: 6px 10px 20px rgba(5, 12, 22, 0.1);
    border-radius: 20px;
    color: #32383a;
    width: 400px;
    height: 285px;
    color: #37393F;
}

.features-row {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: nowrap;
    gap: var(--aiv-gap,36px);
}

.feature-card h3 {
    font-size: 24px;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 15px;
    flex: 0 0 auto;
}

.feature-card p {
    font-size: 16px;
    font-weight: 400;
    line-height: 1.5;
    margin-bottom: 0;
    flex: 1;
    margin-top: 20px;
    overflow: hidden;
    text-overflow: ellipsis;
}

.feature-icon {
    width: 84px;
    height: 84px;
    margin: 0 auto 0px;
    margin-top: 20px;
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
    flex-shrink: 0;
}

.feature-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 10px 0;
}

.feature-content h3 {
    margin: 0;
}

/* CTA Button Section */
.cta-button-section {
    text-align: center;
    margin: 40px 0;
    margin-top: 20px;
}

.btn-start-prototype {
    /* Rectangle 34624674 */
    width: 230px;
    height: 60px;
    box-sizing: border-box;
    background: #0060FF;
    /*    border: 1px solid #000000;*/
    box-shadow: 0px 4px 4px rgba(0, 0, 0, 0.15);
    border-radius: 12px;
    color: white;
    font-size: 18px;
    font-weight: 700;
    padding: 18px 60px;
}

.btn-start-prototype:hover {
    background: #007c83;
    color: white;
    transform: translateY(-2px);
}

.btn-start-prototype:focus {
    background: #007c83;
    color: white;
    outline: none;
    box-shadow: 0px 4px 4px rgba(0, 0, 0, 0.15);
}

.btn-start-prototype:active {
    background: #006c73;
    color: white;
    outline: none;
    transform: translateY(0px);
}

.btn-start-prototype {
    transition: all 0.3s ease;
}

.cta-text {
    margin-bottom: 10px;
    font-family: "HarmonyOS Sans";
    font-weight: 700;
    font-size: 18px;
    line-height: 21px;
    color: #0060FF;
}

/* How it Works Section */
.how-it-works {
    position: relative;
}

.section-title {
    font-size: 32px;
    font-weight: 700;
    color: #1a2b2e;
    text-align: center;
    margin-top: 20px;
}

.step-container {
    margin-bottom: 0px;
    padding: 0px 40px;
    position: relative;
}

.step-container:last-child {
    margin-bottom: 0;
}

.border-line {
    width: 100%;
    height: 10px;
    margin: 10px 0;
    background-image: url("/aivon/static/img/activity/invite/border_line.png");
    background-size: 100% 100%;
    background-position: center;
    background-repeat: no-repeat;
}

.step-card {
    /* background: white; */
    /* border-radius: 24px; */
    padding: 50px 40px;
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    /* box-shadow: 0px 8px 32px rgba(0, 140, 149, 0.08); */
    height: 370px;
    position: relative;
}

.step-number {
    color: #0060FF;
    font-size: 20px;
    font-weight: 700;
    padding: 0px 20px;
    position: relative;
}

.step-number::before {
    content: "";
    position: absolute;
    left: 0;
    top: 10%;
    width: 4px;
    height: 80%;
    background-color: #f3835a;
}

.step-title {
    font-size: 28px;
    font-weight: 700;
    color: #1a2b2e;
    margin-bottom: 20px;
    line-height: 1.3;
}

.step-description {
    color: #000000;
    font-family: "HarmonyOS Sans";
    font-style: normal;
    font-weight: 400;
    font-size: 16px;
    line-height: 30px;
    color: #000000;
}

.step-visual {
    background: linear-gradient(135deg, #e8f5f4 0%, #d4efed 100%);
    border-radius: 24px;
    padding: 40px;
    height: 280px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    border: 1px solid #c4e8e6;
    overflow: hidden;
}

.step-visual::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(0, 140, 149, 0.02) 0%, rgba(0, 140, 149, 0.08) 100%);
    border-radius: 24px;
}

.step-visual:hover .monitor {
    transform: translateY(-2px);
    transition: transform 0.3s ease;
}

.step-visual:hover .laptop {
    transform: translateY(-2px);
    transition: transform 0.3s ease;
}

.step-visual:hover .package {
    transform: translateY(-2px) rotate(5deg);
    transition: transform 0.3s ease;
}

.step-visual:hover .globe {
    transform: rotate(10deg);
    transition: transform 0.3s ease;
}

.step-illustration {
    position: relative;
    z-index: 2;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Step 1 - Computer Monitor */
.step-1-illustration {
    position: relative;
}

.monitor {
    width: 120px;
    height: 80px;
    background: #2c3e50;
    border-radius: 8px;
    position: relative;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.monitor::after {
    content: "";
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 15px;
    background: #34495e;
    border-radius: 0 0 8px 8px;
}

.monitor-screen {
    position: absolute;
    top: 8px;
    left: 8px;
    right: 8px;
    bottom: 8px;
    background: #0060FF;
    border-radius: 4px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 10px;
    font-weight: 700;
}

/* Step 2 - Laptop with Pricing */
.step-2-illustration {
    position: relative;
}

.laptop {
    width: 140px;
    height: 90px;
    background: #34495e;
    border-radius: 8px 8px 0 0;
    position: relative;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.laptop::after {
    content: "";
    position: absolute;
    bottom: -8px;
    left: -10px;
    width: 160px;
    height: 8px;
    background: #2c3e50;
    border-radius: 0 0 12px 12px;
}

.laptop-screen {
    position: absolute;
    top: 8px;
    left: 8px;
    right: 8px;
    bottom: 15px;
    background: white;
    border-radius: 4px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    color: #2c3e50;
    font-weight: 700;
}

.price-highlight {
    background: #0060FF;
    color: white;
    padding: 4px 8px;
    border-radius: 12px;
    font-size: 12px;
    margin: 2px 0;
}

/* Step 3 - Delivery Package */
.step-3-illustration {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.package {
    width: 60px;
    height: 60px;
    background: #f39c12;
    border-radius: 8px;
    position: relative;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    margin-right: 20px;
}

.package::before {
    content: "";
    position: absolute;
    top: 15px;
    left: 15px;
    right: 15px;
    height: 2px;
    background: #e67e22;
}

.package::after {
    content: "";
    position: absolute;
    top: 15px;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 30px;
    background: #e67e22;
}

.globe {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #3498db, #2980b9);
    border-radius: 50%;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 24px;
}

.location-pin {
    position: absolute;
    top: -5px;
    right: 10px;
    width: 12px;
    height: 12px;
    background: #e74c3c;
    border-radius: 50% 50% 50% 0;
    transform: rotate(-45deg);
}

.step-connector {
    display: none;
}

/* Vertical Timeline Connector */
.how-it-works .container {
    position: relative;
}

.how-it-works .container::before {
    content: "";
    position: absolute;
    left: 50%;
    top: 100px;
    bottom: 100px;
    width: 3px;
    background: linear-gradient(180deg, transparent 0%, #0060FF 10%, #0060FF 90%, transparent 100%);
    transform: translateX(-50%);
    z-index: 1;
}

.step-container {
    position: relative;
    z-index: 2;
}

/*
        .step-container::before {
          content: '';
          position: absolute;
          left: 50%;
          top: 50%;
          width: 20px;
          height: 20px;
          background:#0060FF;
          border: 4px solid #E8F5F4;
          border-radius: 50%;
          transform: translate(-50%, -50%);
          z-index: 3;
          box-shadow: 0 0 0 4px #ffffff;
        } */
@media (max-width: 991px) {
    .how-it-works .container::before {
        display: none;
    }

    .step-container::before {
        display: none;
    }
}

/* Why Choose Section */
.why-choose-section {
    /* background: white; */
    padding: 30px 0;
}

.why-choose-section .row {
    display: flex;
    align-items: stretch;
}

.why-choose-section .row>[class*="col-"] {
    display: flex;
}

.why-choose-card {
    background: white;
    border: 1px solid #7a82ea;
    border-radius: 30px;
    padding: 40px 20px;
    text-align: center;
    box-shadow: 0px 4px 16.5px rgba(201, 209, 215, 0.25);
    margin-bottom: 30px;
    height: 420px;
    min-height: 420px;
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.why-choose-card.fast {
    border-color: #f67f55;
}

.why-choose-card.reliable {
    border-color: #7a82ea;
}

.why-choose-card.best-value {
    border-color: #2abcaa;
}

.card-badge {
    position: absolute;
    top: 0px;
    left: 50%;
    transform: translateX(-50%);
    width: 214px;
    border-radius: 0 0 32px 32px;
    padding: 0px 40px;
    font-size: 20px;
    font-weight: 700;
    color: white;
    padding: 8px 0;
    box-shadow: 0px 4px 0px rgba(223, 232, 230, 0.75);
}

.card-badge.fast {
    background: #f67f55;
}

.card-badge.reliable {
    background: #7a82ea;
}

.card-badge.best-value {
    background: #22b19f;
}

.why-choose-card h3 {
    font-size: 16px;
    font-weight: 400;
    color: #000000;
    line-height: 1.75;
    margin-top: 38px;
    margin-bottom: 0;
}

.why-choose-icon {
    width: 263px;
    height: 146px;
    margin: 0 auto 0px;
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
    flex-shrink: 0;
    background-color: #f8f8f8;
    padding: 20px 40px;
    background-size: unset;
    margin-top: 50px;
}

.why-choose-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 20px 0 60px 0;
    font-style: normal;
    font-weight: 400;
    line-height: 1.4;
    text-align: center;
    color: #000000;
    overflow: hidden;
}

/* Referral Section */
.referral-section {
    background: linear-gradient(to right, #000000 60%, #000c0b 80%);
    color: white;
    padding: 80px 0;
    text-align: center;
    position: relative;
}

.referral-section .row {
    display: flex;
    align-items: stretch;
}

.referral-section .row>[class*="col-"] {
    display: flex;
}

.referral-section::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url("/aivon/static/img/activity/invite/referral_bg.webp");
    background-size: cover;
    background-position: center;
    opacity: 0.4;
    /* Group 14863 */
}

.referral-title {
    font-size: 32px;
    font-weight: 700;
    line-height: 1.575;
    margin-bottom: 20px;
    position: relative;
    z-index: 2;
}

.referral-description {
    font-size: 16px;
    font-weight: 500;
    line-height: 1.75;
    margin-bottom: 60px;
    max-width: 723px;
    margin-left: auto;
    margin-right: auto;
    position: relative;
    z-index: 2;
}

.referral-card {
    background: rgba(0, 56, 59, 0.9);
    border: 1px solid rgba(41, 214, 226, 0.8);
    box-shadow: 0px 4px 10px rgba(0, 0, 0, 0.25);
    border-radius: 26px;
    margin-bottom: 30px;
    text-align: left;
    position: relative;
    height: 240px;
    min-height: 240px;
    z-index: 2;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
}

.referral-card h4 {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 15px 40px;
    font-size: 24px;
    font-weight: 700;
    color: white;
    margin-bottom: 15px;
    border-bottom: 1px solid #2AF2FF;
}

.referral-card p {
    padding: 10px 40px 40px 40px;
    margin-bottom: 0;
    font-family: "HarmonyOS Sans";
    font-style: normal;
    font-weight: 400;
    font-size: 16px;
    line-height: 28px;
    height: auto;
    /* or 175% */
    color: #ffffff;
}

/* FAQ Section */
.faq-section {
    padding: 40px 0px 80px 0px;
}

.faq-item {
    border-radius: 12px;
    margin-bottom: 20px;
    overflow: hidden;
    /* transition: all 0.3s ease; */
    /*    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);*/
}

.faq-item.active {
    border-color: #0060FF;
    box-shadow: 0 4px 16px rgba(0, 140, 149, 0.15);
    border: 2px solid #0060FF;
}

.faq-item:hover {
    border-color: #0060FF;
    border: 2px solid #0060FF;
    box-shadow: 0 4px 16px rgba(0, 140, 149, 0.15);
}

.faq-question {
    font-size: 18px;
    font-weight: 500;
    color: #000000;
    line-height: 1.4;
    padding: 25px 30px;
    margin: 0;
    cursor: pointer;
    background: white;
    border: none;
    width: 100%;
    text-align: left;
    position: relative;
    transition: all 0.3s ease;
}

.faq-question:hover {
    /* background: #f8fcfc; */
    color: #0060FF;
}

.faq-item.active .faq-question {
    /* background: #f8fcfc; */
    color: #0060FF;
}

.faq-question:after {
    content: "";
    background-image: url("/aivon/static/img/activity/invite/arrow_down.png");
    width: 24px;
    height: 24px;
    position: absolute;
    right: 30px;
    top: 50%;
    transform: translateY(-50%) rotate(0deg);
    font-size: 16px;
    color: #0060FF;
    transition: transform 0.3s ease;
}

.faq-item.active .faq-question:after {
    transform: translateY(-50%) rotate(180deg);
}

.faq-answer {
    background: white;
    padding: 0 30px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
    opacity: 0;
}

.faq-item.active .faq-answer {
    max-height: 600px;
    padding: 25px 30px 30px;
    opacity: 1;
    transition: max-height 0.4s ease, padding 0.4s ease, opacity 0.2s ease 0.1s;
}

.faq-answer-content {
    color: #5a6c70;
    font-size: 16px;
    line-height: 1.6;
    margin: 0;
}

.faq-answer-content p {
    margin-bottom: 15px;
}

.faq-answer-content p:last-child {
    margin-bottom: 0;
}

/* Footer */
.footer {
    background-image: url("/aivon/static/img/activity/invite/footer_bg.webp");
    background-repeat: no-repeat;
    background-position: center;
    background-size: cover;
    color: white;
    height: 550px;
    text-align: center;
    display: flex;
    justify-content: center;
    align-items: center;
}

.footer_bg {
    left: 0;
}

.footer>* {
    position: relative;
    z-index: 2;
}

.footer h2 {
    font-size: 38px;
    font-weight: 700;
    line-height: 1.172;
    margin-bottom: 40px;
}

.footer .btn {
    background: #0060FF;
    color: white;
    font-size: 24px;
    font-weight: 700;
    padding: 12px 48px;
    border-radius: 7.2px;
    border: none;
    margin-top: 20px;
    position: relative;
    z-index: 3;
}

.footer-links {
    margin-top: 40px;
    padding-top: 40px;
    border-top: 2px solid #0060FF;
}

.footer-links p {
    font-size: 16px;
    color: white;
    line-height: 2em;
    margin: 0;
}

/* Decorative Elements */
.decorative-coins {
    position: absolute;
    right: 10%;
    top: 20%;
    width: 337px;
    height: 435px;
    background-image: url("https://images.unsplash.com/photo-1605792657660-596af9009e82?w=400&h=400&fit=crop&crop=center");
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
    z-index: 1;
    opacity: 0.3;
}

.certification-logos {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 30px;
    margin-top: 40px;
    flex-wrap: wrap;
}

.cert-logo {
    width: 80px;
    height: 60px;
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
    opacity: 0.7;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-title {
        font-size: 36px;
    }

    .hero-subtitle {
        font-size: 18px;
    }

    .btn-signup {
        font-size: 20px;
        padding: 12px 32px;
    }

    .feature-title,
    .section-title {
        font-size: 28px;
    }

    .feature-card {
        height: auto;
        min-height: 300px;
        padding: 25px 15px;
    }

    .step-title {
        font-size: 22px;
    }

    .step-visual {
        height: 200px;
        margin-top: 30px;
        padding: 30px;
    }

    .monitor {
        width: 80px;
        height: 60px;
    }

    .monitor-screen {
        font-size: 8px;
    }

    .laptop {
        width: 100px;
        height: 70px;
    }

    .laptop-screen {
        font-size: 8px;
    }

    .price-highlight {
        font-size: 10px;
        padding: 2px 4px;
    }

    .package {
        width: 40px;
        height: 40px;
        margin-right: 15px;
    }

    .globe {
        width: 60px;
        height: 60px;
        font-size: 20px;
    }

    .section-title {
        font-size: 32px;
        margin-bottom: 60px;
    }

    .step-container {
        margin-bottom: 60px;
    }

    .step-card {
        padding: 40px 30px;
    }

    .why-choose-card {
        height: auto;
        min-height: 300px;
    }

    .referral-card {
        height: auto;
        min-height: 160px;
    }

    .referral-title {
        font-size: 28px;
    }

    .decorative-coins {
        display: none;
    }

    .certification-logos {
        flex-direction: column;
        gap: 20px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 28px;
    }

    .feature-card {
        height: auto;
        min-height: 250px;
        padding: 25px 15px;
    }

    .feature-card h3 {
        font-size: 20px;
    }

    .step-number {
        font-size: 22px;
    }

    .step-title {
        font-size: 20px;
    }

    .step-visual {
        height: 160px;
        padding: 30px 20px;
    }

    .monitor {
        width: 70px;
        height: 50px;
    }

    .monitor-screen {
        font-size: 7px;
    }

    .laptop {
        width: 90px;
        height: 60px;
    }

    .laptop-screen {
        font-size: 7px;
    }

    .price-highlight {
        font-size: 9px;
        padding: 2px 3px;
    }

    .package {
        width: 35px;
        height: 35px;
        margin-right: 12px;
    }

    .globe {
        width: 50px;
        height: 50px;
        font-size: 18px;
    }

    .step-card {
        padding: 30px 20px;
    }

    .step-number {
        width: 50px;
        height: 50px;
        line-height: 50px;
        font-size: 18px;
    }

    .section-title {
        font-size: 28px;
        margin-bottom: 0px;
    }

    .step-container {
        margin-bottom: 50px;
    }

    .why-choose-card {
        height: auto;
        min-height: 270px;
        padding: 30px 15px;
    }

    .referral-card {
        height: auto;
        min-height: 140px;
        padding: 25px 20px;
    }
}

.liquid-button {
    color: white;
    border-radius: 16px;
    text-transform: none;
    margin-top: 50px;
    text-align: center;
    text-decoration: none;
    overflow: hidden;
    position: relative;
    transition: all .2s ease-out 0s;
    font-family: 'HarmonyOS Sans';
    font-style: normal;
    font-weight: 900;
    font-size: 32px;
    line-height: 28px;
    align-items: center;
    text-align: center;
    color: #FFFFFF;
}

.liquid-button:hover>span {
    top: -20px;
    opacity: 0;
    /*        background-color: #00A9B5;*/
}

.liquid-button:hover>i {
    opacity: 1;
    font-size: 22px;
    top: 50%;
}

.liquid-button:hover {
    /*        background: #00A9B5;*/
    color: white;
    transform: translateY(-2px);
}

.liquid-button:focus {
    /*        background: #00A9B5;*/
    color: white;
}

.liquid-button:active {
    background-color: #00A9B5;
}

.liquid-button-name,
.liquid-button-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    -webkit-transform: translate(-50%, -50%);
    transform: translate(-50%, -50%);
    transition: all .3s ease-out;
    position: absolute;
}

.liquid-button-name {
    font-size: 24px;
    font-weight: 900;
    opacity: 1;
}

.liquid-button-icon {
    opacity: 0;
}

.card__hover:hover {
    transform: translate3d(0, -8px, .01px);
    transition: all 0.5s;
}

/* 用户已登录时隐藏元素的样式 */
.user-logged-in .hide-when-logged-in {
    display: none !important;
}

/* 可选：也可以使用淡出效果 */
.user-logged-in .fade-when-logged-in {
    opacity: 0.3;
    pointer-events: none;
}

/* 视频容器样式 */
.video-container {
    position: relative;
    width: 100%;
    margin: 40px auto;
    margin-bottom: 0px;
    border-radius: 30px;
    padding: 80px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.video-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('/aivon/static/img/activity/invite/video_bg.webp');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    border-radius: 30px;
    opacity: 0.8;
    z-index: -1;
}

.video-container::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #0C1514;
    border-radius: 30px;
    opacity: 0.6;
    z-index: -1;
}

.video-wrapper {
    position: relative;
    width: 100%;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 12px 40px rgba(0, 140, 149, 0.25);
    /* background-image: url('/aivon/static/img/activity/invite/video_bg.webp'); */
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    aspect-ratio: 16/9;
}

.promotional-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 20px;
}

.video-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg,
            rgba(0, 140, 149, 0.1) 0%,
            rgba(72, 202, 202, 0.05) 50%,
            rgba(1, 144, 153, 0.1) 100%);
    border-radius: 20px;
    pointer-events: none;
}

/* 底部装饰边框 */
.video-border-frame {
    position: relative;
    width: 120%;
    height: 60px;
    margin-top: -30px;
    background: linear-gradient(135deg, #48CACA 0%, #019099 100%);
    border-radius: 30px;
    box-shadow: 0 8px 32px rgba(0, 140, 149, 0.3);
    z-index: -1;
}

.video-border-frame::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: calc(100% - 8px);
    height: calc(100% - 8px);
    background: #e8f5f4;
    border-radius: 26px;
}

.video-border-frame::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60%;
    height: 4px;
    background: linear-gradient(90deg, transparent 0%, #0060FF 20%, #0060FF 80%, transparent 100%);
    border-radius: 2px;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}



/* LP4 Prototype Showcase (BEM) */
.lp4__showcase {
    display: flex;
    justify-content: center;
    gap: var(--aiv-gap, 36px);
}

.lp4__card {
    background: #fff;
    border-radius: var(--p4-radius);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
    width: 401px;
    height: 396px;
    /* 根据容器宽度调整 */
    overflow: hidden;
    display: flex;
    flex-direction: column;
    text-align: center;
    transition: transform 0.3s ease;
}

.lp4__card:hover {
    transform: translateY(-5px);
}

.lp4__card-media {
    width: 100%;
    height: 198px;
    background-color: #f5f5f5;
    overflow: hidden;
}

.lp4__card-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.lp4__card-body {
    padding: 24px 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* 复用 .main-text 颜色，但增加 BEM 结构控制 */
.lp4__card-label {
    margin-bottom: 8px;
    font-family: 'HarmonyOS Sans';
    font-style: normal;
    font-weight: 700;
    font-size: 20px;
    line-height: 30px;
    color: #222;



}

.lp4__card-title {
    font-size: 20px;
    font-weight: 700;
    margin: 0 0 12px;
    color: #0060FF;

}

.lp4__card-desc {
    font-family: 'HarmonyOS Sans';
    font-style: normal;
    font-weight: 400;
    font-size: 16px;
    line-height: 24px;
    color: #37393F;
}

/*  */

/* --- LP4 Sections (How it works, Why, Highlights) --- */
.lp4__section {
    text-align: center;
    margin: 0 auto;
}

.lp4__section-title {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 50px;
    font-family: 'HarmonyOS Sans';
    font-style: normal;
    font-weight: 700;
    font-size: 34px;
    line-height: 36px;


    color: #02033B;


}

/* How It Works Flow */
.lp4__steps {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    position: relative;
}

.lp4__step {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    z-index: 1;
}

.lp4__step-num {


    font-family: 'HarmonyOS Sans';
    font-style: normal;
    font-weight: 700;
    font-size: 20px;
    line-height: 53px;
    /* or 266% */
    text-align: center;

    color: #A9A9A9;


}

.lp4__step-title {
    font-size: 20px;
    font-weight: 600;
    color: #0060FF;
    margin-bottom: 20px;
    height: 40px;
    /* 对齐标题高度 */
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 0 10px;
}

.lp4__step-img-box {
    height: 180px;
    position: relative;
}

.lp4__step-img-box--active {
    /* border-color: #0060FF; */
    /* background: #fff; */
    /* box-shadow: 0 4px 16px rgba(0, 96, 255, 0.15); */
}

.lp4__step-img-box img {
    width: 1210px;
    height: 172px;
    position: absolute;
    top: 0;
    left: 0;
    transform: translateX(-90px);
}

.lp4__step-desc {
    max-width: 240px;
    font-family: 'HarmonyOS Sans';
    font-style: normal;
    font-weight: 400;
    font-size: 16px;
    line-height: 24px;
    color: #37393F;

}

.lp4__step-arrow {
    flex: 0.4;
    height: 2px;
    background: #E0E0E0;
    margin-top: 95px;
    /* 对齐到圆圈中间 */
    position: relative;
}

.lp4__step-arrow::after {
    content: '';
    position: absolute;
    right: 0;
    top: -4px;
    width: 8px;
    height: 8px;
    border-top: 2px solid #E0E0E0;
    border-right: 2px solid #E0E0E0;
    transform: rotate(45deg);
}

.lp4__btn-primary {
    background-color: #0060FF;
    color: #fff;
    padding: 12px 30px;
    border-radius: 6px;
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    display: inline-block;
    margin-top: 10px;
    transition: background 0.3s;
}

.lp4__btn-primary:hover {
    background-color: #5293FF;
    color: #fff;
    text-decoration: none;
}

/* Why AIVON Grid */
.lp4__features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--aiv-gap,36px);
    padding: 0 0px;
}

.lp4__feature-card {
    background: #fff;
    border-radius: 16px;
    padding: 36px 36px;
    display: flex;
    align-items: center;
    text-align: left;
    transition: transform 0.3s;
    background: #FFFFFF;
    border: 1px solid #E8E8E8;
    /* 专题页投影 */
    box-shadow: 6px 10px 20px rgba(5, 12, 22, 0.1);
    border-radius: 20px;

}

.lp4__feature-card:hover {
    transform: translateY(-5px);
}

.lp4__feature-icon {
    width: 79px;
    height: 79px;
    margin-right: 20px;
    flex-shrink: 0;
}

.lp4__feature-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.lp4__feature-content {
    flex: 1;
}

.lp4__feature-title {
    font-family: 'HarmonyOS Sans';
    font-style: normal;
    font-weight: 700;
    font-size: 20px;
    line-height: 28px;
    color: #222222;
}

.lp4__feature-desc {
    font-family: 'HarmonyOS Sans';
    font-style: normal;
    font-weight: 400;
    font-size: 14px;
    line-height: 22px;
    color: #37393F;
}

/* Customer Highlights */
.lp4__testimonials {
    display: flex;
    justify-content: center;
    gap: var(--aiv-gap);
}

.lp4__testi-card {
    background: #fff;
    border-radius: var(--p4-radius);
    padding: 36px 36px;
    width: 408px;
    height: 244px;
    text-align: left;
    display: flex;
    flex-direction: column;
    border: 1px solid #E8E8E8;
    /* 专题页投影 */
    box-shadow: 6px 10px 20px rgba(5, 12, 22, 0.1);
    transition: transform 0.3s;
}
.lp4__testi-card:hover {
    transform: translateY(-5px);
}
.lp4__testi-stars {
    color: #FFB800;
    font-size: 18px;
    margin-bottom: 20px;
    letter-spacing: 2px;
}

.lp4__testi-text {
    font-size: 15px;
    color: #333;
    line-height: 1.6;
    margin-bottom: 25px;
    flex: 1;
    font-family: 'Inter';
    font-style: normal;
    font-weight: 400;
    font-size: 14px;
    line-height: 20px;
    color: #37393F;
}

.lp4__testi-author {
    font-size: 12px;
    color: #000;
    font-weight: 700;
    font-family: 'HarmonyOS Sans';
    font-style: normal;
    font-weight: 700;
    font-size: 15px;
    line-height: 20px;
    color: #37393F;
}